The address range size calculation inside local_flush_tlb_kernel_range()
is being truncated by a too small size variable holder on 64-bit systems.
The truncated size can result in an erroneous tlbsize check that means we
sit spinning inside a loop trying to flush a hige number of TLB entries.
This is for all intents and purposes a system hang. Fix by using an
appropriately sized valiable to hold the size.
[Ralf: Greg's original patch submission identified the issue and fixed one
instance in tlb-r4k.c but there there were several more. For consistency
I also modified tlb-r3k.c even though that file is only used on 32-bit.]
Signed-off-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
int cpu = smp_processor_id();
if (cpu_context(cpu, mm) != 0) {
int cpu = smp_processor_id();
if (cpu_context(cpu, mm) != 0) {
- unsigned long flags;
- int size;
+ unsigned long size, flags;
#ifdef DEBUG_TLB
printk("[tlbrange<%lu,0x%08lx,0x%08lx>]",
#ifdef DEBUG_TLB
printk("[tlbrange<%lu,0x%08lx,0x%08lx>]",
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- unsigned long flags;
- int size;
+ unsigned long size, flags;
#ifdef DEBUG_TLB
printk("[tlbrange<%lu,0x%08lx,0x%08lx>]", start, end);
#ifdef DEBUG_TLB
printk("[tlbrange<%lu,0x%08lx,0x%08lx>]", start, end);
int cpu = smp_processor_id();
if (cpu_context(cpu, mm) != 0) {
int cpu = smp_processor_id();
if (cpu_context(cpu, mm) != 0) {
- unsigned long flags;
- int size;
+ unsigned long size, flags;
ENTER_CRITICAL(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
ENTER_CRITICAL(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- unsigned long flags;
- int size;
+ unsigned long size, flags;
ENTER_CRITICAL(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
ENTER_CRITICAL(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
/* Usable for KV1 addresses only! */
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
/* Usable for KV1 addresses only! */
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- unsigned long flags;
- int size;
+ unsigned long size, flags;
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
size = (size + 1) >> 1;
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
size = (size + 1) >> 1;