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authorShaohua Li <shli@kernel.org>2013-02-22 16:34:35 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:17 -0800
commit9800339b5e0f0e24ab3dac349e0de80d2018832e (patch)
tree7f0cc5d46cbf881729ff3b2d97f425570674c95d /include/linux/mm.h
parent340ef3902cf20cec43cdcd1e72ae5cb518be7328 (diff)
mm: don't inline page_mapping()
According to akpm, this saves 1/2k text and makes things simple for the next patch. Numbers from Minchan: add/remove: 1/0 grow/shrink: 6/22 up/down: 92/-516 (-424) function old new delta page_mapping - 48 +48 do_task_stat 2292 2308 +16 page_remove_rmap 240 248 +8 load_elf_binary 4500 4508 +8 update_queue 532 536 +4 scsi_probe_and_add_lun 2892 2896 +4 lookup_fast 644 648 +4 vcs_read 1040 1036 -4 __ip_route_output_key 1904 1900 -4 ip_route_input_noref 2508 2500 -8 shmem_file_aio_read 784 772 -12 __isolate_lru_page 272 256 -16 shmem_replace_page 708 688 -20 mark_buffer_dirty 228 208 -20 __set_page_dirty_buffers 240 220 -20 __remove_mapping 276 256 -20 update_mmu_cache 500 476 -24 set_page_dirty_balance 92 68 -24 set_page_dirty 172 148 -24 page_evictable 88 64 -24 page_cache_pipe_buf_steal 248 224 -24 clear_page_dirty_for_io 340 316 -24 test_set_page_writeback 400 372 -28 test_clear_page_writeback 516 488 -28 invalidate_inode_page 156 128 -28 page_mkclean 432 400 -32 flush_dcache_page 360 328 -32 __set_page_dirty_nobuffers 324 280 -44 shrink_page_list 2412 2356 -56 Signed-off-by: Shaohua Li <shli@fusionio.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Cc: Hugh Dickins <hughd@google.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h13
1 files changed, 1 insertions, 12 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 473abbda942e..1d4122bf6f27 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -809,18 +809,7 @@ void page_address_init(void);
#define PAGE_MAPPING_KSM 2
#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
-extern struct address_space swapper_space;
-static inline struct address_space *page_mapping(struct page *page)
-{
- struct address_space *mapping = page->mapping;
-
- VM_BUG_ON(PageSlab(page));
- if (unlikely(PageSwapCache(page)))
- mapping = &swapper_space;
- else if ((unsigned long)mapping & PAGE_MAPPING_ANON)
- mapping = NULL;
- return mapping;
-}
+extern struct address_space *page_mapping(struct page *page);
/* Neutral page->mapping pointer to address_space or anon_vma or other */
static inline void *page_rmapping(struct page *page)