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add a debugging patch around the tty_reopen WARN_ON

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This commit is contained in:
Kyle McMartin 2010-11-22 18:15:07 -05:00
parent ebb38001c4
commit 15589b25c9
2 changed files with 25 additions and 0 deletions
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17
debug-tty-print-dev-name.patch Normal file
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@ -0,0 +1,17 @@
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 613c852..09c86d2 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1322,7 +1322,11 @@ static int tty_reopen(struct tty_struct *tty)
tty->driver = driver; /* N.B. why do this every time?? */
mutex_lock(&tty->ldisc_mutex);
- WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
+ if (!test_bit(TTY_LDISC, &tty->flags)) {
+ printk("%s: !test_bit(TTY_LDISC, &tty->flags) dev=%s\n",
+ __func, tty->name);
+ WARN_ON(1);
+ }
mutex_unlock(&tty->ldisc_mutex);
return 0;

8
kernel.spec
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@ -609,6 +609,8 @@ Patch202: linux-2.6-debug-taint-vm.patch
Patch203: linux-2.6-debug-vm-would-have-oomkilled.patch
Patch204: linux-2.6-debug-always-inline-kzalloc.patch
Patch210: debug-tty-print-dev-name.patch
Patch380: linux-2.6-defaults-pci_no_msi.patch
Patch381: linux-2.6-defaults-pci_use_crs.patch
Patch383: linux-2.6-defaults-aspm.patch
@ -1201,6 +1203,8 @@ ApplyPatch linux-2.6-debug-taint-vm.patch
###FIX###ApplyPatch linux-2.6-debug-vm-would-have-oomkilled.patch
ApplyPatch linux-2.6-debug-always-inline-kzalloc.patch
ApplyPatch debug-tty-print-dev-name.patch
#
# PCI
#
@ -1959,6 +1963,10 @@ fi
# || ||
%changelog
* Mon Nov 22 2010 Kyle McMartin <kyle@redhat.com>
- Add a debugging patch to help track down which tty is being
poked by plymouth.
* Mon Nov 22 2010 Kyle McMartin <kyle@redhat.com> 2.6.36.1-9
- Linux stable 2.6.36.1