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authorNick Piggin <npiggin@kernel.dk>2011-01-07 09:49:32 +0300
committerNick Piggin <npiggin@kernel.dk>2011-01-07 09:50:21 +0300
commitb7ab39f631f505edc2bbdb86620d5493f995c9da (patch)
tree62be97ebc7fc69ceb601f23312d335ebb8038ee7 /fs/no-block.c
parent2304450783dfde7b0b94ae234edd0dbffa865073 (diff)
downloadlinux-b7ab39f631f505edc2bbdb86620d5493f995c9da.tar.xz
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>
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