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| author | Josh Triplett <josh@joshtriplett.org> | 2015-05-15 00:17:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-05-15 02:55:51 +0200 |
| commit | 929aa5b250bfc59aca492d3213c7f3a53e2a5247 (patch) | |
| tree | b469ce806d9096e71fc3b1ef47fb08a2627d4655 /mm/page_isolation.c | |
| parent | kernfs: do not account ino_ida allocations to memcg (diff) | |
| download | linux-929aa5b250bfc59aca492d3213c7f3a53e2a5247.tar.xz linux-929aa5b250bfc59aca492d3213c7f3a53e2a5247.zip | |
uidgid: make uid_valid and gid_valid work with !CONFIG_MULTIUSER
{u,g}id_valid call {u,g}id_eq, which calls __k{u,g}id_val on both
arguments and compares. With !CONFIG_MULTIUSER, __k{u,g}id_val return a
constant 0, which makes {u,g}id_valid always return false. Change
{u,g}id_valid to compare their argument against -1 instead. That produces
identical results in the normal CONFIG_MULTIUSER=y case, but with
!CONFIG_MULTIUSER will make {u,g}id_valid constant-fold into "return
true;" rather than "return false;".
This fixes uses of devpts without CONFIG_MULTIUSER.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>,
Cc: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions