1 files changed, 29 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.24.7/time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch b/meta/recipes-kernel/linux/linux-omap-2.6.24.7/time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch
new file mode 100644
index 0000000000..58cbe7be23
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.24.7/time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch
@@ -0,0 +1,29 @@
+commit 38332cb98772f5ea757e6486bed7ed0381cb5f98
+Author: Segher Boessenkool <segher@kernel.crashing.org>
+Date:   Tue Mar 4 14:59:54 2008 -0800
+
+    time: prevent the loop in timespec_add_ns() from being optimised away
+    
+    Since some architectures don't support __udivdi3().
+    
+    Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
+    Cc: john stultz <johnstul@us.ibm.com>
+    Cc: Ingo Molnar <mingo@elte.hu>
+    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+
+diff --git a/include/linux/time.h b/include/linux/time.h
+index 2091a19..d32ef0a 100644
+--- a/include/linux/time.h
++++ b/include/linux/time.h
+@@ -174,6 +174,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns)
+ {
+        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++;
+        }