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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2015-03-31 16:55:57 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-06 23:26:57 +0300
commit1d6b98774cff82860a3f044610e956bcbff556c1 (patch)
treec959dc2546bdaf01d8c29cd49530561049f11b1e /include/linux/tty.h
parentcaec172d57fde299ee4f4b05c851a059771fd5b7 (diff)
downloadlinux-1d6b98774cff82860a3f044610e956bcbff556c1.tar.xz
tty: constify return type of tty_name
All users of tty_name pass the result directly to a printf-like function. This means we can actually let tty_name return the literal "NULL tty" or tty->name directly, avoiding the strcpy and a lot of medium-sized stack buffers. In preparation for that, make the return type const char*. While at it, we can also constify the tty parameter. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
-rw-r--r--include/linux/tty.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index fe5623c9af71..4cbecfc7b3c9 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -421,7 +421,7 @@ static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
const char *routine);
-extern char *tty_name(struct tty_struct *tty, char *buf);
+extern const char *tty_name(const struct tty_struct *tty, char *buf);
extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
extern int tty_check_change(struct tty_struct *tty);
extern void __stop_tty(struct tty_struct *tty);