[PATCH] do_sigaction: don't worry about signal_pending()

do_sigaction() returns -ERESTARTNOINTR if signal_pending(). The comment says:

	* If there might be a fatal signal pending on multiple
	* threads, make sure we take it before changing the action.
	
I think this is not needed. We should only worry about SIGNAL_GROUP_EXIT case,
bit it implies a pending SIGKILL which can't be cleared by do_sigaction.

Kill this special case.

Signed-off-by: Oleg Nesterov <[email protected]>

--- t/kernel/signal.c~SA_NOPEND	2007-08-20 19:40:31.000000000 +0400
+++ t/kernel/signal.c	2007-08-20 19:43:41.000000000 +0400
@@ -2300,15 +2300,6 @@ int do_sigaction(int sig, struct k_sigac
 	k = &current->sighand->action[sig-1];
 
 	spin_lock_irq(&current->sighand->siglock);
-	if (signal_pending(current)) {
-		/*
-		 * If there might be a fatal signal pending on multiple
-		 * threads, make sure we take it before changing the action.
-		 */
-		spin_unlock_irq(&current->sighand->siglock);
-		return -ERESTARTNOINTR;
-	}
-
 	if (oact)
 		*oact = *k;
 

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH] do_sigaction: don't worry about signal_pending()
    • From: Jarek Poplawski <[email protected]>
  • Re: [PATCH] do_sigaction: don't worry about signal_pending()
    • From: Roland McGrath <[email protected]>

• Prev by Date: Re: [Cluster-devel] Re: [gfs2][RFC] readdir caused ls process into D (uninterruptible) state, under testing with Samba 3.0.25
• Next by Date: Re: [linux-usb-devel] why was MODALIAS removed from usb kernel events? [u]
• Previous by thread: code read question
• Next by thread: Re: [PATCH] do_sigaction: don't worry about signal_pending()
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]