tree 447e2df881b2f056608098d3b24ab6d9734ce992
parent 44ba8406d0005400e56c6b6a279a669eb761d1b8
author Al Viro <viro@zeniv.linux.org.uk> 1394808980 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1396408751 -0400

don't bother with {get,put}_write_access() on non-regular files

it's pointless and actually leads to wrong behaviour in at least one
moderately convoluted case (pipe(), close one end, try to get to
another via /proc/*/fd and run into ETXTBUSY).

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