tree e4e61bdd16fde1ad932861a23978601c2530f32a
parent e12a4e8a04a9ef84ba645379c56abad1a0ca9dbd
author Al Viro <viro@zeniv.linux.org.uk> 1457459057 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1457929040 -0400

replace d_add_unique() with saner primitive

new primitive: d_exact_alias(dentry, inode).  If there is an unhashed
dentry with the same name/parent and given inode, rehash, grab and
return it.  Otherwise, return NULL.  The only caller of d_add_unique()
switched to d_exact_alias() + d_splice_alias().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>