[patch] signalfd: fix undefined reference to `compat_sys_signalfd4'

[Ingo Molnar]

* Ulrich Drepper <drepper@xxxxxxxxxx> wrote:

> This patch adds the new signalfd4 syscall.  It extends the old 
> signalfd syscall by one parameter which is meant to hold a flag value.  
> In this patch the only flag support is SFD_CLOEXEC which causes the 
> close-on-exec flag for the returned file descriptor to be set.

this patch causes the following build failure on !CONFIG_SIGNALFD:

 arch/x86/ia32/built-in.o: In function `ia32_sys_call_table':
 (.rodata+0xa38): undefined reference to `compat_sys_signalfd4'
 make: *** [.tmp_vmlinux1] Error 1

tested fix below.

	Ingo

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