Commits
Al Viro committed 274f5b041d3
dcache_{readdir,dir_lseek}(): don't bother with nested ->d_lock
Make sure that directory is locked shared in dcache_dir_lseek();
for dcache_readdir() it's already tru, and that's enough to make
simple_positive() stable.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>