openwrtv4/target/linux/generic-2.6/patches-2.6.21/32-time_fix_timespec_add_ns.patch
Hauke Mehrtens 343e9ffa20 Add some build fixes for kernel 2.6.21 and the infineon amazon target.
Now it compiles with the new toolchain.
These are mostly backports from mainline linux and newer linux kernels from openwrt.

SVN-Revision: 18345
2009-11-08 21:56:59 +00:00

17 lines
480 B
Diff

time: prevent the loop in timespec_add_ns() from being optimised away
Since some architectures don't support __udivdi3().
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -170,6 +170,10 @@ 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++;
}