tree cc7ab0c90849be38e200fc6ff6a3a09e3caf0405
parent ed2617585f39dd12fae38c657bba68b9779ea10d
author Roland Dreier <rdreier@cisco.com> 1261158084 -0800
committer Al Viro <viro@zeniv.linux.org.uk> 1261502854 -0500

anonfd: Allow making anon files read-only

It seems a couple places such as arch/ia64/kernel/perfmon.c and
drivers/infiniband/core/uverbs_main.c could use anon_inode_getfile()
instead of a private pseudo-fs + alloc_file(), if only there were a way
to get a read-only file.  So provide this by having anon_inode_getfile()
create a read-only file if we pass O_RDONLY in flags.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>