From: Jeremiah Mahler Date: Sat, 9 Aug 2014 07:38:33 +0000 (-0700) Subject: x86/mm: Fix sparse 'tlb_single_page_flush_ceiling' warning and make the variable... X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=86426851c38d3fe84dee34d7daa71d26c174d409;p=linux-beck.git x86/mm: Fix sparse 'tlb_single_page_flush_ceiling' warning and make the variable read-mostly A sparse warning is generated about 'tlb_single_page_flush_ceiling' not being declared. arch/x86/mm/tlb.c:177:15: warning: symbol 'tlb_single_page_flush_ceiling' was not declared. Should it be static? Since it isn't used anywhere outside this file, fix the warning by making it static. Also, optimize the use of this variable by adding the __read_mostly directive, as suggested by David Rientjes. Suggested-by: David Rientjes Signed-off-by: Jeremiah Mahler Cc: Dave Hansen Cc: Rik van Riel Cc: Mel Gorman Link: http://lkml.kernel.org/r/1407569913-4035-1-git-send-email-jmmahler@gmail.com Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 98b7976d44af..ee61c36d64f8 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -180,7 +180,7 @@ void flush_tlb_current_task(void) * * This is in units of pages. */ -unsigned long tlb_single_page_flush_ceiling = 33; +static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33; void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, unsigned long end, unsigned long vmflag)