From 2ac13462b6d242684996e88a07fbed6dec6af622 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Sun, 18 Dec 2011 01:32:09 +0100 Subject: [PATCH] x86: Use "do { } while(0)" for empty flush_tlb_fix_spurious_fault() macro MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If one builds the kernel with -Wempty-body one gets this warning: mm/memory.c:3432:46: warning: suggest braces around empty body in an ¡if¢ statement [-Wempty-body] due to the fact that 'flush_tlb_fix_spurious_fault' is a macro that can sometimes be defined to nothing. Signed-off-by: Jesper Juhl Cc: Eric Dumazet Cc: linux-mm@kvack.org Cc: Michel Lespinasse Cc: Hugh Dickins Cc: Andrea Arcangeli Cc: KAMEZAWA Hiroyuki Cc: Rik van Riel Cc: Mel Gorman Cc: Johannes Weiner Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1112180128070.21784@swampdragon.chaosbits.net Signed-off-by: Ingo Molnar --- arch/x86/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 18601c86fab1..49afb3f41eb6 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -703,7 +703,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, pte_update(mm, addr, ptep); } -#define flush_tlb_fix_spurious_fault(vma, address) +#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))