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authorPeter Hurley <peter@hurleysoftware.com>2014-11-05 20:13:02 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-06 05:50:42 +0300
commit2febdb632bb96235b94b8fccaf882a78f8f4b2bb (patch)
treef4740b43b225a863f05df7edb59d3b3badfdb445 /include/linux/tty.h
parent2aff5e2bc62db43e05c814461a08aff0fc2b7fe5 (diff)
downloadlinux-2febdb632bb96235b94b8fccaf882a78f8f4b2bb.tar.xz
tty: Preset lock subclass for nested tty locks
Eliminate the requirement of specifying the tty lock nesting at lock time; instead, set the lock subclass for slave ptys at pty install (normal ttys and master ptys use subclass 0). Signed-off-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.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index a07b4b415db8..196c352a5ce8 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -640,6 +640,7 @@ extern void __lockfunc tty_lock(struct tty_struct *tty);
extern void __lockfunc tty_unlock(struct tty_struct *tty);
extern void __lockfunc tty_lock_slave(struct tty_struct *tty);
extern void __lockfunc tty_unlock_slave(struct tty_struct *tty);
+extern void tty_set_lock_subclass(struct tty_struct *tty);
/*
* this shall be called only from where BTM is held (like close)
*