Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH v9 38/46] x86, mm: use limit_pfn for end pfn | Date | Wed, 28 Nov 2012 13:47:49 -0800 |
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instead of shifting end to get that.
Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> --- arch/x86/mm/init.c | 20 +++++++++++--------- 1 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index dd4e98d..079dce4 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<<PG_LEVEL_2M)); @@ -269,7 +271,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range, /* tail is not big page (2M) alignment */ start_pfn = pfn; - end_pfn = PFN_DOWN(end); + end_pfn = limit_pfn; nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0); /* try to merge same page size and continuous */ -- 1.7.7
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