RE: [2.6 patch] add -Werror-implicit-function-declaration to CFLAGS

["Luck, Tony" <tony.luck@intel.com>]

> This patch broke (-rc1):
> 
> sparc allnoconfig build
> ia64 allnoconfig build
> ppc64 allnoconfig build

ia64 allnoconfig is (and has been for a while) broken for other reasons.

Almost all of the real configurations still build.  The only error
that adding this turned up was building a generic uniprocessor config.

smp_call_function_single() is used without a prototype by
arch/ia64/sn/kernel/sn2/sn_hwperf.c:sn_hwperf_op_cpu()

This isn't a real error because this function actually does return
an "int", so the complier default is correct (plus the caller doesn't
look at the return value, plus on a UP we'd never be able to get to
this call-site because it is in the "else" !!!).

But I'll fix it anyway.

diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h
index 719ff30..949e3a2 100644
--- a/include/asm-ia64/smp.h
+++ b/include/asm-ia64/smp.h
@@ -133,6 +133,7 @@ #else
 
 #define cpu_logical_id(i)		0
 #define cpu_physical_id(i)		ia64_get_lid()
+#define smp_call_function_single(cpuid, func, info, retry, wait) 0
 
 #endif /* CONFIG_SMP */
 #endif /* _ASM_IA64_SMP_H */

-Tony
-
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