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SubjectRe: [PATCH] [POWERPC] Fix CONFIG_SMP=n build error on ppc64
On Sat, Nov 10, 2007 at 02:59:29PM -0600, Olof Johansson wrote:
> [POWERPC] Fix CONFIG_SMP=n build error
> The patch "KVM: fix !SMP build error" change the way smp_call_function()
> actually uses the passed in function names on non-SMP builds. So
> previously it was never caught that the function passed in was never
> actually defined.
> This causes a build error on ppc64_defconfig + CONFIG_SMP=n:
> arch/powerpc/mm/tlb_64.c: In function 'pgtable_free_now':
> arch/powerpc/mm/tlb_64.c:71: error: 'pte_free_smp_sync' undeclared (first use in this function)
> arch/powerpc/mm/tlb_64.c:71: error: (Each undeclared identifier is reported only once
> arch/powerpc/mm/tlb_64.c:71: error: for each function it appears in.)
> So we need to define it even if CONFIG_SMP is off. Either that or ifdef
> out the smp_call_function() call, but that's ugly.

Thanks, the patch fixes the build failure.

Tested-by: Kamalesh Babulal <>
Signed-off-by: Olof Johansson <>

diff --git a/arch/powerpc/mm/tlb_64.c b/arch/powerpc/mm/tlb_64.c
index eafbca5..e2d867c 100644
--- a/arch/powerpc/mm/tlb_64.c
+++ b/arch/powerpc/mm/tlb_64.c
@@ -54,12 +54,10 @@ unsigned long pte_freelist_forced_free;
((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \
/ sizeof(pgtable_free_t))

-#ifdef CONFIG_SMP
static void pte_free_smp_sync(void *arg)
/* Do nothing, just ensure we sync with all CPUs */

/* This is only called when we are critically out of memory
* (and fail to get a page in pte_free_tlb).
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
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