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authorEric W. Biederman <ebiederm@xmission.com>2011-11-17 02:15:31 -0500
committerEric W. Biederman <ebiederm@xmission.com>2012-04-07 19:55:51 -0400
commitc4a4d603796c727b9555867571f89483be9c565e (patch)
treeae3b47a7b8b35c866df53cb4b4a051d49a28904a /kernel/sched/core.c
parent7e6bd8fadd1216f50468f965d0308f45e5109ced (diff)
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/sched/core.c')
-rw-r--r--kernel/sched/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4603b9d8f30a..96bff855b866 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4042,7 +4042,7 @@ static bool check_same_owner(struct task_struct *p)
4042 4042
4043 rcu_read_lock(); 4043 rcu_read_lock();
4044 pcred = __task_cred(p); 4044 pcred = __task_cred(p);
4045 if (cred->user->user_ns == pcred->user->user_ns) 4045 if (cred->user_ns == pcred->user_ns)
4046 match = (cred->euid == pcred->euid || 4046 match = (cred->euid == pcred->euid ||
4047 cred->euid == pcred->uid); 4047 cred->euid == pcred->uid);
4048 else 4048 else