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linux-omap: fix build failure with gcc-4.3.3 

Pull time.h patch from upstream Linux kernel
(commit 38332cb98772f5ea757e6486bed7ed0381cb5f98)

The patch fixes the following build failure:
  LD      .tmp_vmlinux1
kernel/built-in.o: In function `timespec_add_ns':
    undefined reference to `__aeabi_uldivmod'
kernel/built-in.o: In function `do_gettimeofday':
    undefined reference to `__aeabi_uldivmod'
    undefined reference to `__aeabi_uldivmod'
kernel/built-in.o: In function `timespec_add_ns':
    undefined reference to `__aeabi_uldivmod'
    undefined reference to `__aeabi_uldivmod'
kernel/built-in.o: more undefined references to `__aeabi_uldivmod'

Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
This commit is contained in:
Dexuan Cui 2010-06-23 13:51:15 +08:00
parent 3ceb99937d
commit a1d913a7fc
2 changed files with 31 additions and 1 deletions
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29
meta/packages/linux/linux-omap-2.6.24.7/time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch vendored Normal file
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@ -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++;
}

3
meta/packages/linux/linux-omap_2.6.24.7.bb
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@ -1,6 +1,6 @@
require linux-omap.inc
PR = "r5"
PR = "r6"
COMPATIBLE_MACHINE = "omap-3430ldp|omap-3430sdp"
DEFAULT_PREFERENCE = "1"
@ -18,6 +18,7 @@ SRC_URI="http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.24.tar.bz2 \
file://fixes.patch;patch=1 \
file://fixes2.patch;patch=1 \
file://module_fix.patch;patch=1 \
file://time-prevent-the-loop-in-timespec_add_ns-from-being-optimised-away.patch;patch=1 \
file://defconfig-${MACHINE}"
S = "${WORKDIR}/linux-2.6.24"