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userns: Use cred->user_ns instead of cred->user->user_ns

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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>
This commit is contained in:
Eric W. Biederman
2011-11-16 23:15:31 -08:00
parent 7e6bd8fadd
commit c4a4d60379
12 changed files with 24 additions and 24 deletions
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2
security/keys/permission.c
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@@ -36,7 +36,7 @@ int key_task_permission(const key_ref_t key_ref, const struct cred *cred,
key = key_ref_to_ptr(key_ref);
if (key->user->user_ns != cred->user->user_ns)
if (key->user->user_ns != cred->user_ns)
goto use_other_perms;
/* use the second 8-bits of permissions for keys the caller owns */