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authorArnd Bergmann <arnd@arndb.de>2010-06-02 00:53:08 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-11 00:47:44 +0400
commitddcd9fb66ae7f448b517242c10a31d4e17bcad45 (patch)
tree54c5894f3c1dd45580cd45c621bbeb9174da879b /include/linux/tty.h
parent203652192634c1fce5e79df0a8ff2fabfaefd3ab (diff)
downloadlinux-ddcd9fb66ae7f448b517242c10a31d4e17bcad45.tar.xz
tty: remove tty_lock_nested
This changes all remaining users of tty_lock_nested to be non-recursive, which lets us kill this function. As a consequence, we won't need to keep the lock count any more, which allows more simplifications later. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/tty.h')
-rw-r--r--include/linux/tty.h16
1 files changed, 1 insertions, 15 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 955d72ea71c0..0fbafb0b69bf 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -417,6 +417,7 @@ extern int is_ignored(int sig);
extern int tty_signal(int sig, struct tty_struct *tty);
extern void tty_hangup(struct tty_struct *tty);
extern void tty_vhangup(struct tty_struct *tty);
+extern void tty_vhangup_locked(struct tty_struct *tty);
extern void tty_vhangup_self(void);
extern void tty_unhangup(struct file *filp);
extern int tty_hung_up_p(struct file *filp);
@@ -578,21 +579,6 @@ extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg);
/* functions for preparation of BKL removal */
-
-/*
- * tty_lock_nested get the tty_lock while potentially holding it
- *
- * The Big TTY Mutex is a recursive lock, meaning you can take it
- * from a thread that is already holding it.
- * This is bad for a number of reasons, so tty_lock_nested should
- * really be used as rarely as possible. If a code location can
- * be shown to never get called with this held already, it should
- * use tty_lock() instead.
- */
-static inline void __lockfunc tty_lock_nested(void) __acquires(kernel_lock)
-{
- lock_kernel();
-}
static inline void tty_lock(void) __acquires(kernel_lock)
{
#ifdef CONFIG_LOCK_KERNEL