* 'lguest' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest: Odd Fixes
lguest: clean up warnings in demonstration launcher.
retval = user_path(pathname, &path);
if (!retval) {
- retval = do_osf_statfs(&path buffer, bufsiz);
+ retval = do_osf_statfs(&path, buffer, bufsiz);
path_put(&path);
}
return retval;
# CONFIG_BLK_DEV_BSG is not set
CONFIG_ARCH_OMAP=y
CONFIG_ARCH_OMAP4=y
+# CONFIG_ARCH_OMAP2PLUS_TYPICAL is not set
+# CONFIG_ARCH_OMAP2 is not set
+# CONFIG_ARCH_OMAP3 is not set
# CONFIG_OMAP_MUX is not set
CONFIG_OMAP_32K_TIMER=y
CONFIG_OMAP_DM_TIMER=y
etb_lock(t);
}
-static void sysrq_etm_dump(int key, struct tty_struct *tty)
+static void sysrq_etm_dump(int key)
{
dev_dbg(tracer.dev, "Dumping ETB buffer\n");
etm_dump();
obj-$(CONFIG_HOTPLUG_CPU) += omap-hotplug.o
obj-$(CONFIG_ARCH_OMAP4) += omap44xx-smc.o omap4-common.o
+AFLAGS_omap-headsmp.o :=-Wa,-march=armv7-a
AFLAGS_omap44xx-smc.o :=-Wa,-march=armv7-a
# Functions loaded to SRAM
struct omap_clk *c;
u32 cpu_clkflg = CK_3XXX;
- if (cpu_is_omap34xx()) {
+ if (cpu_is_omap3517()) {
+ cpu_mask = RATE_IN_3XXX | RATE_IN_3430ES2PLUS;
+ cpu_clkflg |= CK_3517;
+ } else if (cpu_is_omap3505()) {
+ cpu_mask = RATE_IN_3XXX | RATE_IN_3430ES2PLUS;
+ cpu_clkflg |= CK_3505;
+ } else if (cpu_is_omap34xx()) {
cpu_mask = RATE_IN_3XXX;
cpu_clkflg |= CK_343X;
cpu_mask |= RATE_IN_3430ES2PLUS;
cpu_clkflg |= CK_3430ES2;
}
- } else if (cpu_is_omap3517()) {
- cpu_mask = RATE_IN_3XXX | RATE_IN_3430ES2PLUS;
- cpu_clkflg |= CK_3517;
- } else if (cpu_is_omap3505()) {
- cpu_mask = RATE_IN_3XXX | RATE_IN_3430ES2PLUS;
- cpu_clkflg |= CK_3505;
}
if (omap3_has_192mhz_clk())
default:
omap_revision = OMAP3630_REV_ES1_2;
omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
- break;
}
+ break;
default:
/* Unknown default to latest silicon rev as default*/
omap_revision = OMAP3630_REV_ES1_2;
cmpne \irqnr, \tmp
cmpcs \irqnr, \irqnr
.endm
+#endif
+#endif /* MULTI_OMAP2 */
+#ifdef CONFIG_SMP
/* We assume that irqstat (the raw value of the IRQ acknowledge
* register) is preserved from the macro above.
* If there is an IPI, we immediately signal end of interrupt
streq \irqstat, [\base, #GIC_CPU_EOI]
cmp \tmp, #0
.endm
-#endif
-#endif /* MULTI_OMAP2 */
+#endif /* CONFIG_SMP */
.macro irq_prio_table
.endm
* Send a 'sev' to wake the secondary core from WFE.
* Drain the outstanding writes to memory
*/
- dsb();
- set_event();
+ dsb_sev();
mb();
}
}
/* Disable IO-PAD and IO-CHAIN wakeup */
- if (omap3_has_io_wakeup() && core_next_state < PWRDM_POWER_ON) {
+ if (omap3_has_io_wakeup() &&
+ (per_next_state < PWRDM_POWER_ON ||
+ core_next_state < PWRDM_POWER_ON)) {
prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, PM_WKEN);
omap3_disable_io_chain();
}
#include <asm/hardware/gic.h>
-/*
- * set_event() is used to wake up secondary core from wfe using sev. ROM
- * code puts the second core into wfe(standby).
- *
- */
-#define set_event() __asm__ __volatile__ ("sev" : : : "memory")
-
/* Needed for secondary core boot */
extern void omap_secondary_startup(void);
extern u32 omap_modify_auxcoreboot0(u32 set_mask, u32 clear_mask);
ch = ia64_ssc(0, 0, 0, 0,
SSC_GETCHAR);
while (!ch);
- handle_sysrq(ch, NULL);
+ handle_sysrq(ch);
}
#endif
seen_esc = 0;
}
#ifdef CONFIG_MAGIC_SYSRQ
-static void sysrq_handle_xmon(int key, struct tty_struct *tty)
+static void sysrq_handle_xmon(int key)
{
/* ensure xmon is enabled */
xmon_init(1);
debugger(get_irq_regs());
}
-static struct sysrq_key_op sysrq_xmon_op =
-{
+static struct sysrq_key_op sysrq_xmon_op = {
.handler = sysrq_handle_xmon,
.help_msg = "Xmon",
.action_msg = "Entering xmon",
#ifdef CONFIG_MAGIC_SYSRQ
-static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+static void sysrq_handle_globreg(int key)
{
arch_trigger_all_cpu_backtrace();
}
static void sysrq_proc(void *arg)
{
char *op = arg;
- handle_sysrq(*op, NULL);
+ handle_sysrq(*op);
}
void mconsole_sysrq(struct mc_request *req)
config PATA_WINBOND_VLB
tristate "Winbond W83759A VLB PATA support (Experimental)"
depends on ISA && EXPERIMENTAL
+ select PATA_LEGACY
help
Support for the Winbond W83759A controller on Vesa Local Bus
systems.
obj-$(CONFIG_PATA_RB532) += pata_rb532_cf.o
obj-$(CONFIG_PATA_RZ1000) += pata_rz1000.o
obj-$(CONFIG_PATA_SAMSUNG_CF) += pata_samsung_cf.o
-obj-$(CONFIG_PATA_WINBOND_VLB) += pata_winbond.o
obj-$(CONFIG_PATA_PXA) += pata_pxa.o
board_ahci,
board_ahci_ign_iferr,
board_ahci_nosntf,
+ board_ahci_yes_fbs,
/* board IDs for specific chipsets in alphabetical order */
board_ahci_mcp65,
.udma_mask = ATA_UDMA6,
.port_ops = &ahci_ops,
},
+ [board_ahci_yes_fbs] =
+ {
+ AHCI_HFLAGS (AHCI_HFLAG_YES_FBS),
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_ops,
+ },
/* by chipsets */
[board_ahci_mcp65] =
{
/* Marvell */
{ PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
{ PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv }, /* 6121 */
+ { PCI_DEVICE(0x1b4b, 0x9123),
+ .driver_data = board_ahci_yes_fbs }, /* 88se9128 */
/* Promise */
{ PCI_VDEVICE(PROMISE, 0x3f20), board_ahci }, /* PDC42819 */
link offline */
AHCI_HFLAG_NO_SNTF = (1 << 12), /* no sntf */
AHCI_HFLAG_NO_FPDMA_AA = (1 << 13), /* no FPDMA AA */
+ AHCI_HFLAG_YES_FBS = (1 << 14), /* force FBS cap on */
/* ap->flags bits */
cap &= ~HOST_CAP_SNTF;
}
+ if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
+ dev_printk(KERN_INFO, dev,
+ "controller can do FBS, turning on CAP_FBS\n");
+ cap |= HOST_CAP_FBS;
+ }
+
if (force_port_map && port_map != force_port_map) {
dev_printk(KERN_INFO, dev, "forcing port_map 0x%x -> 0x%x\n",
port_map, force_port_map);
u32 cmd = readl(port_mmio + PORT_CMD);
if (cmd & PORT_CMD_FBSCP)
pp->fbs_supported = true;
- else
+ else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
+ dev_printk(KERN_INFO, dev,
+ "port %d can do FBS, forcing FBSCP\n",
+ ap->port_no);
+ pp->fbs_supported = true;
+ } else
dev_printk(KERN_WARNING, dev,
- "The port is not capable of FBS\n");
+ "port %d is not capable of FBS\n",
+ ap->port_no);
}
if (pp->fbs_supported) {
qc->flags |= ATA_QCFLAG_ACTIVE;
ap->qc_active |= 1 << qc->tag;
- /* We guarantee to LLDs that they will have at least one
+ /*
+ * We guarantee to LLDs that they will have at least one
* non-zero sg if the command is a data command.
