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| author | Zhang Yanfei <zhangyanfei@cn.fujitsu.com> | 2013-02-22 16:35:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:21 -0800 |
| commit | ebec3862fd6eefe8301aa55ed2e30c685d831842 (patch) | |
| tree | dda7828d852e384a382b277be0ec80b21ff38c72 /mm | |
| parent | 1081312f95be1a0fc093556d789e482d3ab0f5b0 (diff) | |
| download | linux-3.10-ebec3862fd6eefe8301aa55ed2e30c685d831842.tar.gz linux-3.10-ebec3862fd6eefe8301aa55ed2e30c685d831842.tar.bz2 linux-3.10-ebec3862fd6eefe8301aa55ed2e30c685d831842.zip | |
mm: fix return type for functions nr_free_*_pages
Currently, the amount of RAM that functions nr_free_*_pages return is
held in unsigned int. But in machines with big memory (exceeding 16TB),
the amount may be incorrect because of overflow, so fix it.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Simon Horman <horms@verge.net.au>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 159f8157777..27614065430 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2813,13 +2813,13 @@ void free_pages_exact(void *virt, size_t size) } EXPORT_SYMBOL(free_pages_exact); -static unsigned int nr_free_zone_pages(int offset) +static unsigned long nr_free_zone_pages(int offset) { struct zoneref *z; struct zone *zone; /* Just pick one node, since fallback list is circular */ - unsigned int sum = 0; + unsigned long sum = 0; struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL); @@ -2836,7 +2836,7 @@ static unsigned int nr_free_zone_pages(int offset) /* * Amount of free RAM allocatable within ZONE_DMA and ZONE_NORMAL */ -unsigned int nr_free_buffer_pages(void) +unsigned long nr_free_buffer_pages(void) { return nr_free_zone_pages(gfp_zone(GFP_USER)); } @@ -2845,7 +2845,7 @@ EXPORT_SYMBOL_GPL(nr_free_buffer_pages); /* * Amount of free RAM allocatable within all zones */ -unsigned int nr_free_pagecache_pages(void) +unsigned long nr_free_pagecache_pages(void) { return nr_free_zone_pages(gfp_zone(GFP_HIGHUSER_MOVABLE)); } |