linux-kernel - RE: [ANNOUNCE] 3.0-rt4

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Date:	Thu, 28 Jul 2011 16:52:47 +0530
From:	"N, Mugunthan V" <mugunthanvnm@...com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
CC:	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jason Wessel <jason.wessel@...driver.com>
Subject: RE: [ANNOUNCE] 3.0-rt4

Hi RT Folks

I am testing 3.0-rt3 on AM3517 - Arm Cortex A8. As the kernel from the
mainline is not booting I am using a patch to boot AM3517 kernel on top of
the mainline kernel. I am getting a warning as below.

The same issue when I reported for rt3, Thomas has suggested a patch 
that is already integrated in rt4, even then I am getting the same 
warning.

Attaching the patch and the rt-config file.

[  602.014099] BUG: sleeping function called from invalid context at 
kernel/rtmutex.c:645
[  602.014129] in_atomic(): 0, irqs_disabled(): 128, pid: 329, name: 
kworker/0:1
[  602.014129] 2 locks held by kworker/0:1/329:
[  602.014160]  #0:  (events){.+.+..}, at: [<c00b462c>] 
process_one_work+0x1c0/0x5d4
[  602.014190]  #1:  (console_work){+.+...}, at: [<c00b462c>] 
process_one_work+0x1c0/0x5d4
[  602.014251] irq event stamp: 29771
[  602.014251] hardirqs last  enabled at (29770): [<c0461e38>] 
_raw_spin_unlock_irqrestore+0x60/0x68
[  602.014282] hardirqs last disabled at (29771): [<c02c9ebc>] 
serial_omap_console_write+0x28/0x230
[  602.014312] softirqs last  enabled at (0): [<c009968c>] 
copy_process+0x370/0xf78
[  602.014343] softirqs last disabled at (0): [<  (null)>]   (null)
[  602.014404] [<c0065f20>] (unwind_backtrace+0x0/0xf8) from 
[<c0461310>] (rt_spin_lock+0x24/0x5c)
[  602.014434] [<c0461310>] (rt_spin_lock+0x24/0x5c) from [<c02ca068>] 
(serial_omap_console_write+0x1d4/0x230)
[  602.014465] [<c02ca068>] (serial_omap_console_write+0x1d4/0x230) from 
[<c009b68c>] (__call_console_drivers+0xc4/0xe4)
[  602.014495] [<c009b68c>] (__call_console_drivers+0xc4/0xe4) from 
[<c009b8dc>] (console_unlock+0x134/0x1c4)
[  602.014526] [<c009b8dc>] (console_unlock+0x134/0x1c4) from 
[<c00b4704>] (process_one_work+0x298/0x5d4)
[  602.014556] [<c00b4704>] (process_one_work+0x298/0x5d4) from 
[<c00b4fc0>] (worker_thread+0x19c/0x454)
[  602.014587] [<c00b4fc0>] (worker_thread+0x19c/0x454) from 
[<c00bbb58>] (kthread+0x84/0x8c)
[  602.014648] [<c00bbb58>] (kthread+0x84/0x8c) from [<c005fd2c>] 
(kernel_thread_exit+0x0/0x8)

---
Regards,
Mugunthan V N.  

Download attachment "am3517-rt.config" of type "application/octet-stream" (62814 bytes)

Download attachment "am3517evm.patch" of type "application/octet-stream" (4456 bytes)