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authorOleg Nesterov <oleg@redhat.com>2014-06-06 21:36:57 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-06 23:08:11 (GMT)
commitec5955b8fdc1b0bc62495e13869769be732cc6c3 (patch)
tree3fde70b6f5b92fe7117cb47b8fe6f87376781f8d /kernel/signal.c
parentc240837fa7a7dd8cb3bef017ffb8af2c32cb0caf (diff)
downloadlinux-ec5955b8fdc1b0bc62495e13869769be732cc6c3.tar.xz
signals: kill the obsolete sigdelset() and recalc_sigpending() in allow_signal()
allow_signal() does sigdelset(current->blocked) due to historic reason, previously it could be called by a daemonize()'ed kthread, and daemonize() played with current->blocked. Now that daemonize() has gone away we can remove sigdelset() and recalc_sigpending(). If a user really wants to unblock a signal, it must use sigprocmask() or set_current_block() explicitely. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Richard Weinberger <richard@nod.at> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 7d6ff8b..c64c891 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3072,16 +3072,13 @@ COMPAT_SYSCALL_DEFINE4(rt_tgsigqueueinfo,
*/
void allow_signal(int sig)
{
- spin_lock_irq(&current->sighand->siglock);
- /* This is only needed for daemonize()'ed kthreads */
- sigdelset(&current->blocked, sig);
/*
* Kernel threads handle their own signals. Let the signal code
* know it'll be handled, so that they don't get converted to
* SIGKILL or just silently dropped.
*/
+ spin_lock_irq(&current->sighand->siglock);
current->sighand->action[(sig)-1].sa.sa_handler = (void __user *)2;
- recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
}
EXPORT_SYMBOL(allow_signal);