fs: dcache scale d_unhashed

Protect d_unhashed(dentry) condition with d_lock. This means keeping
DCACHE_UNHASHED bit in synch with hash manipulations.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 29a406a77547..5aef1a7f5e4b 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -166,6 +166,9 @@ static void spufs_prune_dir(struct dentry *dir)
                         __d_drop(dentry);
                         spin_unlock(&dentry->d_lock);
                         simple_unlink(dir->d_inode, dentry);
+                        /* XXX: what is dcache_lock protecting here? Other
+                         * filesystems (IB, configfs) release dcache_lock
+                         * before unlink */
                         spin_unlock(&dcache_lock);
                         dput(dentry);
                 } else {