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authorRodolfo Giometti <giometti@linux.it>2010-03-10 15:23:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:43 -0800
commit572b9adbd40b5565dc413db04af9cc234f72bf19 (patch)
tree038e00dc5f3b5b1e8835b083df7dccabb2cfd88f
parentb3e63afe8a74c0134d05a551cc74facc3b3ec0d7 (diff)
downloadop-kernel-dev-572b9adbd40b5565dc413db04af9cc234f72bf19.zip
op-kernel-dev-572b9adbd40b5565dc413db04af9cc234f72bf19.tar.gz
ldisc n_tty: add new method n_tty_inherit_ops()
This new method can be used to init a new struct tty_ldisc_ops as the default tty_ldisc_N_TTY struct. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/char/n_tty.c17
-rw-r--r--include/linux/tty.h1
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index 2e50f4d..bdae832 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -48,6 +48,7 @@
#include <linux/audit.h>
#include <linux/file.h>
#include <linux/uaccess.h>
+#include <linux/module.h>
#include <asm/system.h>
@@ -2091,3 +2092,19 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = {
.receive_buf = n_tty_receive_buf,
.write_wakeup = n_tty_write_wakeup
};
+
+/**
+ * n_tty_inherit_ops - inherit N_TTY methods
+ * @ops: struct tty_ldisc_ops where to save N_TTY methods
+ *
+ * Used by a generic struct tty_ldisc_ops to easily inherit N_TTY
+ * methods.
+ */
+
+void n_tty_inherit_ops(struct tty_ldisc_ops *ops)
+{
+ *ops = tty_ldisc_N_TTY;
+ ops->owner = NULL;
+ ops->refcount = ops->flags = 0;
+}
+EXPORT_SYMBOL_GPL(n_tty_inherit_ops);
diff --git a/include/linux/tty.h b/include/linux/tty.h
index d96e588..568369a 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -514,6 +514,7 @@ extern void tty_ldisc_enable(struct tty_struct *tty);
/* n_tty.c */
extern struct tty_ldisc_ops tty_ldisc_N_TTY;
+extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
/* tty_audit.c */
#ifdef CONFIG_AUDIT
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