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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2011-09-25 17:50:23 +0900
committerJames Morris <jmorris@namei.org>2011-09-26 10:46:20 +1000
commitf9732ea145886786a6f8b0493bc2239e70cbacdb (patch)
treee29b2441cc916a174d7cd0b03cd18986ae545250 /security/tomoyo/domain.c
parent778c4a4d60d932c1df6d270dcbc88365823c3963 (diff)
downloadlinux-linaro-stable-f9732ea145886786a6f8b0493bc2239e70cbacdb.tar.gz
TOMOYO: Simplify garbage collector.
When TOMOYO started using garbage collector at commit 847b173e "TOMOYO: Add garbage collector.", we waited for close() before kfree(). Thus, elements to be kfree()d were queued up using tomoyo_gc_list list. But it turned out that tomoyo_element_linked_by_gc() tends to choke garbage collector when certain pattern of entries are queued. Since garbage collector is no longer waiting for close() since commit 2e503bbb "TOMOYO: Fix lockdep warning.", we can remove tomoyo_gc_list list and tomoyo_element_linked_by_gc() by doing sequential processing. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/domain.c')
-rw-r--r--security/tomoyo/domain.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index 70acf7aebbda..da16dfeed728 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -39,6 +39,8 @@ int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
if (mutex_lock_interruptible(&tomoyo_policy_lock))
return -ENOMEM;
list_for_each_entry_rcu(entry, list, list) {
+ if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
+ continue;
if (!check_duplicate(entry, new_entry))
continue;
entry->is_deleted = param->is_delete;
@@ -115,6 +117,8 @@ int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(entry, list, list) {
+ if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
+ continue;
if (!tomoyo_same_acl_head(entry, new_entry) ||
!check_duplicate(entry, new_entry))
continue;