*/
- BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
+ if (WARN_ON_ONCE(ata_is_data(prot) &&
+ (!qc->sg || !qc->n_elem || !qc->nbytes)))
+ goto sys_err;
if (ata_is_dma(prot) || (ata_is_pio(prot) &&
(ap->flags & ATA_FLAG_PIO_DMA)))
if (ata_sg_setup(qc))
- goto sg_err;
+ goto sys_err;
/* if device is sleeping, schedule reset and abort the link */
if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
goto err;
return;
-sg_err:
+sys_err:
qc->err_mask |= AC_ERR_SYSTEM;
err:
ata_qc_complete(qc);
{
struct ata_port *ap = qc->ap;
- /* see ata_dma_blacklisted() */
- BUG_ON((ap->flags & ATA_FLAG_PIO_POLLING) &&
- qc->tf.protocol == ATAPI_PROT_DMA);
-
/* defer PIO handling to sff_qc_issue */
if (!ata_is_dma(qc->tf.protocol))
return ata_sff_qc_issue(qc);
if (pair) {
struct ata_timing tp;
-
ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
- if (pair->dma_mode) {
- ata_timing_compute(pair, pair->dma_mode,
- &tp, T, 0);
- ata_timing_merge(&tp, &t, &t, ATA_TIMING_SETUP);
- }
}
}
* Specific support is included for the ht6560a/ht6560b/opti82c611a/
* opti82c465mv/promise 20230c/20630/qdi65x0/winbond83759A
*
+ * Support for the Winbond 83759A when operating in advanced mode.
+ * Multichip mode is not currently supported.
+ *
* Use the autospeed and pio_mask options with:
* Appian ADI/2 aka CLPD7220 or AIC25VL01.
* Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with
static int opti82c611a; /* Opti82c611A on primary 1, sec 2, both 3 */
static int opti82c46x; /* Opti 82c465MV present(pri/sec autodetect) */
static int qdi; /* Set to probe QDI controllers */
-static int winbond; /* Set to probe Winbond controllers,
- give I/O port if non standard */
static int autospeed; /* Chip present which snoops speed changes */
static int pio_mask = ATA_PIO4; /* PIO range for autospeed devices */
static int iordy_mask = 0xFFFFFFFF; /* Use iordy if available */
+#ifdef PATA_WINBOND_VLB_MODULE
+static int winbond = 1; /* Set to probe Winbond controllers,
+ give I/O port if non standard */
+#else
+static int winbond; /* Set to probe Winbond controllers,
+ give I/O port if non standard */
+#endif
+
/**
* legacy_probe_add - Add interface to probe list
* @port: Controller port
MODULE_DESCRIPTION("low-level driver for legacy ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
+MODULE_ALIAS("pata_winbond");
module_param(probe_all, int, 0);
module_param(autospeed, int, 0);
module_param(opti82c611a, int, 0);
module_param(opti82c46x, int, 0);
module_param(qdi, int, 0);
+module_param(winbond, int, 0);
module_param(pio_mask, int, 0);
module_param(iordy_mask, int, 0);
+++ /dev/null
-/*
- * pata_winbond.c - Winbond VLB ATA controllers
- * (C) 2006 Red Hat
- *
- * Support for the Winbond 83759A when operating in advanced mode.
- * Multichip mode is not currently supported.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/blkdev.h>
-#include <linux/delay.h>
-#include <scsi/scsi_host.h>
-#include <linux/libata.h>
-#include <linux/platform_device.h>
-
-#define DRV_NAME "pata_winbond"
-#define DRV_VERSION "0.0.3"
-
-#define NR_HOST 4 /* Two winbond controllers, two channels each */
-
-struct winbond_data {
- unsigned long config;
- struct platform_device *platform_dev;
-};
-
-static struct ata_host *winbond_host[NR_HOST];
-static struct winbond_data winbond_data[NR_HOST];
-static int nr_winbond_host;
-
-#ifdef MODULE
-static int probe_winbond = 1;
-#else
-static int probe_winbond;
-#endif
-
-static DEFINE_SPINLOCK(winbond_lock);
-
-static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
-{
- unsigned long flags;
- spin_lock_irqsave(&winbond_lock, flags);
- outb(reg, port + 0x01);
- outb(val, port + 0x02);
- spin_unlock_irqrestore(&winbond_lock, flags);
-}
-
-static u8 winbond_readcfg(unsigned long port, u8 reg)
-{
- u8 val;
-
- unsigned long flags;
- spin_lock_irqsave(&winbond_lock, flags);
- outb(reg, port + 0x01);
- val = inb(port + 0x02);
- spin_unlock_irqrestore(&winbond_lock, flags);
-
- return val;
-}
-
-static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
-{
- struct ata_timing t;
- struct winbond_data *winbond = ap->host->private_data;
- int active, recovery;
- u8 reg;
- int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
-
- reg = winbond_readcfg(winbond->config, 0x81);
-
- /* Get the timing data in cycles */
- if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
- ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
- else
- ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
-
- active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
- recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
- timing = (active << 4) | recovery;
- winbond_writecfg(winbond->config, timing, reg);
-
- /* Load the setup timing */
-
- reg = 0x35;
- if (adev->class != ATA_DEV_ATA)
- reg |= 0x08; /* FIFO off */
- if (!ata_pio_need_iordy(adev))
- reg |= 0x02; /* IORDY off */
- reg |= (clamp_val(t.setup, 0, 3) << 6);
- winbond_writecfg(winbond->config, timing + 1, reg);
-}
-
-
-static unsigned int winbond_data_xfer(struct ata_device *dev,
- unsigned char *buf, unsigned int buflen, int rw)
-{
- struct ata_port *ap = dev->link->ap;
- int slop = buflen & 3;
-
- if (ata_id_has_dword_io(dev->id)) {
- if (rw == READ)
- ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
- else
- iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
-
- if (unlikely(slop)) {
- __le32 pad;
- if (rw == READ) {
- pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
- memcpy(buf + buflen - slop, &pad, slop);
- } else {
- memcpy(&pad, buf + buflen - slop, slop);
- iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
- }
- buflen += 4 - slop;
- }
- } else
- buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
-
- return buflen;
-}
-
-static struct scsi_host_template winbond_sht = {
- ATA_PIO_SHT(DRV_NAME),
-};
-
-static struct ata_port_operations winbond_port_ops = {
- .inherits = &ata_sff_port_ops,
- .sff_data_xfer = winbond_data_xfer,
- .cable_detect = ata_cable_40wire,
- .set_piomode = winbond_set_piomode,
-};
-
-/**
- * winbond_init_one - attach a winbond interface
- * @type: Type to display
- * @io: I/O port start
- * @irq: interrupt line
- * @fast: True if on a > 33Mhz VLB
- *
- * Register a VLB bus IDE interface. Such interfaces are PIO and we
- * assume do not support IRQ sharing.
- */
-
-static __init int winbond_init_one(unsigned long port)
-{
- struct platform_device *pdev;
- u8 reg;
- int i, rc;
-
- reg = winbond_readcfg(port, 0x81);
- reg |= 0x80; /* jumpered mode off */
- winbond_writecfg(port, 0x81, reg);
- reg = winbond_readcfg(port, 0x83);
- reg |= 0xF0; /* local control */
- winbond_writecfg(port, 0x83, reg);
- reg = winbond_readcfg(port, 0x85);
- reg |= 0xF0; /* programmable timing */
- winbond_writecfg(port, 0x85, reg);
-
- reg = winbond_readcfg(port, 0x81);
-
- if (!(reg & 0x03)) /* Disabled */
- return -ENODEV;
-
- for (i = 0; i < 2 ; i ++) {
- unsigned long cmd_port = 0x1F0 - (0x80 * i);
- unsigned long ctl_port = cmd_port + 0x206;
- struct ata_host *host;
- struct ata_port *ap;
- void __iomem *cmd_addr, *ctl_addr;
-
- if (!(reg & (1 << i)))
- continue;
-
- pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- rc = -ENOMEM;
- host = ata_host_alloc(&pdev->dev, 1);
- if (!host)
- goto err_unregister;
- ap = host->ports[0];
-
- rc = -ENOMEM;
- cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
- ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
- if (!cmd_addr || !ctl_addr)
- goto err_unregister;
-
- ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
-
- ap->ops = &winbond_port_ops;
- ap->pio_mask = ATA_PIO4;
- ap->flags |= ATA_FLAG_SLAVE_POSS;
- ap->ioaddr.cmd_addr = cmd_addr;
- ap->ioaddr.altstatus_addr = ctl_addr;
- ap->ioaddr.ctl_addr = ctl_addr;
- ata_sff_std_ports(&ap->ioaddr);
-
- /* hook in a private data structure per channel */
- host->private_data = &winbond_data[nr_winbond_host];
- winbond_data[nr_winbond_host].config = port;
- winbond_data[nr_winbond_host].platform_dev = pdev;
-
- /* activate */
- rc = ata_host_activate(host, 14 + i, ata_sff_interrupt, 0,
- &winbond_sht);
- if (rc)
- goto err_unregister;
-
- winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
- }
-
- return 0;
-
- err_unregister:
- platform_device_unregister(pdev);
- return rc;
-}
-
-/**
- * winbond_init - attach winbond interfaces
- *
- * Attach winbond IDE interfaces by scanning the ports it may occupy.
