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authorRoel Kluin <roel.kluin@gmail.com>2009-03-31 18:23:15 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 11:59:13 -0400
commite2f17d9459aeccf4e013e31cbd741d6b1858eec4 (patch)
tree919fb245d700a04d253247e19db0b084454b20cc /mm/hugetlb.c
parentd1d7487173eab8352125cf6cc271940f24254bd4 (diff)
hugetlb: chg cannot become less than 0
chg is unsigned, so it cannot be less than 0. Also, since region_chg returns long, let vma_needs_reservation() forward this to alloc_huge_page(). Store it as long as well. all callers cast it to long anyway. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Adam Litke <agl@us.ibm.com> Cc: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 107da3d809a..28c655ba935 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -918,7 +918,7 @@ static void return_unused_surplus_pages(struct hstate *h,
918 * an instantiated the change should be committed via vma_commit_reservation. 918 * an instantiated the change should be committed via vma_commit_reservation.
919 * No action is required on failure. 919 * No action is required on failure.
920 */ 920 */
921static int vma_needs_reservation(struct hstate *h, 921static long vma_needs_reservation(struct hstate *h,
922 struct vm_area_struct *vma, unsigned long addr) 922 struct vm_area_struct *vma, unsigned long addr)
923{ 923{
924 struct address_space *mapping = vma->vm_file->f_mapping; 924 struct address_space *mapping = vma->vm_file->f_mapping;
@@ -933,7 +933,7 @@ static int vma_needs_reservation(struct hstate *h,
933 return 1; 933 return 1;
934 934
935 } else { 935 } else {
936 int err; 936 long err;
937 pgoff_t idx = vma_hugecache_offset(h, vma, addr); 937 pgoff_t idx = vma_hugecache_offset(h, vma, addr);
938 struct resv_map *reservations = vma_resv_map(vma); 938 struct resv_map *reservations = vma_resv_map(vma);
939 939
@@ -969,7 +969,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
969 struct page *page; 969 struct page *page;
970 struct address_space *mapping = vma->vm_file->f_mapping; 970 struct address_space *mapping = vma->vm_file->f_mapping;
971 struct inode *inode = mapping->host; 971 struct inode *inode = mapping->host;
972 unsigned int chg; 972 long chg;
973 973
974 /* 974 /*
975 * Processes that did not create the mapping will have no reserves and 975 * Processes that did not create the mapping will have no reserves and