From 2e8059edb6fc5887e8e022d9e04fba26c9e0abcb Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Fri, 16 Nov 2012 19:39:15 -0800 Subject: [PATCH] x86, mm: use limit_pfn for end pfn instead of shifting end to get that. Signed-off-by: Yinghai Lu Link: http://lkml.kernel.org/r/1353123563-3103-39-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin --- arch/x86/mm/init.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 4bf1c5374928..f410dc6f843e 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -203,10 +203,12 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, unsigned long start, unsigned long end) { - unsigned long start_pfn, end_pfn; + unsigned long start_pfn, end_pfn, limit_pfn; unsigned long pfn; int i; + limit_pfn = PFN_DOWN(end); + /* head if not big page alignment ? */ pfn = start_pfn = PFN_DOWN(start); #ifdef CONFIG_X86_32 @@ -223,8 +225,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, #else /* CONFIG_X86_64 */ end_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE)); #endif - if (end_pfn > PFN_DOWN(end)) - end_pfn = PFN_DOWN(end); + if (end_pfn > limit_pfn) + end_pfn = limit_pfn; if (start_pfn < end_pfn) { nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0); pfn = end_pfn; @@ -233,11 +235,11 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, /* big page (2M) range */ start_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE)); #ifdef CONFIG_X86_32 - end_pfn = PFN_DOWN(round_down(end, PMD_SIZE)); + end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE)); #else /* CONFIG_X86_64 */ end_pfn = round_up(pfn, PFN_DOWN(PUD_SIZE)); - if (end_pfn > PFN_DOWN(round_down(end, PMD_SIZE))) - end_pfn = PFN_DOWN(round_down(end, PMD_SIZE)); + if (end_pfn > round_down(limit_pfn, PFN_DOWN(PMD_SIZE))) + end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE)); #endif if (start_pfn < end_pfn) { @@ -249,7 +251,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, #ifdef CONFIG_X86_64 /* big page (1G) range */ start_pfn = round_up(pfn, PFN_DOWN(PUD_SIZE)); - end_pfn = PFN_DOWN(round_down(end, PUD_SIZE)); + end_pfn = round_down(limit_pfn, PFN_DOWN(PUD_SIZE)); if (start_pfn < end_pfn) { nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, page_size_mask & @@ -259,7 +261,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, /* tail is not big page (1G) alignment */ start_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE)); - end_pfn = PFN_DOWN(round_down(end, PMD_SIZE)); + end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE)); if (start_pfn < end_pfn) { nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, page_size_mask & (1<