commit 7ed20e1ad521b5f5df61bf6559ae60738e393741
author Jesper Juhl <juhl-lkml@dif.dk> Sun May 01 08:59:14 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> Sun May 01 08:59:14 2005 -0700
tree 90931724e45eaedb3445314e8b94e78253642395
parent e5bdd883a189243541e7a132385580703b049102

[PATCH] convert that currently tests _NSIG directly to use valid_signal()

Convert most of the current code that uses _NSIG directly to instead use
valid_signal().  This avoids gcc -W warnings and off-by-one errors.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index e6567d7..8f3debc 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -23,6 +23,7 @@
 #include <linux/syscalls.h>
 #include <linux/ptrace.h>
 #include <linux/posix-timers.h>
+#include <linux/signal.h>
 #include <asm/param.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -646,7 +647,7 @@
 				 struct task_struct *t)
 {
 	int error = -EINVAL;
-	if (sig < 0 || sig > _NSIG)
+	if (!valid_signal(sig))
 		return error;
 	error = -EPERM;
 	if ((!info || ((unsigned long)info != 1 &&
@@ -1245,7 +1246,7 @@
 	 * Make sure legacy kernel users don't send in bad values
 	 * (normal paths check this in check_kill_permission).
 	 */
-	if (sig < 0 || sig > _NSIG)
+	if (!valid_signal(sig))
 		return -EINVAL;
 
 	/*
@@ -1520,7 +1521,7 @@
 		if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)
 			sig = 0;
 	}
-	if (sig > 0 && sig <= _NSIG)
+	if (valid_signal(sig) && sig > 0)
 		__group_send_sig_info(sig, &info, tsk->parent);
 	__wake_up_parent(tsk, tsk->parent);
 	spin_unlock_irqrestore(&psig->siglock, flags);
@@ -2364,7 +2365,7 @@
 {
 	struct k_sigaction *k;
 
-	if (sig < 1 || sig > _NSIG || (act && sig_kernel_only(sig)))
+	if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig)))
 		return -EINVAL;
 
 	k = &current->sighand->action[sig-1];