signals: inline __fatal_signal_pending

__fatal_signal_pending inlines to one instruction on x86, probably two
instructions on other machines.  It takes two longer x86 instructions just
to call it and test its return value, not to mention the function itself.

On my random x86_64 config, this saved 70 bytes of text (59 of those being
__fatal_signal_pending itself).

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9e5a88afe6be9008e5d869640d1d1855afaec5e5..e951bd2eb9fc9f05d8141ab8c0e35f2ad958bc4f 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2337,7 +2337,10 @@ static inline int signal_pending(struct task_struct *p)
        return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
 }
 
-extern int __fatal_signal_pending(struct task_struct *p);
+static inline int __fatal_signal_pending(struct task_struct *p)
+{
+       return unlikely(sigismember(&p->pending.signal, SIGKILL));
+}
 
 static inline int fatal_signal_pending(struct task_struct *p)
 {

diff --git a/kernel/signal.c b/kernel/signal.c
index c6d7a24a86a1d3d01c144c38d73494d4e70faa85..6705320784fd2b07a518c4d2bb47520d0b342aa8 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1050,12 +1050,6 @@ void zap_other_threads(struct task_struct *p)
        }
 }
 
-int __fatal_signal_pending(struct task_struct *tsk)
-{
-       return sigismember(&tsk->pending.signal, SIGKILL);
-}
-EXPORT_SYMBOL(__fatal_signal_pending);
-
 struct sighand_struct *lock_task_sighand(struct task_struct *tsk, unsigned long *flags)
 {
        struct sighand_struct *sighand;