- */
-
-static __init int winbond_init(void)
-{
- static const unsigned long config[2] = { 0x130, 0x1B0 };
-
- int ct = 0;
- int i;
-
- if (probe_winbond == 0)
- return -ENODEV;
-
- /*
- * Check both base addresses
- */
-
- for (i = 0; i < 2; i++) {
- if (probe_winbond & (1<<i)) {
- int ret = 0;
- unsigned long port = config[i];
-
- if (request_region(port, 2, "pata_winbond")) {
- ret = winbond_init_one(port);
- if (ret <= 0)
- release_region(port, 2);
- else ct+= ret;
- }
- }
- }
- if (ct != 0)
- return 0;
- return -ENODEV;
-}
-
-static __exit void winbond_exit(void)
-{
- int i;
-
- for (i = 0; i < nr_winbond_host; i++) {
- ata_host_detach(winbond_host[i]);
- release_region(winbond_data[i].config, 2);
- platform_device_unregister(winbond_data[i].platform_dev);
- }
-}
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_VERSION);
-
-module_init(winbond_init);
-module_exit(winbond_exit);
-
-module_param(probe_winbond, int, 0);
-
{
struct scatterlist *sg = qc->sg;
struct ata_port *ap = qc->ap;
- u32 dma_chan;
+ int dma_chan;
struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
int err;
* LOCKING:
* Inherited from caller.
*/
-static void mv_bmdma_stop(struct ata_queued_cmd *qc)
+static void mv_bmdma_stop_ap(struct ata_port *ap)
{
- struct ata_port *ap = qc->ap;
void __iomem *port_mmio = mv_ap_base(ap);
u32 cmd;
/* clear start/stop bit */
cmd = readl(port_mmio + BMDMA_CMD);
- cmd &= ~ATA_DMA_START;
- writelfl(cmd, port_mmio + BMDMA_CMD);
+ if (cmd & ATA_DMA_START) {
+ cmd &= ~ATA_DMA_START;
+ writelfl(cmd, port_mmio + BMDMA_CMD);
+
+ /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
+ ata_sff_dma_pause(ap);
+ }
+}
- /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_sff_dma_pause(ap);
+static void mv_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ mv_bmdma_stop_ap(qc->ap);
}
/**
reg = readl(port_mmio + BMDMA_STATUS);
if (reg & ATA_DMA_ACTIVE)
status = ATA_DMA_ACTIVE;
- else
+ else if (reg & ATA_DMA_ERR)
status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR;
+ else {
+ /*
+ * Just because DMA_ACTIVE is 0 (DMA completed),
+ * this does _not_ mean the device is "done".
+ * So we should not yet be signalling ATA_DMA_INTR
+ * in some cases. Eg. DSM/TRIM, and perhaps others.
+ */
+ mv_bmdma_stop_ap(ap);
+ if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY)
+ status = 0;
+ else
+ status = ATA_DMA_INTR;
+ }
return status;
}
switch (tf->protocol) {
case ATA_PROT_DMA:
+ if (tf->command == ATA_CMD_DSM)
+ return;
+ /* fall-thru */
case ATA_PROT_NCQ:
break; /* continue below */
case ATA_PROT_PIO:
if ((tf->protocol != ATA_PROT_DMA) &&
(tf->protocol != ATA_PROT_NCQ))
return;
+ if (tf->command == ATA_CMD_DSM)
+ return; /* use bmdma for this */
/* Fill in Gen IIE command request block */
if (!(tf->flags & ATA_TFLAG_WRITE))
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
+ if (qc->tf.command == ATA_CMD_DSM) {
+ if (!ap->ops->bmdma_setup) /* no bmdma on GEN_I */
+ return AC_ERR_OTHER;
+ break; /* use bmdma for this */
+ }
+ /* fall thru */
case ATA_PROT_NCQ:
mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
if (hangcheck_dump_tasks) {
printk(KERN_CRIT "Hangcheck: Task state:\n");
#ifdef CONFIG_MAGIC_SYSRQ
- handle_sysrq('t', NULL);
+ handle_sysrq('t');
#endif /* CONFIG_MAGIC_SYSRQ */
}
if (hangcheck_reboot) {
if (sysrq_pressed)
continue;
} else if (sysrq_pressed) {
- handle_sysrq(buf[i], tty);
+ handle_sysrq(buf[i]);
sysrq_pressed = 0;
continue;
}
hp->sysrq = 1;
continue;
} else if (hp->sysrq) {
- handle_sysrq(c, hp->tty);
+ handle_sysrq(c);
hp->sysrq = 0;
continue;
}
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/fs.h>
-#include <linux/tty.h>
#include <linux/mount.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
__setup("sysrq_always_enabled", sysrq_always_enabled_setup);
-static void sysrq_handle_loglevel(int key, struct tty_struct *tty)
+static void sysrq_handle_loglevel(int key)
{
int i;
};
#ifdef CONFIG_VT
-static void sysrq_handle_SAK(int key, struct tty_struct *tty)
+static void sysrq_handle_SAK(int key)
{
struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
schedule_work(SAK_work);
#endif
#ifdef CONFIG_VT
-static void sysrq_handle_unraw(int key, struct tty_struct *tty)
+static void sysrq_handle_unraw(int key)
{
struct kbd_struct *kbd = &kbd_table[fg_console];
#define sysrq_unraw_op (*(struct sysrq_key_op *)NULL)
#endif /* CONFIG_VT */
-static void sysrq_handle_crash(int key, struct tty_struct *tty)
+static void sysrq_handle_crash(int key)
{
char *killer = NULL;
.enable_mask = SYSRQ_ENABLE_DUMP,
};
-static void sysrq_handle_reboot(int key, struct tty_struct *tty)
+static void sysrq_handle_reboot(int key)
{
lockdep_off();
local_irq_enable();
.enable_mask = SYSRQ_ENABLE_BOOT,
};
-static void sysrq_handle_sync(int key, struct tty_struct *tty)
+static void sysrq_handle_sync(int key)
{
emergency_sync();
}
.enable_mask = SYSRQ_ENABLE_SYNC,
};
-static void sysrq_handle_show_timers(int key, struct tty_struct *tty)
+static void sysrq_handle_show_timers(int key)
{
sysrq_timer_list_show();
}
.action_msg = "Show clockevent devices & pending hrtimers (no others)",
};
-static void sysrq_handle_mountro(int key, struct tty_struct *tty)
+static void sysrq_handle_mountro(int key)
{
emergency_remount();
}
};
#ifdef CONFIG_LOCKDEP
-static void sysrq_handle_showlocks(int key, struct tty_struct *tty)
+static void sysrq_handle_showlocks(int key)
{
debug_show_all_locks();
}
static DECLARE_WORK(sysrq_showallcpus, sysrq_showregs_othercpus);
-static void sysrq_handle_showallcpus(int key, struct tty_struct *tty)
+static void sysrq_handle_showallcpus(int key)
{
/*
* Fall back to the workqueue based printing if the
};
#endif
-static void sysrq_handle_showregs(int key, struct tty_struct *tty)
+static void sysrq_handle_showregs(int key)
{
struct pt_regs *regs = get_irq_regs();
if (regs)
.enable_mask = SYSRQ_ENABLE_DUMP,
};
-static void sysrq_handle_showstate(int key, struct tty_struct *tty)
+static void sysrq_handle_showstate(int key)
{
show_state();
}
.enable_mask = SYSRQ_ENABLE_DUMP,
};
-static void sysrq_handle_showstate_blocked(int key, struct tty_struct *tty)
