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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2015-04-16 12:46:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 09:04:03 -0400
commitead8ecffa3e180202c1096a39f14bbecffb139a1 (patch)
treee62f1c805c06e493bc0810a0951fe9db71352b84 /fs/nilfs2/page.c
parent6fb7a61e98ac311a65bc652a12611d9899994f49 (diff)
downloadlinux-ead8ecffa3e180202c1096a39f14bbecffb139a1.tar.bz2
nilfs2: use set_mask_bits() for operations on buffer state bitmap
nilfs_forget_buffer(), nilfs_clear_dirty_page(), and nilfs_segctor_complete_write() are using a bunch of atomic bit operations against buffer state bitmap. This reduces the number of them by utilizing set_mask_bits() macro. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/page.c')
-rw-r--r--fs/nilfs2/page.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 700ecbcca55d..45d650addd56 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -89,18 +89,16 @@ struct buffer_head *nilfs_grab_buffer(struct inode *inode,
void nilfs_forget_buffer(struct buffer_head *bh)
{
struct page *page = bh->b_page;
+ const unsigned long clear_bits =
+ (1 << BH_Uptodate | 1 << BH_Dirty | 1 << BH_Mapped |
+ 1 << BH_Async_Write | 1 << BH_NILFS_Volatile |
+ 1 << BH_NILFS_Checked | 1 << BH_NILFS_Redirected);
lock_buffer(bh);
- clear_buffer_nilfs_volatile(bh);
- clear_buffer_nilfs_checked(bh);
- clear_buffer_nilfs_redirected(bh);
- clear_buffer_async_write(bh);
- clear_buffer_dirty(bh);
+ set_mask_bits(&bh->b_state, clear_bits, 0);
if (nilfs_page_buffers_clean(page))
__nilfs_clear_page_dirty(page);
- clear_buffer_uptodate(bh);
- clear_buffer_mapped(bh);
bh->b_blocknr = -1;
ClearPageUptodate(page);
ClearPageMappedToDisk(page);
@@ -421,6 +419,10 @@ void nilfs_clear_dirty_page(struct page *page, bool silent)
if (page_has_buffers(page)) {
struct buffer_head *bh, *head;
+ const unsigned long clear_bits =
+ (1 << BH_Uptodate | 1 << BH_Dirty | 1 << BH_Mapped |
+ 1 << BH_Async_Write | 1 << BH_NILFS_Volatile |
+ 1 << BH_NILFS_Checked | 1 << BH_NILFS_Redirected);
bh = head = page_buffers(page);
do {
@@ -430,13 +432,7 @@ void nilfs_clear_dirty_page(struct page *page, bool silent)
"discard block %llu, size %zu",
(u64)bh->b_blocknr, bh->b_size);
}
- clear_buffer_async_write(bh);
- clear_buffer_dirty(bh);
- clear_buffer_nilfs_volatile(bh);
- clear_buffer_nilfs_checked(bh);
- clear_buffer_nilfs_redirected(bh);
- clear_buffer_uptodate(bh);
- clear_buffer_mapped(bh);
+ set_mask_bits(&bh->b_state, clear_bits, 0);
unlock_buffer(bh);
} while (bh = bh->b_this_page, bh != head);
}