WARNING in tty_io.c

[Shan Wei]

Modify start-ttys.conf to add ttyS0 device on my Fedora13 with 2.6.37-rc1+ kernel.
After rebooting system, got the following WARNING.


------------[ cut here ]------------
WARNING: at drivers/char/tty_io.c:1331 tty_open+0x20e/0x3b2()
Hardware name: Aspire SA80
Modules linked in: ipv6 uinput snd_intel8x0 snd_ac97_codec ac97_bus r8169 ppdev parport_pc snd_seq snd_seq_device snd_pcm sis900 mii snd_timer snd soundcore parport snd_page_alloc pcspkr ata_generic pata_acpi sata_sis pata_sis [last unloaded: scsi_wait_scan]
Pid: 117, comm: plymouthd Not tainted 2.6.37-rc1+ #4
Call Trace:
 [<c044045c>] warn_slowpath_common+0x6a/0x7f
 [<c062aff0>] ? tty_open+0x20e/0x3b2
 [<c0440485>] warn_slowpath_null+0x14/0x18
 [<c062aff0>] tty_open+0x20e/0x3b2
 [<c04dc6c7>] chrdev_open+0xf3/0x110
 [<c04d8688>] __dentry_open+0x141/0x237
 [<c04d8833>] nameidata_to_filp+0x43/0x51
 [<c04dc5d4>] ? chrdev_open+0x0/0x110
 [<c04e25b8>] do_last+0x372/0x47f
 [<c04e3b8d>] do_filp_open+0x19c/0x406
 [<c04e5085>] ? do_vfs_ioctl+0x55e/0x5b4
 [<c05b6232>] ? might_fault+0x1e/0x20
 [<c04d8457>] do_sys_open+0x4d/0xcf
 [<c0581f47>] ? selinux_file_ioctl+0x43/0x46
 [<c04d8525>] sys_open+0x23/0x2b
 [<c04097df>] sysenter_do_call+0x12/0x28
 [<c07a0000>] ? init_intel_cacheinfo+0x6d/0x39e
---[ end trace eeb22dd7bedfb0b1 ]---
 
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