path: root/include
diff options
authorOleg Nesterov <oleg@redhat.com>2015-11-06 16:32:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 17:50:42 -0800
commitbe0e6f290f78b84a3b21b8c8c46819c4514fe632 (patch)
treeccf0623cfbe7b0486f08b100032465d773dcb7dd /include
parent2e01fabe67ccaff1d59bda01e60a61f5fb0aa7b6 (diff)
signal: turn dequeue_signal_lock() into kernel_dequeue_signal()
1. Rename dequeue_signal_lock() to kernel_dequeue_signal(). This matches another "for kthreads only" kernel_sigaction() helper. 2. Remove the "tsk" and "mask" arguments, they are always current and current->blocked. And it is simply wrong if tsk != current. 3. We could also remove the 3rd "siginfo_t *info" arg but it looks potentially useful. However we can simplify the callers if we change kernel_dequeue_signal() to accept info => NULL. 4. Remove _irqsave, it is never called from atomic context. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Tejun Heo <tj@kernel.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Felipe Balbi <balbi@ti.com> Cc: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
1 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 923ec1a9b2b4..3d54924b4b86 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2462,14 +2462,15 @@ extern void ignore_signals(struct task_struct *);
extern void flush_signal_handlers(struct task_struct *, int force_default);
extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
-static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
+static inline int kernel_dequeue_signal(siginfo_t *info)
- unsigned long flags;
+ struct task_struct *tsk = current;
+ siginfo_t __info;
int ret;
- spin_lock_irqsave(&tsk->sighand->siglock, flags);
- ret = dequeue_signal(tsk, mask, info);
- spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
+ spin_lock_irq(&tsk->sighand->siglock);
+ ret = dequeue_signal(tsk, &tsk->blocked, info ?: &__info);
+ spin_unlock_irq(&tsk->sighand->siglock);
return ret;