[Compatibilty patch] sigtimedwait

[Zou, Nanhai]

This patch is to fix a bug in sys32_rt_sigtimedwait on IA64, X86_64 and
PPC64.
They do a compare of siginfo.si_code when copying siginfo to userspace
compat_siginfo_t structure.
The compare is wrong because siginfo.si_code is already cast to short at
this moment.

This bug will hang ipctest program in linux-ha heartbeat package.

This patch also merges all 6 32 bit layer sys_rt_sigtimedwait in IA64,
X86_64, PPC64, Sparc64, S390 and MIPS into 1 compat_rt_sigtimedwait.

I have only tested it on X86_64 and IA64.
It looks a bit weird for 
#ifdef  __MIPSEL__ in generic code. 
But I don't have any better idea for this.

Signed-off-by: Zou Nan hai <Nanhai.zou@xxxxxxxxx>
Zou Nan hai

Attachment: compat-sigtimedwait.patch
Description: compat-sigtimedwait.patch