The patch titled
time: prevent the loop in timespec_add_ns() from being optimised away
has been removed from the -mm tree. Its filename was
time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: time: prevent the loop in timespec_add_ns() from being optimised away
From: Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx>
Since some architectures don't support __udivdi3().
Signed-off-by: Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: john stultz <johnstul@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/time.h | 4 ++++
1 file changed, 4 insertions(+)
diff -puN include/linux/time.h~time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away include/linux/time.h
--- a/include/linux/time.h~time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away
+++ a/include/linux/time.h
@@ -174,6 +174,10 @@ static inline void timespec_add_ns(struc
{
ns += a->tv_nsec;
while(unlikely(ns >= NSEC_PER_SEC)) {
+ /* The following asm() prevents the compiler from
+ * optimising this loop into a modulo operation. */
+ asm("" : "+r"(ns));
+
ns -= NSEC_PER_SEC;
a->tv_sec++;
}
_
Patches currently in -mm which might be from segher@xxxxxxxxxxxxxxxxxxx are
powerpc-8xx-fix-swap.patch
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