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tomoyo: use hwight16() in tomoyo_domain_quota_is_ok()

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hwight16() is much faster. While we are at it, no need to include
"perm =" part into data_race() macro, for perm is a local variable
that cannot be accessed by other threads.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
This commit is contained in:
Tetsuo Handa 2021-12-15 20:13:55 +09:00
parent 04e57a2d95
commit f702e11076
1 changed files with 7 additions and 10 deletions
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17
security/tomoyo/util.c
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@ -1056,7 +1056,6 @@ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list,
srcu_read_lock_held(&tomoyo_ss)) {
u16 perm;
u8 i;
if (ptr->is_deleted)
continue;
@ -1067,23 +1066,23 @@ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
*/
switch (ptr->type) {
case TOMOYO_TYPE_PATH_ACL:
data_race(perm = container_of(ptr, struct tomoyo_path_acl, head)->perm);
perm = data_race(container_of(ptr, struct tomoyo_path_acl, head)->perm);
break;
case TOMOYO_TYPE_PATH2_ACL:
data_race(perm = container_of(ptr, struct tomoyo_path2_acl, head)->perm);
perm = data_race(container_of(ptr, struct tomoyo_path2_acl, head)->perm);
break;
case TOMOYO_TYPE_PATH_NUMBER_ACL:
data_race(perm = container_of(ptr, struct tomoyo_path_number_acl, head)
perm = data_race(container_of(ptr, struct tomoyo_path_number_acl, head)
->perm);
break;
case TOMOYO_TYPE_MKDEV_ACL:
data_race(perm = container_of(ptr, struct tomoyo_mkdev_acl, head)->perm);
perm = data_race(container_of(ptr, struct tomoyo_mkdev_acl, head)->perm);
break;
case TOMOYO_TYPE_INET_ACL:
data_race(perm = container_of(ptr, struct tomoyo_inet_acl, head)->perm);
perm = data_race(container_of(ptr, struct tomoyo_inet_acl, head)->perm);
break;
case TOMOYO_TYPE_UNIX_ACL:
data_race(perm = container_of(ptr, struct tomoyo_unix_acl, head)->perm);
perm = data_race(container_of(ptr, struct tomoyo_unix_acl, head)->perm);
break;
case TOMOYO_TYPE_MANUAL_TASK_ACL:
perm = 0;
@ -1091,9 +1090,7 @@ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
default:
perm = 1;
}
for (i = 0; i < 16; i++)
if (perm & (1 << i))
count++;
count += hweight16(perm);
}
if (count < tomoyo_profile(domain->ns, domain->profile)->
pref[TOMOYO_PREF_MAX_LEARNING_ENTRY])