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From: Ming Lei on 6 Aug 2010 23:30

Hi,

Following the ttty warning during kernel boot, seems it is for a long time
in gregkh's tree.

[ 0.660082] ------------[ cut here ]------------
[ 0.660088] WARNING: at include/linux/tty.h:590 tty_lock+0x24/0x3e()
[ 0.660089] Hardware name:
[ 0.660091] Modules linked in:
[ 0.660094] Pid: 1, comm: swapper Not tainted 2.6.35-gkh-wl+ #51
[ 0.660096] Call Trace:
[ 0.660101] [<ffffffff8104766a>] warn_slowpath_common+0x80/0x98
[ 0.660105] [<ffffffff81047697>] warn_slowpath_null+0x15/0x17
[ 0.660108] [<ffffffff8123a5a3>] tty_lock+0x24/0x3e
[ 0.660111] [<ffffffff8123d69c>] tty_open+0x60/0x4a4
[ 0.660115] [<ffffffff810e81be>] chrdev_open+0x134/0x155
[ 0.660118] [<ffffffff810e808a>] ? chrdev_open+0x0/0x155
[ 0.660122] [<ffffffff810e4074>] __dentry_open+0x147/0x27d
[ 0.660125] [<ffffffff810e426f>] nameidata_to_filp+0x3a/0x4b
[ 0.660137] [<ffffffff810ef69c>] do_last+0x472/0x5b9
[ 0.660140] [<ffffffff810efc1b>] do_filp_open+0x1ee/0x5f1
[ 0.660144] [<ffffffff8106164a>] ? sched_clock_cpu+0xc3/0xce
[ 0.660147] [<ffffffff8106aba1>] ? lockstat_clock+0x11/0x13
[ 0.660151] [<ffffffff8136ff42>] ? _raw_spin_unlock+0x3e/0x4c
[ 0.660155] [<ffffffff810f99f5>] ? alloc_fd+0x111/0x123
[ 0.660158] [<ffffffff810e3e44>] do_sys_open+0x5e/0x10a
[ 0.660162] [<ffffffff81059765>] ? flush_workqueue+0x0/0xa7
[ 0.660166] [<ffffffff810e3f19>] sys_open+0x1b/0x1d
[ 0.660170] [<ffffffff81892745>] kernel_init+0x1b5/0x222
[ 0.660174] [<ffffffff8100a8e4>] kernel_thread_helper+0x4/0x10
[ 0.660177] [<ffffffff81370694>] ? restore_args+0x0/0x30
[ 0.660181] [<ffffffff81892590>] ? kernel_init+0x0/0x222
[ 0.660183] [<ffffffff8100a8e0>] ? kernel_thread_helper+0x0/0x10
[ 0.660185] ---[ end trace f777fed7c0166a97 ]---
[ 0.660369] ------------[ cut here ]------------
[ 0.660372] WARNING: at include/linux/tty.h:590 tty_lock+0x24/0x3e()
[ 0.660374] Hardware name:
[ 0.660375] Modules linked in:
[ 0.660378] Pid: 1, comm: swapper Tainted: G W 2.6.35-gkh-wl+ #51
[ 0.660379] Call Trace:
[ 0.660382] [<ffffffff8104766a>] warn_slowpath_common+0x80/0x98
[ 0.660386] [<ffffffff81047697>] warn_slowpath_null+0x15/0x17
[ 0.660388] [<ffffffff8123a5a3>] tty_lock+0x24/0x3e
[ 0.660391] [<ffffffff8123dab9>] tty_open+0x47d/0x4a4
[ 0.660394] [<ffffffff810e81be>] chrdev_open+0x134/0x155
[ 0.660397] [<ffffffff810e808a>] ? chrdev_open+0x0/0x155
[ 0.660399] [<ffffffff810e4074>] __dentry_open+0x147/0x27d
[ 0.660402] [<ffffffff810e426f>] nameidata_to_filp+0x3a/0x4b
[ 0.660405] [<ffffffff810ef69c>] do_last+0x472/0x5b9
[ 0.660408] [<ffffffff810efc1b>] do_filp_open+0x1ee/0x5f1
[ 0.660411] [<ffffffff8106164a>] ? sched_clock_cpu+0xc3/0xce
[ 0.660414] [<ffffffff8106aba1>] ? lockstat_clock+0x11/0x13
[ 0.660417] [<ffffffff8136ff42>] ? _raw_spin_unlock+0x3e/0x4c
[ 0.660420] [<ffffffff810f99f5>] ? alloc_fd+0x111/0x123
[ 0.660430] [<ffffffff810e3e44>] do_sys_open+0x5e/0x10a
[ 0.660433] [<ffffffff81059765>] ? flush_workqueue+0x0/0xa7
[ 0.660437] [<ffffffff810e3f19>] sys_open+0x1b/0x1d
[ 0.660440] [<ffffffff81892745>] kernel_init+0x1b5/0x222
[ 0.660443] [<ffffffff8100a8e4>] kernel_thread_helper+0x4/0x10
[ 0.660446] [<ffffffff81370694>] ? restore_args+0x0/0x30
[ 0.660449] [<ffffffff81892590>] ? kernel_init+0x0/0x222
[ 0.660452] [<ffffffff8100a8e0>] ? kernel_thread_helper+0x0/0x10
[ 0.660454] ---[ end trace f777fed7c0166a98 ]---
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From: Arnd Bergmann on 7 Aug 2010 04:00
On Saturday 07 August 2010, Ming Lei wrote:
> Following the ttty warning during kernel boot, seems it is for a long time
> in gregkh's tree.

The fix for this is in the bkl/core tree, meaning it doesn't show up
in the linux-next tree.

The warning by itself is harmless, so there was no strict need to
coordinate this better. In fact, with the removal of the optional
BKL behavior, I believe the warning is now gone from the tty
tree as well.

Arnd
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From: Ming Lei on 7 Aug 2010 04:40
2010/8/7 Arnd Bergmann <arnd(a)arndb.de>:
> On Saturday 07 August 2010, Ming Lei wrote:
>> Following the ttty warning during kernel boot, seems it is for a long time
>> in gregkh's tree.
>
> The fix for this is in the bkl/core tree, meaning it doesn't show up
> in the linux-next tree.
>
> The warning by itself is harmless, so there was no strict need to
> coordinate this better. In fact, with the removal of the optional
> BKL behavior, I believe the warning is now gone from the tty
> tree as well.

Oh, I see, thanks.

--
Lei Ming
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