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authorAndreas Schwab <schwab@linux-m68k.org>2011-12-09 11:35:08 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-12-19 14:41:20 +1100
commit9f5072d4f63f28d30d343573830ac6c85fc0deff (patch)
tree60d0a8dee9620e75c6da87b3ab09813945dec336 /arch/powerpc/include
parent2011b1d0d31ae469c7a075061e03b7d4f5b49ba6 (diff)
powerpc: Fix wrong divisor in usecs_to_cputime
Commit d57af9b (taskstats: use real microsecond granularity for CPU times) renamed msecs_to_cputime to usecs_to_cputime, but failed to update all numbers on the way. This causes nonsensical cpu idle/iowait values to be displayed in /proc/stat (the only user of usecs_to_cputime so far). This also renames __cputime_msec_factor to __cputime_usec_factor, adapting its value and using it directly in cputime_to_usecs instead of doing two multiplications. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Acked-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/cputime.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h
index 1cf20bdfbec..33a35801f7c 100644
--- a/arch/powerpc/include/asm/cputime.h
+++ b/arch/powerpc/include/asm/cputime.h
@@ -126,11 +126,11 @@ static inline u64 cputime64_to_jiffies64(const cputime_t ct)
/*
* Convert cputime <-> microseconds
*/
-extern u64 __cputime_msec_factor;
+extern u64 __cputime_usec_factor;
static inline unsigned long cputime_to_usecs(const cputime_t ct)
{
- return mulhdu(ct, __cputime_msec_factor) * USEC_PER_MSEC;
+ return mulhdu(ct, __cputime_usec_factor);
}
static inline cputime_t usecs_to_cputime(const unsigned long us)
@@ -143,7 +143,7 @@ static inline cputime_t usecs_to_cputime(const unsigned long us)
sec = us / 1000000;
if (ct) {
ct *= tb_ticks_per_sec;
- do_div(ct, 1000);
+ do_div(ct, 1000000);
}
if (sec)
ct += (cputime_t) sec * tb_ticks_per_sec;