From: Ilya Zykov <ilya@ilyx.ru>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH v2] TTY: pty, fix pty counting in "/proc/sys/kernel/pty/nr"
Date: Thu, 27 Oct 2011 13:48:35 +0400 [thread overview]
Message-ID: <4EA928F3.7010204@ilyx.ru> (raw)
Regression for commit: 24d406a6bf736f7aebdc8fa0f0ec86e0890c6d24
Commit: 24d406a6b accepted in Linux 3.1.
Disscussed on linux-kernel@vger.kernel.org "subject: [PATCH] TTY: pty, fix pty counting"
and not accepted.
Although, I think it's clear.
diff -uprN -X ../../dontdiff a/drivers/tty/pty.c b/drivers/tty/pty.c
--- a/drivers/tty/pty.c 2011-05-19 08:06:34.000000000 +0400
+++ b/drivers/tty/pty.c 2011-10-24 23:59:23.000000000 +0400
@@ -36,13 +36,15 @@
static struct tty_driver *ptm_driver;
static struct tty_driver *pts_driver;
#endif
+static int pty_count;
static void pty_close(struct tty_struct *tty, struct file *filp)
{
BUG_ON(!tty);
- if (tty->driver->subtype == PTY_TYPE_MASTER)
+ if (tty->driver->subtype == PTY_TYPE_MASTER) {
WARN_ON(tty->count > 1);
- else {
+ pty_count--;
+ } else {
if (tty->count > 2)
return;
}
@@ -446,7 +448,6 @@ static inline void legacy_pty_init(void)
int pty_limit = NR_UNIX98_PTY_DEFAULT;
static int pty_limit_min;
static int pty_limit_max = NR_UNIX98_PTY_MAX;
-static int pty_count;
static struct cdev ptmx_cdev;
@@ -599,15 +600,9 @@ free_mem_out:
return -ENOMEM;
}
-static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
-{
- pty_count--;
-}
-
static const struct tty_operations ptm_unix98_ops = {
.lookup = ptm_unix98_lookup,
.install = pty_unix98_install,
- .remove = pty_unix98_remove,
.open = pty_open,
.close = pty_close,
.write = pty_write,
@@ -624,7 +619,6 @@ static const struct tty_operations ptm_u
static const struct tty_operations pty_unix98_ops = {
.lookup = pts_unix98_lookup,
.install = pty_unix98_install,
- .remove = pty_unix98_remove,
.open = pty_open,
.close = pty_close,
.write = pty_write,
Signed-off-by: Ilya Zykov <ilya@ilyx.ru>
next reply other threads:[~2011-10-27 9:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-27 9:48 Ilya Zykov [this message]
2011-10-27 12:37 ` [PATCH v2] TTY: pty, fix pty counting in "/proc/sys/kernel/pty/nr" Greg KH
2011-10-27 13:07 ` Ilya Zykov
2011-10-27 15:01 ` Greg KH
2011-10-27 13:41 ` Ilya Zykov
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