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authorEric W. Biederman <ebiederm@xmission.com>2011-11-16 23:15:31 -0800
committerEric W. Biederman <ebiederm@xmission.com>2012-04-07 16:55:51 -0700
commitc4a4d603796c727b9555867571f89483be9c565e (patch)
treeae3b47a7b8b35c866df53cb4b4a051d49a28904a /kernel/signal.c
parent7e6bd8fadd1216f50468f965d0308f45e5109ced (diff)
downloadvexpress-lsk-c4a4d603796c727b9555867571f89483be9c565e.tar.gz
userns: Use cred->user_ns instead of cred->user->user_ns
Optimize performance and prepare for the removal of the user_ns reference from user_struct. Remove the slow long walk through cred->user->user_ns and instead go straight to cred->user_ns. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 17afcaf582d..e2c5d84f2da 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -767,14 +767,14 @@ static int kill_ok_by_cred(struct task_struct *t)
const struct cred *cred = current_cred();
const struct cred *tcred = __task_cred(t);
- if (cred->user->user_ns == tcred->user->user_ns &&
+ if (cred->user_ns == tcred->user_ns &&
(cred->euid == tcred->suid ||
cred->euid == tcred->uid ||
cred->uid == tcred->suid ||
cred->uid == tcred->uid))
return 1;
- if (ns_capable(tcred->user->user_ns, CAP_KILL))
+ if (ns_capable(tcred->user_ns, CAP_KILL))
return 1;
return 0;