+static void sysrq_handle_showstate_blocked(int key)
{
show_state_filter(TASK_UNINTERRUPTIBLE);
}
#ifdef CONFIG_TRACING
#include <linux/ftrace.h>
-static void sysrq_ftrace_dump(int key, struct tty_struct *tty)
+static void sysrq_ftrace_dump(int key)
{
ftrace_dump(DUMP_ALL);
}
#define sysrq_ftrace_dump_op (*(struct sysrq_key_op *)NULL)
#endif
-static void sysrq_handle_showmem(int key, struct tty_struct *tty)
+static void sysrq_handle_showmem(int key)
{
show_mem();
}
}
}
-static void sysrq_handle_term(int key, struct tty_struct *tty)
+static void sysrq_handle_term(int key)
{
send_sig_all(SIGTERM);
console_loglevel = 8;
static DECLARE_WORK(moom_work, moom_callback);
-static void sysrq_handle_moom(int key, struct tty_struct *tty)
+static void sysrq_handle_moom(int key)
{
schedule_work(&moom_work);
}
};
#ifdef CONFIG_BLOCK
-static void sysrq_handle_thaw(int key, struct tty_struct *tty)
+static void sysrq_handle_thaw(int key)
{
emergency_thaw_all();
}
};
#endif
-static void sysrq_handle_kill(int key, struct tty_struct *tty)
+static void sysrq_handle_kill(int key)
{
send_sig_all(SIGKILL);
console_loglevel = 8;
.enable_mask = SYSRQ_ENABLE_SIGNAL,
};
-static void sysrq_handle_unrt(int key, struct tty_struct *tty)
+static void sysrq_handle_unrt(int key)
{
normalize_rt_tasks();
}
sysrq_key_table[i] = op_p;
}
-void __handle_sysrq(int key, struct tty_struct *tty, int check_mask)
+void __handle_sysrq(int key, bool check_mask)
{
struct sysrq_key_op *op_p;
int orig_log_level;
if (!check_mask || sysrq_on_mask(op_p->enable_mask)) {
printk("%s\n", op_p->action_msg);
console_loglevel = orig_log_level;
- op_p->handler(key, tty);
+ op_p->handler(key);
} else {
printk("This sysrq operation is disabled.\n");
}
spin_unlock_irqrestore(&sysrq_key_table_lock, flags);
}
-void handle_sysrq(int key, struct tty_struct *tty)
+void handle_sysrq(int key)
{
if (sysrq_on())
- __handle_sysrq(key, tty, 1);
+ __handle_sysrq(key, true);
}
EXPORT_SYMBOL(handle_sysrq);
default:
if (sysrq_down && value && value != 2)
- __handle_sysrq(sysrq_xlate[code], NULL, 1);
+ __handle_sysrq(sysrq_xlate[code], true);
break;
}
if (get_user(c, buf))
return -EFAULT;
- __handle_sysrq(c, NULL, 0);
+ __handle_sysrq(c, false);
}
return count;
amd64_handle_ce(mci, info);
else if (ecc_type == 1)
amd64_handle_ue(mci, info);
-
- /*
- * If main error is CE then overflow must be CE. If main error is UE
- * then overflow is unknown. We'll call the overflow a CE - if
- * panic_on_ue is set then we're already panic'ed and won't arrive
- * here. Else, then apparently someone doesn't think that UE's are
- * catastrophic.
- */
- if (info->nbsh & K8_NBSH_OVERFLOW)
- edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR " Error Overflow");
}
void amd64_decode_bus_error(int node_id, struct err_regs *regs)
pr_emerg("MC%d_STATUS: ", m->bank);
- pr_cont("%sorrected error, report: %s, MiscV: %svalid, "
+ pr_cont("%sorrected error, other errors lost: %s, "
"CPU context corrupt: %s",
((m->status & MCI_STATUS_UC) ? "Unc" : "C"),
- ((m->status & MCI_STATUS_EN) ? "yes" : "no"),
- ((m->status & MCI_STATUS_MISCV) ? "" : "in"),
+ ((m->status & MCI_STATUS_OVER) ? "yes" : "no"),
((m->status & MCI_STATUS_PCC) ? "yes" : "no"));
/* do the two bits[14:13] together */
static int __init mce_amd_init(void)
{
/*
- * We can decode MCEs for Opteron and later CPUs:
+ * We can decode MCEs for K8, F10h and F11h CPUs:
*/
- if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
- (boot_cpu_data.x86 >= 0xf))
- atomic_notifier_chain_register(&x86_mce_decoder_chain, &amd_mce_dec_nb);
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ return 0;
+
+ if (boot_cpu_data.x86 < 0xf || boot_cpu_data.x86 > 0x11)
+ return 0;
+
+ atomic_notifier_chain_register(&x86_mce_decoder_chain, &amd_mce_dec_nb);
return 0;
}
}
static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
-static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
+static void drm_fb_helper_sysrq(int dummy1)
{
schedule_work(&drm_fb_helper_restore_work);
}
if (absdev) {
val = lo + (hi << 8);
#ifdef TABLET_AUTOADJUST
- if (val < input_abs_min(dev, ABS_X + i))
+ if (val < input_abs_get_min(dev, ABS_X + i))
input_abs_set_min(dev, ABS_X + i, val);
- if (val > input_abs_max(dev, ABS_X + i))
+ if (val > input_abs_get_max(dev, ABS_X + i))
input_abs_set_max(dev, ABS_X + i, val);
#endif
if (i % 3)
- val = input_abs_max(dev, ABS_X + i) - val;
+ val = input_abs_get_max(dev, ABS_X + i) - val;
input_report_abs(dev, ABS_X + i, val);
} else {
val = (int) (((int8_t) lo) | ((int8_t) hi << 8));
#ifdef TABLET_AUTOADJUST
for (i = 0; i < ABS_MAX; i++) {
- int diff = input_abs_max(input_dev, ABS_X + i) / 10;
+ int diff = input_abs_get_max(input_dev, ABS_X + i) / 10;
input_abs_set_min(input_dev, ABS_X + i,
- input_abs_min(input_dev, ABS_X + i) + diff)
+ input_abs_get_min(input_dev, ABS_X + i) + diff);
input_abs_set_max(input_dev, ABS_X + i,
- input_abs_max(input_dev, ABS_X + i) - diff)
+ input_abs_get_max(input_dev, ABS_X + i) - diff);
}
#endif
clk_put(keypad->clk);
input_unregister_device(keypad->input_dev);
- input_free_device(keypad->input_dev);
-
iounmap(keypad->mmio_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
.minor = UINPUT_MINOR,
.name = UINPUT_NAME,
};
+MODULE_ALIAS_MISCDEV(UINPUT_MINOR);
+MODULE_ALIAS("devname:" UINPUT_NAME);
static int __init uinput_init(void)
{
fx(0) = value;
if (mousedev->touch && mousedev->pkt_count >= 2) {
- size = input_abs_get_min(dev, ABS_X) -
- input_abs_get_max(dev, ABS_X);
+ size = input_abs_get_max(dev, ABS_X) -
+ input_abs_get_min(dev, ABS_X);
if (size == 0)
size = 256 * 2;
fy(0) = value;
if (mousedev->touch && mousedev->pkt_count >= 2) {
/* use X size for ABS_Y to keep the same scale */
- size = input_abs_get_min(dev, ABS_X) -
- input_abs_get_max(dev, ABS_X);
+ size = input_abs_get_max(dev, ABS_X) -
+ input_abs_get_min(dev, ABS_X);
if (size == 0)
size = 256 * 2;
}
#if defined(CONFIG_MAGIC_SYSRQ)
-static void emac_sysrq_handler(int key, struct tty_struct *tty)
+static void emac_sysrq_handler(int key)
{
emac_dbg_dump_all();
}
#ifdef CONFIG_MAGIC_SYSRQ
static int ctrlchar_sysrq_key;
-static struct tty_struct *sysrq_tty;
static void
ctrlchar_handle_sysrq(struct work_struct *work)
{
- handle_sysrq(ctrlchar_sysrq_key, sysrq_tty);
+ handle_sysrq(ctrlchar_sysrq_key);
}
static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq);
/* racy */
if (len == 3 && buf[1] == '-') {
ctrlchar_sysrq_key = buf[2];
- sysrq_tty = tty;
schedule_work(&ctrlchar_work);
return CTRLCHAR_SYSRQ;
}
if (kbd->sysrq) {
if (kbd->sysrq == K(KT_LATIN, '-')) {
kbd->sysrq = 0;
- handle_sysrq(value, kbd->tty);
+ handle_sysrq(value);
return;
}
if (value == '-') {
sysrq_requested = 0;
if (ch && time_before(jiffies, sysrq_timeout)) {
spin_unlock_irqrestore(&port->sc_port.lock, flags);
- handle_sysrq(ch, NULL);
+ handle_sysrq(ch);
spin_lock_irqsave(&port->sc_port.lock, flags);
/* ignore actual sysrq command char */
continue;
if (port->port.console && port->sysrq) {
for (i = 0; i < len; i++, ch++) {
- if (!usb_serial_handle_sysrq_char(tty, port, *ch))
+ if (!usb_serial_handle_sysrq_char(port, *ch))
tty_insert_flip_char(tty, *ch, flag);
}
} else {
tty_insert_flip_string(tty, ch, urb->actual_length);
else {
for (i = 0; i < urb->actual_length; i++, ch++) {
- if (!usb_serial_handle_sysrq_char(tty, port, *ch))
+ if (!usb_serial_handle_sysrq_char(port, *ch))
tty_insert_flip_char(tty, *ch, TTY_NORMAL);
}
}
EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle);
#ifdef CONFIG_MAGIC_SYSRQ
-int usb_serial_handle_sysrq_char(struct tty_struct *tty,
- struct usb_serial_port *port, unsigned int ch)
+int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)
{
if (port->sysrq && port->port.console) {
if (ch && time_before(jiffies, port->sysrq)) {
- handle_sysrq(ch, tty);
+ handle_sysrq(ch);
port->sysrq = 0;
return 1;
}
return 0;
}
#else
-int usb_serial_handle_sysrq_char(struct tty_struct *tty,
- struct usb_serial_port *port, unsigned int ch)
+int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)
{
return 0;
}
if (port->port.console && port->sysrq) {
for (i = 0; i < urb->actual_length; ++i)
- if (!usb_serial_handle_sysrq_char(tty, port, data[i]))
+ if (!usb_serial_handle_sysrq_char(port, data[i]))
tty_insert_flip_char(tty, data[i], tty_flag);
} else {
tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
if (port->port.console && port->sysrq) {
for (i = 0; i < len; i++, ch++) {
- if (!usb_serial_handle_sysrq_char(tty, port, *ch))
+ if (!usb_serial_handle_sysrq_char(port, *ch))
tty_insert_flip_char(tty, *ch, flag);
}
} else
goto again;
if (sysrq_key != '\0')
- handle_sysrq(sysrq_key, NULL);
+ handle_sysrq(sysrq_key);
}
static struct xenbus_watch sysrq_watch = {
/* dirty the head */
spin_lock(&inode->i_lock);
- if (ci->i_wrbuffer_ref_head == 0)
+ if (ci->i_head_snapc == NULL)
ci->i_head_snapc = ceph_get_snap_context(snapc);
++ci->i_wrbuffer_ref_head;
if (ci->i_wrbuffer_ref == 0)
spin_lock_irq(&mapping->tree_lock);
if (page->mapping) { /* Race with truncate? */
WARN_ON_ONCE(!PageUptodate(page));
-
- if (mapping_cap_account_dirty(mapping)) {
- __inc_zone_page_state(page, NR_FILE_DIRTY);
- __inc_bdi_stat(mapping->backing_dev_info,
- BDI_RECLAIMABLE);
- task_io_account_write(PAGE_CACHE_SIZE);
- }
+ account_page_dirtied(page, page->mapping);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
break;
}
}
- if (!snapc && ci->i_head_snapc) {
+ if (!snapc && ci->i_wrbuffer_ref_head) {
snapc = ceph_get_snap_context(ci->i_head_snapc);
dout(" head snapc %p has %d dirty pages\n",
snapc, ci->i_wrbuffer_ref_head);
th = get_ticket_handler(ac, service);
- if (!th) {
+ if (IS_ERR(th)) {
*pneed |= service;
continue;
}
struct ceph_x_ticket_handler *th =
get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
+ if (IS_ERR(th))
+ return PTR_ERR(th);
+
ceph_x_validate_tickets(ac, &need);
dout("build_request want %x have %x need %x\n",
return -ERANGE;
head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);
- BUG_ON(!th);
ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
if (ret)
return ret;
case CEPHX_GET_PRINCIPAL_SESSION_KEY:
th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
- BUG_ON(!th);
+ if (IS_ERR(th))
+ return PTR_ERR(th);
ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
buf + sizeof(*head), end);
break;
void *end = p + sizeof(au->reply_buf);
th = get_ticket_handler(ac, au->service);
- if (!th)
- return -EIO; /* hrm! */
+ if (IS_ERR(th))
+ return PTR_ERR(th);
ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));
if (ret < 0)
return ret;
struct ceph_x_ticket_handler *th;
th = get_ticket_handler(ac, peer_type);
- if (th && !IS_ERR(th))
+ if (!IS_ERR(th))
remove_ticket_handler(ac, th);
}
gid_t gid;
struct ceph_mds_session *session;
u64 xattr_version = 0;
+ struct ceph_buffer *xattr_blob = NULL;
int delayed = 0;
u64 flush_tid = 0;
int i;
for (i = 0; i < CEPH_CAP_BITS; i++)
if (flushing & (1 << i))
ci->i_cap_flush_tid[i] = flush_tid;
+
+ follows = ci->i_head_snapc->seq;
+ } else {
+ follows = 0;
}
keep = cap->implemented;
mtime = inode->i_mtime;
atime = inode->i_atime;
time_warp_seq = ci->i_time_warp_seq;
- follows = ci->i_snap_realm->cached_context->seq;
uid = inode->i_uid;
gid = inode->i_gid;
mode = inode->i_mode;
- if (dropping & CEPH_CAP_XATTR_EXCL) {
+ if (flushing & CEPH_CAP_XATTR_EXCL) {
__ceph_build_xattrs_blob(ci);
- xattr_version = ci->i_xattrs.version + 1;
+ xattr_blob = ci->i_xattrs.blob;
+ xattr_version = ci->i_xattrs.version;
}
spin_unlock(&inode->i_lock);
ret = send_cap_msg(session, ceph_vino(inode).ino, cap_id,
op, keep, want, flushing, seq, flush_tid, issue_seq, mseq,
size, max_size, &mtime, &atime, time_warp_seq,
- uid, gid, mode,
- xattr_version,
- (flushing & CEPH_CAP_XATTR_EXCL) ? ci->i_xattrs.blob : NULL,
+ uid, gid, mode, xattr_version, xattr_blob,
follows);
if (ret < 0) {
dout("error sending cap msg, must requeue %p\n", inode);
&capsnap->mtime, &capsnap->atime,
capsnap->time_warp_seq,
capsnap->uid, capsnap->gid, capsnap->mode,
- 0, NULL,
+ capsnap->xattr_version, capsnap->xattr_blob,
capsnap->follows);
next_follows = capsnap->follows + 1;
ceph_cap_string(was | mask));
ci->i_dirty_caps |= mask;
if (was == 0) {
