linux-kernel - Re: ia64 lockdep: trying to register non-static key (mm->mmap

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Message-ID: <3877989d0911252152g6bd13a32oc387e282eceda3f1@mail.gmail.com>
Date:	Thu, 26 Nov 2009 13:52:13 +0800
From:	Luming Yu <luming.yu@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	"Luck, Tony" <tony.luck@...el.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: ia64 lockdep: trying to register non-static key (mm->mmap_sem)

sorry for noise, I've figured it out that locdep annoatation is missed in IA64
__rwsem_initializer.

On Thu, Nov 26, 2009 at 11:43 AM, Luming Yu <luming.yu@...il.com> wrote:
> Anybody know how I should do to fix the lockdep
> warning below, which is triggered in
> ia64_brk doing "down_write(&mm->mmap_sem)"
>
> Any comments are appreciated.
>
>
> INFO: trying to register non-static key.
> the code is fine but needs lockdep annotation.
> turning off the locking correctness validator.
>
> Call Trace:
>  [<a000000100017330>] show_stack+0x70/0xc0
>                                sp=e0000004807a7c50 bsp=e0000004807a1c78
>  [<a0000001000173d0>] dump_stack+0x50/0x80
>                                sp=e0000004807a7e20 bsp=e0000004807a1c58
>  [<a0000001000f7ca0>] __lock_acquire+0x1a0/0x13e0
>                                sp=e0000004807a7e20 bsp=e0000004807a1bc0
>  [<a0000001000fc310>] lock_acquire+0x170/0x1e0
>                                sp=e0000004807a7e20 bsp=e0000004807a1b60
>  [<a0000001008338d0>] down_write+0x70/0x180
>                                sp=e0000004807a7e20 bsp=e0000004807a1b28
>  [<a00000010003b960>] ia64_brk+0x60/0x280
>                                sp=e0000004807a7e20 bsp=e0000004807a1aa0
>  [<a00000010000c620>] ia64_ret_from_syscall+0x0/0x20
>
>
> Thanks,
> Luming
>
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