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authorNick Piggin <npiggin@kernel.dk>2011-01-07 01:49:32 -0500
committerNick Piggin <npiggin@kernel.dk>2011-01-07 01:50:21 -0500
commitb7ab39f631f505edc2bbdb86620d5493f995c9da (patch)
tree62be97ebc7fc69ceb601f23312d335ebb8038ee7 /fs/nilfs2
parent2304450783dfde7b0b94ae234edd0dbffa865073 (diff)
fs: dcache scale dentry refcount
Make d_count non-atomic and protect it with d_lock. This allows us to ensure a 0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when we start protecting many other dentry members with d_lock. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index f804d41ec9d3..d36fc7ee615f 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -838,7 +838,7 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno,
838 838
839static int nilfs_tree_was_touched(struct dentry *root_dentry) 839static int nilfs_tree_was_touched(struct dentry *root_dentry)
840{ 840{
841 return atomic_read(&root_dentry->d_count) > 1; 841 return root_dentry->d_count > 1;
842} 842}
843 843
844/** 844/**