From c62d25556be6c965dc14288e796a576e8e39a7e9 Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Fri, 6 Nov 2015 16:28:49 -0800 Subject: 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 Suggested-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/filemap.c | 4 ++-- mm/readahead.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'mm') 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); -- cgit v1.2.3