- dout(" inode %p now dirty\n", &ci->vfs_inode);
+ if (!ci->i_head_snapc)
+ ci->i_head_snapc = ceph_get_snap_context(
+ ci->i_snap_realm->cached_context);
+ dout(" inode %p now dirty snapc %p\n", &ci->vfs_inode,
+ ci->i_head_snapc);
BUG_ON(!list_empty(&ci->i_dirty_item));
spin_lock(&mdsc->cap_dirty_lock);
list_add(&ci->i_dirty_item, &mdsc->cap_dirty);
if (ci->i_head_snapc == snapc) {
ci->i_wrbuffer_ref_head -= nr;
- if (!ci->i_wrbuffer_ref_head) {
+ if (ci->i_wrbuffer_ref_head == 0 &&
+ ci->i_dirty_caps == 0 && ci->i_flushing_caps == 0) {
+ BUG_ON(!ci->i_head_snapc);
ceph_put_snap_context(ci->i_head_snapc);
ci->i_head_snapc = NULL;
}
dout(" inode %p now clean\n", inode);
BUG_ON(!list_empty(&ci->i_dirty_item));
drop = 1;
+ if (ci->i_wrbuffer_ref_head == 0) {
+ BUG_ON(!ci->i_head_snapc);
+ ceph_put_snap_context(ci->i_head_snapc);
+ ci->i_head_snapc = NULL;
+ }
} else {
BUG_ON(list_empty(&ci->i_dirty_item));
}
} else if (req->r_dentry) {
path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
&pathbase, 0);
+ if (IS_ERR(path))
+ path = NULL;
spin_lock(&req->r_dentry->d_lock);
seq_printf(s, " #%llx/%.*s (%s)",
ceph_ino(req->r_dentry->d_parent->d_inode),
if (req->r_old_dentry) {
path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
&pathbase, 0);
+ if (IS_ERR(path))
+ path = NULL;
spin_lock(&req->r_old_dentry->d_lock);
seq_printf(s, " #%llx/%.*s (%s)",
ceph_ino(req->r_old_dentry->d_parent->d_inode),
else
dentry->d_op = &ceph_snap_dentry_ops;
- di = kmem_cache_alloc(ceph_dentry_cachep, GFP_NOFS);
+ di = kmem_cache_alloc(ceph_dentry_cachep, GFP_NOFS | __GFP_ZERO);
if (!di)
return -ENOMEM; /* oh well */
if (ci->i_files == 0 && ci->i_subdirs == 0 &&
ceph_snap(inode) == CEPH_NOSNAP &&
(le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
+ (issued & CEPH_CAP_FILE_EXCL) == 0 &&
(ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
dout(" marking %p complete (empty)\n", inode);
ci->i_ceph_flags |= CEPH_I_COMPLETE;
in = dn->d_inode;
} else {
in = ceph_get_inode(parent->d_sb, vino);
- if (in == NULL) {
+ if (IS_ERR(in)) {
dout("new_inode badness\n");
d_delete(dn);
dput(dn);
- err = -ENOMEM;
+ err = PTR_ERR(in);
goto out;
}
dn = splice_dentry(dn, in, NULL);
length = fl->fl_end - fl->fl_start + 1;
err = ceph_lock_message(CEPH_LOCK_FCNTL, op, file,
- (u64)fl->fl_pid, (u64)fl->fl_nspid,
+ (u64)fl->fl_pid,
+ (u64)(unsigned long)fl->fl_nspid,
lock_cmd, fl->fl_start,
length, wait);
if (!err) {
/* undo! This should only happen if the kernel detects
* local deadlock. */
ceph_lock_message(CEPH_LOCK_FCNTL, op, file,
- (u64)fl->fl_pid, (u64)fl->fl_nspid,
+ (u64)fl->fl_pid,
+ (u64)(unsigned long)fl->fl_nspid,
CEPH_LOCK_UNLOCK, fl->fl_start,
length, 0);
dout("got %d on posix_lock_file, undid lock", err);
length = fl->fl_end - fl->fl_start + 1;
err = ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK,
- file, (u64)fl->fl_pid, (u64)fl->fl_nspid,
+ file, (u64)fl->fl_pid,
+ (u64)(unsigned long)fl->fl_nspid,
lock_cmd, fl->fl_start,
length, wait);
if (!err) {
ceph_lock_message(CEPH_LOCK_FLOCK,
CEPH_MDS_OP_SETFILELOCK,
file, (u64)fl->fl_pid,
- (u64)fl->fl_nspid,
+ (u64)(unsigned long)fl->fl_nspid,
CEPH_LOCK_UNLOCK, fl->fl_start,
length, 0);
dout("got %d on flock_lock_file_wait, undid lock", err);
cephlock->length = cpu_to_le64(lock->fl_end - lock->fl_start + 1);
cephlock->client = cpu_to_le64(0);
cephlock->pid = cpu_to_le64(lock->fl_pid);
- cephlock->pid_namespace = cpu_to_le64((u64)lock->fl_nspid);
+ cephlock->pid_namespace =
+ cpu_to_le64((u64)(unsigned long)lock->fl_nspid);
switch (lock->fl_type) {
case F_RDLCK:
*
* Called under mdsc->mutex.
*/
+struct dentry *get_nonsnap_parent(struct dentry *dentry)
+{
+ while (!IS_ROOT(dentry) && ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
+ dentry = dentry->d_parent;
+ return dentry;
+}
+
static int __choose_mds(struct ceph_mds_client *mdsc,
struct ceph_mds_request *req)
{
if (req->r_inode) {
inode = req->r_inode;
} else if (req->r_dentry) {
- if (req->r_dentry->d_inode) {
+ struct inode *dir = req->r_dentry->d_parent->d_inode;
+
+ if (dir->i_sb != mdsc->client->sb) {
+ /* not this fs! */
+ inode = req->r_dentry->d_inode;
+ } else if (ceph_snap(dir) != CEPH_NOSNAP) {
+ /* direct snapped/virtual snapdir requests
+ * based on parent dir inode */
+ struct dentry *dn =
+ get_nonsnap_parent(req->r_dentry->d_parent);
+ inode = dn->d_inode;
+ dout("__choose_mds using nonsnap parent %p\n", inode);
+ } else if (req->r_dentry->d_inode) {
+ /* dentry target */
inode = req->r_dentry->d_inode;
} else {
- inode = req->r_dentry->d_parent->d_inode;
+ /* dir + name */
+ inode = dir;
hash = req->r_dentry->d_name.hash;
is_hash = true;
}
}
+
dout("__choose_mds %p is_hash=%d (%d) mode %d\n", inode, (int)is_hash,
(int)hash, mode);
if (!inode)
pr_info("mds%d reconnect denied\n", session->s_mds);
remove_session_caps(session);
wake = 1; /* for good measure */
- complete_all(&mdsc->session_close_waiters);
+ wake_up_all(&mdsc->session_close_wq);
kick_requests(mdsc, mds);
break;
path = ceph_mdsc_build_path(dentry, &pathlen, &pathbase, 0);
if (IS_ERR(path)) {
err = PTR_ERR(path);
- BUG_ON(err);
+ goto out_dput;
}
} else {
path = NULL;
}
err = ceph_pagelist_encode_string(pagelist, path, pathlen);
if (err)
- goto out;
+ goto out_free;
spin_lock(&inode->i_lock);
cap->seq = 0; /* reset cap seq */
unlock_kernel();
}
-out:
+out_free:
kfree(path);
+out_dput:
dput(dentry);
return err;
}
return -ENOMEM;
init_completion(&mdsc->safe_umount_waiters);
- init_completion(&mdsc->session_close_waiters);
+ init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
mdsc->sessions = NULL;
mdsc->max_sessions = 0;
wait_event(mdsc->cap_flushing_wq, check_cap_flush(mdsc, want_flush));
}
+/*
+ * true if all sessions are closed, or we force unmount
+ */
+bool done_closing_sessions(struct ceph_mds_client *mdsc)
+{
+ int i, n = 0;
+
+ if (mdsc->client->mount_state == CEPH_MOUNT_SHUTDOWN)
+ return true;
+
+ mutex_lock(&mdsc->mutex);
+ for (i = 0; i < mdsc->max_sessions; i++)
+ if (mdsc->sessions[i])
+ n++;
+ mutex_unlock(&mdsc->mutex);
+ return n == 0;
+}
/*
* called after sb is ro.
