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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 14:08:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 14:08:47 -0800
commitc6bd5bcc4983f1a2d2f87a3769bf309482ee8c04 (patch)
tree2ff9c4496dc2258d601a1bcd82040470704dae3b /kernel
parent8966961b31c251b854169e9886394c2a20f2cea7 (diff)
parentb0ab02361167faa82198b783a8d555eb6f58901c (diff)
Merge tag 'tty-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY/Serial merge from Greg Kroah-Hartman: "Here's the big tty/serial tree set of changes for 3.8-rc1. Contained in here is a bunch more reworks of the tty port layer from Jiri and bugfixes from Alan, along with a number of other tty and serial driver updates by the various driver authors. Also, Jiri has been coerced^Wconvinced to be the co-maintainer of the TTY layer, which is much appreciated by me. All of these have been in the linux-next tree for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" Fixed up some trivial conflicts in the staging tree, due to the fwserial driver having come in both ways (but fixed up a bit in the serial tree), and the ioctl handling in the dgrp driver having been done slightly differently (staging tree got that one right, and removed both TIOCGSOFTCAR and TIOCSSOFTCAR). * tag 'tty-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (146 commits) staging: sb105x: fix potential NULL pointer dereference in mp_chars_in_buffer() staging/fwserial: Remove superfluous free staging/fwserial: Use WARN_ONCE when port table is corrupted staging/fwserial: Destruct embedded tty_port on teardown staging/fwserial: Fix build breakage when !CONFIG_BUG staging: fwserial: Add TTY-over-Firewire serial driver drivers/tty/serial/serial_core.c: clean up HIGH_BITS_OFFSET usage staging: dgrp: dgrp_tty.c: Audit the return values of get/put_user() staging: dgrp: dgrp_tty.c: Remove the TIOCSSOFTCAR ioctl handler from dgrp driver serial: ifx6x60: Add modem power off function in the platform reboot process serial: mxs-auart: unmap the scatter list before we copy the data serial: mxs-auart: disable the Receive Timeout Interrupt when DMA is enabled serial: max310x: Setup missing "can_sleep" field for GPIO tty/serial: fix ifx6x60.c declaration warning serial: samsung: add devicetree properties for non-Exynos SoCs serial: samsung: fix potential soft lockup during uart write tty: vt: Remove redundant null check before kfree. tty/8250 Add check for pci_ioremap_bar failure tty/8250 Add support for Commtech's Fastcom Async-335 and Fastcom Async-PCIe cards tty/8250 Add XR17D15x devices to the exar_handle_irq override ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/auditsc.c2
-rw-r--r--kernel/printk.c12
2 files changed, 12 insertions, 2 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 2f186ed80c40..fc7376bf86ea 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1159,7 +1159,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
cred = current_cred();
spin_lock_irq(&tsk->sighand->siglock);
- if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
+ if (tsk->signal && tsk->signal->tty)
tty = tsk->signal->tty->name;
else
tty = "(none)";
diff --git a/kernel/printk.c b/kernel/printk.c
index 2d607f4d1797..22e070f3470a 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -87,6 +87,12 @@ static DEFINE_SEMAPHORE(console_sem);
struct console *console_drivers;
EXPORT_SYMBOL_GPL(console_drivers);
+#ifdef CONFIG_LOCKDEP
+static struct lockdep_map console_lock_dep_map = {
+ .name = "console_lock"
+};
+#endif
+
/*
* This is used for debugging the mess that is the VT code by
* keeping track if we have the console semaphore held. It's
@@ -1908,12 +1914,14 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
*/
void console_lock(void)
{
- BUG_ON(in_interrupt());
+ might_sleep();
+
down(&console_sem);
if (console_suspended)
return;
console_locked = 1;
console_may_schedule = 1;
+ mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_);
}
EXPORT_SYMBOL(console_lock);
@@ -1935,6 +1943,7 @@ int console_trylock(void)
}
console_locked = 1;
console_may_schedule = 0;
+ mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_);
return 1;
}
EXPORT_SYMBOL(console_trylock);
@@ -2095,6 +2104,7 @@ skip:
local_irq_restore(flags);
}
console_locked = 0;
+ mutex_release(&console_lock_dep_map, 1, _RET_IP_);
/* Release the exclusive_console once it is used */
if (unlikely(exclusive_console))