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authorMichal Hocko <mhocko@suse.com>2015-11-07 03:28:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-07 04:50:42 +0300
commitc62d25556be6c965dc14288e796a576e8e39a7e9 (patch)
treed82b41091f4dd8d378e2e2c841c90093da1485e0 /mm
parent89903327607232de32f05100cf03f9390b858e0b (diff)
downloadlinux-c62d25556be6c965dc14288e796a576e8e39a7e9.tar.xz
mm, fs: introduce mapping_gfp_constraint()
There are many places which use mapping_gfp_mask to restrict a more generic gfp mask which would be used for allocations which are not directly related to the page cache but they are performed in the same context. Let's introduce a helper function which makes the restriction explicit and easier to track. This patch doesn't introduce any functional changes. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Michal Hocko <mhocko@suse.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> 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/filemap.c4
-rw-r--r--mm/readahead.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 6ef3674c0763..1bb007624b53 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1722,7 +1722,7 @@ no_cached_page:
goto out;
}
error = add_to_page_cache_lru(page, mapping, index,
- GFP_KERNEL & mapping_gfp_mask(mapping));
+ mapping_gfp_constraint(mapping, GFP_KERNEL));
if (error) {
page_cache_release(page);
if (error == -EEXIST) {
@@ -1824,7 +1824,7 @@ static int page_cache_read(struct file *file, pgoff_t offset)
return -ENOMEM;
ret = add_to_page_cache_lru(page, mapping, offset,
- GFP_KERNEL & mapping_gfp_mask(mapping));
+ mapping_gfp_constraint(mapping, GFP_KERNEL));
if (ret == 0)
ret = mapping->a_ops->readpage(file, page);
else if (ret == -EEXIST)
diff --git a/mm/readahead.c b/mm/readahead.c
index 998ad592f408..ba22d7fe0afb 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -90,7 +90,7 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
page = list_to_page(pages);
list_del(&page->lru);
if (add_to_page_cache_lru(page, mapping, page->index,
- GFP_KERNEL & mapping_gfp_mask(mapping))) {
+ mapping_gfp_constraint(mapping, GFP_KERNEL))) {
read_cache_pages_invalidate_page(mapping, page);
continue;
}
@@ -128,7 +128,7 @@ static int read_pages(struct address_space *mapping, struct file *filp,
struct page *page = list_to_page(pages);
list_del(&page->lru);
if (!add_to_page_cache_lru(page, mapping, page->index,
- GFP_KERNEL & mapping_gfp_mask(mapping))) {
+ mapping_gfp_constraint(mapping, GFP_KERNEL))) {
mapping->a_ops->readpage(filp, page);
}
page_cache_release(page);