[S390] sclp: avoid 64 bit division

[net-next-2.6.git] / drivers / s390 / char / sclp_cmd.c

diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index fc7ae05ce48ae262374b0becc3373a1b42d00690..4b60ede07f0e0f9738d22c70d53c3393eff1b37e 100644 (file)
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -308,6 +308,13 @@ struct assign_storage_sccb {
        u16 rn;
 } __packed;
 
+int arch_get_memory_phys_device(unsigned long start_pfn)
+{
+       if (!rzm)
+               return 0;
+       return PFN_PHYS(start_pfn) >> ilog2(rzm);
+}
+
 static unsigned long long rn2addr(u16 rn)
 {
        return (unsigned long long) (rn - 1) * rzm;
@@ -704,13 +711,6 @@ int sclp_chp_deconfigure(struct chp_id chpid)
        return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
 }
 
-int arch_get_memory_phys_device(unsigned long start_pfn)
-{
-       if (!rzm)
-               return 0;
-       return PFN_PHYS(start_pfn) / rzm;
-}
-
 struct chp_info_sccb {
        struct sccb_header header;
        u8 recognized[SCLP_CHP_INFO_MASK_SIZE];