{
struct ceph_mds_session *session;
int i;
- int n;
struct ceph_client *client = mdsc->client;
- unsigned long started, timeout = client->mount_args->mount_timeout * HZ;
+ unsigned long timeout = client->mount_args->mount_timeout * HZ;
dout("close_sessions\n");
- mutex_lock(&mdsc->mutex);
-
/* close sessions */
- started = jiffies;
- while (time_before(jiffies, started + timeout)) {
- dout("closing sessions\n");
- n = 0;
- for (i = 0; i < mdsc->max_sessions; i++) {
- session = __ceph_lookup_mds_session(mdsc, i);
- if (!session)
- continue;
- mutex_unlock(&mdsc->mutex);
- mutex_lock(&session->s_mutex);
- __close_session(mdsc, session);
- mutex_unlock(&session->s_mutex);
- ceph_put_mds_session(session);
- mutex_lock(&mdsc->mutex);
- n++;
- }
- if (n == 0)
- break;
-
- if (client->mount_state == CEPH_MOUNT_SHUTDOWN)
- break;
-
- dout("waiting for sessions to close\n");
+ mutex_lock(&mdsc->mutex);
+ for (i = 0; i < mdsc->max_sessions; i++) {
+ session = __ceph_lookup_mds_session(mdsc, i);
+ if (!session)
+ continue;
mutex_unlock(&mdsc->mutex);
- wait_for_completion_timeout(&mdsc->session_close_waiters,
- timeout);
+ mutex_lock(&session->s_mutex);
+ __close_session(mdsc, session);
+ mutex_unlock(&session->s_mutex);
+ ceph_put_mds_session(session);
mutex_lock(&mdsc->mutex);
}
+ mutex_unlock(&mdsc->mutex);
+
+ dout("waiting for sessions to close\n");
+ wait_event_timeout(mdsc->session_close_wq, done_closing_sessions(mdsc),
+ timeout);
/* tear down remaining sessions */
+ mutex_lock(&mdsc->mutex);
for (i = 0; i < mdsc->max_sessions; i++) {
if (mdsc->sessions[i]) {
session = get_session(mdsc->sessions[i]);
mutex_lock(&mdsc->mutex);
}
}
-
WARN_ON(!list_empty(&mdsc->cap_delay_list));
-
mutex_unlock(&mdsc->mutex);
ceph_cleanup_empty_realms(mdsc);
struct mutex mutex; /* all nested structures */
struct ceph_mdsmap *mdsmap;
- struct completion safe_umount_waiters, session_close_waiters;
+ struct completion safe_umount_waiters;
+ wait_queue_head_t session_close_wq;
struct list_head waiting_for_map;
struct ceph_mds_session **sessions; /* NULL for mds if no session */
reqhead->reassert_version = req->r_reassert_version;
req->r_stamp = jiffies;
- list_move_tail(&osdc->req_lru, &req->r_req_lru_item);
+ list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
ceph_msg_get(req->r_request); /* send consumes a ref */
ceph_con_send(&req->r_osd->o_con, req->r_request);
{
struct inode *inode = &ci->vfs_inode;
struct ceph_cap_snap *capsnap;
- int used;
+ int used, dirty;
capsnap = kzalloc(sizeof(*capsnap), GFP_NOFS);
if (!capsnap) {
spin_lock(&inode->i_lock);
used = __ceph_caps_used(ci);
+ dirty = __ceph_caps_dirty(ci);
if (__ceph_have_pending_cap_snap(ci)) {
/* there is no point in queuing multiple "pending" cap_snaps,
as no new writes are allowed to start when pending, so any
cap_snap. lucky us. */
dout("queue_cap_snap %p already pending\n", inode);
kfree(capsnap);
- } else if (ci->i_wrbuffer_ref_head || (used & CEPH_CAP_FILE_WR)) {
+ } else if (ci->i_wrbuffer_ref_head || (used & CEPH_CAP_FILE_WR) ||
+ (dirty & (CEPH_CAP_AUTH_EXCL|CEPH_CAP_XATTR_EXCL|
+ CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR))) {
struct ceph_snap_context *snapc = ci->i_head_snapc;
+ dout("queue_cap_snap %p cap_snap %p queuing under %p\n", inode,
+ capsnap, snapc);
igrab(inode);
-
+
atomic_set(&capsnap->nref, 1);
capsnap->ci = ci;
INIT_LIST_HEAD(&capsnap->ci_item);
capsnap->follows = snapc->seq - 1;
capsnap->issued = __ceph_caps_issued(ci, NULL);
- capsnap->dirty = __ceph_caps_dirty(ci);
+ capsnap->dirty = dirty;
capsnap->mode = inode->i_mode;
capsnap->uid = inode->i_uid;
capsnap->gid = inode->i_gid;
- /* fixme? */
- capsnap->xattr_blob = NULL;
- capsnap->xattr_len = 0;
+ if (dirty & CEPH_CAP_XATTR_EXCL) {
+ __ceph_build_xattrs_blob(ci);
+ capsnap->xattr_blob =
+ ceph_buffer_get(ci->i_xattrs.blob);
+ capsnap->xattr_version = ci->i_xattrs.version;
+ } else {
+ capsnap->xattr_blob = NULL;
+ capsnap->xattr_version = 0;
+ }
/* dirty page count moved from _head to this cap_snap;
all subsequent writes page dirties occur _after_ this
capsnap->dirty_pages = ci->i_wrbuffer_ref_head;
ci->i_wrbuffer_ref_head = 0;
capsnap->context = snapc;
- ci->i_head_snapc = NULL;
+ ci->i_head_snapc =
+ ceph_get_snap_context(ci->i_snap_realm->cached_context);
+ dout(" new snapc is %p\n", ci->i_head_snapc);
list_add_tail(&capsnap->ci_item, &ci->i_cap_snaps);
if (used & CEPH_CAP_FILE_WR) {
return 1; /* caller may want to ceph_flush_snaps */
}
+/*
+ * Queue cap_snaps for snap writeback for this realm and its children.
+ * Called under snap_rwsem, so realm topology won't change.
+ */
+static void queue_realm_cap_snaps(struct ceph_snap_realm *realm)
+{
+ struct ceph_inode_info *ci;
+ struct inode *lastinode = NULL;
+ struct ceph_snap_realm *child;
+
+ dout("queue_realm_cap_snaps %p %llx inodes\n", realm, realm->ino);
+
+ spin_lock(&realm->inodes_with_caps_lock);
+ list_for_each_entry(ci, &realm->inodes_with_caps,
+ i_snap_realm_item) {
+ struct inode *inode = igrab(&ci->vfs_inode);
+ if (!inode)
+ continue;
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (lastinode)
+ iput(lastinode);
+ lastinode = inode;
+ ceph_queue_cap_snap(ci);
+ spin_lock(&realm->inodes_with_caps_lock);
+ }
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (lastinode)
+ iput(lastinode);
+
+ dout("queue_realm_cap_snaps %p %llx children\n", realm, realm->ino);
+ list_for_each_entry(child, &realm->children, child_item)
+ queue_realm_cap_snaps(child);
+
+ dout("queue_realm_cap_snaps %p %llx done\n", realm, realm->ino);
+}
/*
* Parse and apply a snapblob "snap trace" from the MDS. This specifies
*
* ...unless it's a snap deletion!
*/
- if (!deletion) {
- struct ceph_inode_info *ci;
- struct inode *lastinode = NULL;
-
- spin_lock(&realm->inodes_with_caps_lock);
- list_for_each_entry(ci, &realm->inodes_with_caps,
- i_snap_realm_item) {
- struct inode *inode = igrab(&ci->vfs_inode);
- if (!inode)
- continue;
- spin_unlock(&realm->inodes_with_caps_lock);
- if (lastinode)
- iput(lastinode);
- lastinode = inode;
- ceph_queue_cap_snap(ci);
- spin_lock(&realm->inodes_with_caps_lock);
- }
- spin_unlock(&realm->inodes_with_caps_lock);
- if (lastinode)
- iput(lastinode);
- dout("update_snap_trace cap_snaps queued\n");
- }
-
+ if (!deletion)
+ queue_realm_cap_snaps(realm);
} else {
dout("update_snap_trace %llx %p seq %lld unchanged\n",
realm->ino, realm, realm->seq);
uid_t uid;
gid_t gid;
- void *xattr_blob;
- int xattr_len;
+ struct ceph_buffer *xattr_blob;
u64 xattr_version;
u64 size;
static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
{
- if (atomic_dec_and_test(&capsnap->nref))
+ if (atomic_dec_and_test(&capsnap->nref)) {
+ if (capsnap->xattr_blob)
+ ceph_buffer_put(capsnap->xattr_blob);
kfree(capsnap);
+ }
}
/*
unsigned i_cap_exporting_issued;
struct ceph_cap_reservation i_cap_migration_resv;
struct list_head i_cap_snaps; /* snapped state pending flush to mds */
- struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 */
+ struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
+ dirty|flushing caps */
unsigned i_snap_caps; /* cap bits for snapped files */
int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob;
ci->i_xattrs.prealloc_blob = NULL;
ci->i_xattrs.dirty = false;
+ ci->i_xattrs.version++;
}
}
xid, NULL);
if (!inode)
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(rc);
#ifdef CONFIG_CIFS_FSCACHE
/* populate tcon->resource_id */
struct key *spnego_key = NULL;
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
bool first_time;
- char *ntlmsspblob;
if (ses == NULL)
return -EINVAL;
iov[1].iov_base = &pSMB->req.SecurityBlob[0];
} else if (phase == NtLmAuthenticate) {
int blob_len;
+ char *ntlmsspblob;
+
ntlmsspblob = kmalloc(5 *
sizeof(struct _AUTHENTICATE_MESSAGE),
GFP_KERNEL);
static __be32
nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
{
- u32 op_share_access, new_access;
+ u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK;
+ bool new_access;
__be32 status;
- set_access(&new_access, stp->st_access_bmap);
- new_access = (~new_access) & open->op_share_access & ~NFS4_SHARE_WANT_MASK;
-
+ new_access = !test_bit(op_share_access, &stp->st_access_bmap);
if (new_access) {
- status = nfs4_get_vfs_file(rqstp, fp, cur_fh, new_access);
+ status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access);
if (status)
return status;
}
return status;
}
/* remember the open */
- op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK;
__set_bit(op_share_access, &stp->st_access_bmap);
__set_bit(open->op_share_deny, &stp->st_deny_bmap);
*filpp = find_readable_file(stp->st_file);
else
*filpp = find_writeable_file(stp->st_file);
- BUG_ON(!*filpp); /* assured by check_openmode */
}
}
status = nfs_ok;
struct nfs4_stateowner *open_sop = NULL;
struct nfs4_stateowner *lock_sop = NULL;
struct nfs4_stateid *lock_stp;
- struct file *filp;
+ struct nfs4_file *fp;
+ struct file *filp = NULL;
struct file_lock file_lock;
struct file_lock conflock;
__be32 status = 0;
* lock stateid.
