tree 118b9f6c708060ea5286d46a879b5efd5c3a4ef7
parent 1bbc55131e59bd099fdc568d3aa0b42634dbd188
author Al Viro <viro@zeniv.linux.org.uk> 1525315342 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1527013684 -0400

proc_lookupfd_common(): don't bother with instantiate unless the file is open

... and take the "check if file is open, pick ->f_mode" into a helper;
tid_fd_revalidate() can use it.

The next patch will get rid of tid_fd_revalidate() calls in instantiate
callbacks.

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