[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>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 5d386f4bea49..8971484b956b 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -24,6 +24,7 @@
 #include <linux/major.h>
 #include <linux/fs.h>
 #include <linux/console.h>
+#include <linux/signal.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -641,7 +642,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
                 extern int spawnpid, spawnsig;
                 if (!perm || !capable(CAP_KILL))
                   return -EPERM;
-                if (arg < 1 || arg > _NSIG || arg == SIGKILL)
+                if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
                   return -EINVAL;
                 spawnpid = current->pid;
                 spawnsig = arg;