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authorTetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>2014-06-04 16:05:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:53:51 -0700
commit8fe6929cfd43c44834858a53e129ffdc7c166298 (patch)
treeca0f40dfcf8fff6959727f43256e557f1dfd5775 /kernel/kthread.c
parentc177c81e09e517bbf75b67762cdab1b83aba6976 (diff)
downloadlwn-8fe6929cfd43c44834858a53e129ffdc7c166298.tar.gz
lwn-8fe6929cfd43c44834858a53e129ffdc7c166298.zip
kthread: fix return value of kthread_create() upon SIGKILL.
Commit 786235eeba0e ("kthread: make kthread_create() killable") meant for allowing kthread_create() to abort as soon as killed by the OOM-killer. But returning -ENOMEM is wrong if killed by SIGKILL from userspace. Change kthread_create() to return -EINTR upon SIGKILL. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Cc: <stable@vger.kernel.org> [3.13+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kthread.c')
-rw-r--r--kernel/kthread.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 9a130ec06f7a..c2390f41307b 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -262,7 +262,7 @@ static void create_kthread(struct kthread_create_info *create)
* kthread_stop() has been called). The return value should be zero
* or a negative error number; it will be passed to kthread_stop().
*
- * Returns a task_struct or ERR_PTR(-ENOMEM).
+ * Returns a task_struct or ERR_PTR(-ENOMEM) or ERR_PTR(-EINTR).
*/
struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
void *data, int node,
@@ -298,7 +298,7 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
* that thread.
*/
if (xchg(&create->done, NULL))
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(-EINTR);
/*
* kthreadd (or new kernel thread) will call complete()
* shortly.