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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2013-09-11 14:21:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:31 -0700 |
| commit | d2cf5ad6312ca9913464fac40fb47ba47ad945c4 (patch) | |
| tree | 05590c6fed5ee9b86b65e1c23a899e921faeb040 /mm/util.c | |
| parent | bc4b4448dba660afc8df3790564320302d9709a1 (diff) | |
| download | lwn-d2cf5ad6312ca9913464fac40fb47ba47ad945c4.tar.gz lwn-d2cf5ad6312ca9913464fac40fb47ba47ad945c4.zip | |
swap: clean-up #ifdef in page_mapping()
PageSwapCache() is always false when !CONFIG_SWAP, so compiler
properly discard related code. Therefore, we don't need #ifdef explicitly.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/util.c b/mm/util.c index 7441c41d00f6..eaf63fc2c92f 100644 --- a/mm/util.c +++ b/mm/util.c @@ -388,15 +388,12 @@ struct address_space *page_mapping(struct page *page) struct address_space *mapping = page->mapping; VM_BUG_ON(PageSlab(page)); -#ifdef CONFIG_SWAP if (unlikely(PageSwapCache(page))) { swp_entry_t entry; entry.val = page_private(page); mapping = swap_address_space(entry); - } else -#endif - if ((unsigned long)mapping & PAGE_MAPPING_ANON) + } else if ((unsigned long)mapping & PAGE_MAPPING_ANON) mapping = NULL; return mapping; } |