*/
struct nfs4_stateid *open_stp = NULL;
- struct nfs4_file *fp;
status = nfserr_stale_clientid;
if (!nfsd4_has_session(cstate) &&
if (status)
goto out;
lock_sop = lock->lk_replay_owner;
+ fp = lock_stp->st_file;
}
/* lock->lk_replay_owner and lock_stp have been created or found */
switch (lock->lk_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
- filp = find_readable_file(lock_stp->st_file);
+ if (find_readable_file(lock_stp->st_file)) {
+ nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ);
+ filp = find_readable_file(lock_stp->st_file);
+ }
file_lock.fl_type = F_RDLCK;
cmd = F_SETLK;
break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
- filp = find_writeable_file(lock_stp->st_file);
+ if (find_writeable_file(lock_stp->st_file)) {
+ nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE);
+ filp = find_writeable_file(lock_stp->st_file);
+ }
file_lock.fl_type = F_WRLCK;
cmd = F_SETLK;
break;
* at all? */
static inline struct file *find_writeable_file(struct nfs4_file *f)
{
- if (f->fi_fds[O_RDWR])
- return f->fi_fds[O_RDWR];
- return f->fi_fds[O_WRONLY];
+ if (f->fi_fds[O_WRONLY])
+ return f->fi_fds[O_WRONLY];
+ return f->fi_fds[O_RDWR];
}
static inline struct file *find_readable_file(struct nfs4_file *f)
{
- if (f->fi_fds[O_RDWR])
- return f->fi_fds[O_RDWR];
- return f->fi_fds[O_RDONLY];
+ if (f->fi_fds[O_RDONLY])
+ return f->fi_fds[O_RDONLY];
+ return f->fi_fds[O_RDWR];
}
static inline struct file *find_any_file(struct nfs4_file *f)
{
if (f->fi_fds[O_RDWR])
return f->fi_fds[O_RDWR];
- else if (f->fi_fds[O_RDWR])
+ else if (f->fi_fds[O_WRONLY])
return f->fi_fds[O_WRONLY];
else
return f->fi_fds[O_RDONLY];
__be32
nfsd_statfs(struct svc_rqst *rqstp, struct svc_fh *fhp, struct kstatfs *stat, int access)
{
- struct path path = {
- .mnt = fhp->fh_export->ex_path.mnt,
- .dentry = fhp->fh_dentry,
- };
__be32 err;
err = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP | access);
- if (!err && vfs_statfs(&path, stat))
- err = nfserr_io;
+ if (!err) {
+ struct path path = {
+ .mnt = fhp->fh_export->ex_path.mnt,
+ .dentry = fhp->fh_dentry,
+ };
+ if (vfs_statfs(&path, stat))
+ err = nfserr_io;
+ }
return err;
}
#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
#define MPT_MINOR 220
#define MPT2SAS_MINOR 221
+#define UINPUT_MINOR 223
#define HPET_MINOR 228
#define FUSE_MINOR 229
#define KVM_MINOR 232
return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
}
+#ifdef CONFIG_MMU
pgprot_t vm_get_page_prot(unsigned long vm_flags);
+#else
+static inline pgprot_t vm_get_page_prot(unsigned long vm_flags)
+{
+ return __pgprot(0);
+}
+#endif
+
struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);
int remap_pfn_range(struct vm_area_struct *, unsigned long addr,
unsigned long pfn, unsigned long size, pgprot_t);
#ifdef SUPPORT_SYSRQ
if (port->sysrq) {
if (ch && time_before(jiffies, port->sysrq)) {
- handle_sysrq(ch, port->state->port.tty);
+ handle_sysrq(ch);
port->sysrq = 0;
return 1;
}
#define _LINUX_SYSRQ_H
#include <linux/errno.h>
-
-struct pt_regs;
-struct tty_struct;
+#include <linux/types.h>
/* Possible values of bitmask for enabling sysrq functions */
/* 0x0001 is reserved for enable everything */
#define SYSRQ_ENABLE_RTNICE 0x0100
struct sysrq_key_op {
- void (*handler)(int, struct tty_struct *);
+ void (*handler)(int);
char *help_msg;
char *action_msg;
int enable_mask;
* are available -- else NULL's).
*/
-void handle_sysrq(int key, struct tty_struct *tty);
-void __handle_sysrq(int key, struct tty_struct *tty, int check_mask);
+void handle_sysrq(int key);
+void __handle_sysrq(int key, bool check_mask);
int register_sysrq_key(int key, struct sysrq_key_op *op);
int unregister_sysrq_key(int key, struct sysrq_key_op *op);
struct sysrq_key_op *__sysrq_get_key_op(int key);
#else
-static inline void handle_sysrq(int key, struct tty_struct *tty)
+static inline void handle_sysrq(int key)
+{
+}
+
+static inline void __handle_sysrq(int key, bool check_mask)
{
}
#define UINPUT_VERSION 3
#ifdef __KERNEL__
-#define UINPUT_MINOR 223
#define UINPUT_NAME "uinput"
#define UINPUT_BUFFER_SIZE 16
#define UINPUT_NUM_REQUESTS 16
extern void usb_serial_generic_process_read_urb(struct urb *urb);
extern int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,
void *dest, size_t size);
-extern int usb_serial_handle_sysrq_char(struct tty_struct *tty,
- struct usb_serial_port *port,
+extern int usb_serial_handle_sysrq_char(struct usb_serial_port *port,
unsigned int ch);
extern int usb_serial_handle_break(struct usb_serial_port *port);
};
#ifdef CONFIG_MAGIC_SYSRQ
-static void sysrq_handle_dbg(int key, struct tty_struct *tty)
+static void sysrq_handle_dbg(int key)
{
if (!dbg_io_ops) {
printk(KERN_CRIT "ERROR: No KGDB I/O module available\n");
if (argc != 1)
return KDB_ARGCOUNT;
kdb_trap_printk++;
- __handle_sysrq(*argv[1], NULL, 0);
+ __handle_sysrq(*argv[1], false);
kdb_trap_printk--;
return 0;
/**
* pm_qos_add_request - inserts new qos request into the list
- * @pm_qos_class: identifies which list of qos request to us
+ * @dep: pointer to a preallocated handle
+ * @pm_qos_class: identifies which list of qos request to use
* @value: defines the qos request
*
* This function inserts a new entry in the pm_qos_class list of requested qos
* performance characteristics. It recomputes the aggregate QoS expectations
- * for the pm_qos_class of parameters, and returns the pm_qos_request list
- * element as a handle for use in updating and removal. Call needs to save
- * this handle for later use.
+ * for the pm_qos_class of parameters and initializes the pm_qos_request_list
+ * handle. Caller needs to save this handle for later use in updates and
+ * removal.
*/
+
void pm_qos_add_request(struct pm_qos_request_list *dep,
int pm_qos_class, s32 value)
{
pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
if (pm_qos_class >= 0) {
- struct pm_qos_request_list *req = kzalloc(GFP_KERNEL, sizeof(*req));
+ struct pm_qos_request_list *req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;
static DECLARE_WORK(poweroff_work, do_poweroff);
-static void handle_poweroff(int key, struct tty_struct *tty)
+static void handle_poweroff(int key)
{
/* run sysrq poweroff on boot cpu */
schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
task_io_account_write(PAGE_CACHE_SIZE);
}
}
+EXPORT_SYMBOL(account_page_dirtied);
/*
* For address_spaces which do not use buffers. Just tag the page as dirty in
*/
struct anon_vma *page_lock_anon_vma(struct page *page)
{
- struct anon_vma *anon_vma;
+ struct anon_vma *anon_vma, *root_anon_vma;
unsigned long anon_mapping;
rcu_read_lock();
goto out;
anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON);
- anon_vma_lock(anon_vma);
- return anon_vma;
+ root_anon_vma = ACCESS_ONCE(anon_vma->root);
+ spin_lock(&root_anon_vma->lock);
+
+ /*
+ * If this page is still mapped, then its anon_vma cannot have been
+ * freed. But if it has been unmapped, we have no security against
+ * the anon_vma structure being freed and reused (for another anon_vma:
+ * SLAB_DESTROY_BY_RCU guarantees that - so the spin_lock above cannot
+ * corrupt): with anon_vma_prepare() or anon_vma_fork() redirecting
+ * anon_vma->root before page_unlock_anon_vma() is called to unlock.
+ */
+ if (page_mapped(page))
+ return anon_vma;
+
+ spin_unlock(&root_anon_vma->lock);
out:
rcu_read_unlock();
return NULL;
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff