From: Paul Mundt <lethal@linux-sh.org>
To: linux-sh@vger.kernel.org
Subject: Re: sh:fixed issue in xchg_u32 function when val==r15.
Date: Thu, 07 Apr 2011 16:53:15 +0000 [thread overview]
Message-ID: <20110407165315.GC8052@linux-sh.org> (raw)
In-Reply-To: <4D9DB4A5.4010002@st.com>
On Thu, Apr 07, 2011 at 01:57:09PM +0100, Srinivas KANDAGATLA wrote:
> Recently we have discovered a bug in xchg_u32 function of GUSA_RB feature.
> This function breaks if one of the input parameter 'val' is r15.
>
> 168: 02 c7 mova 174 <exit_mm+0x54>,r0
> 16a: 09 00 nop
> 16c: f3 61 mov r15,r1
> 16e: fc ef mov #-4,r15
The -4 here is part of the gUSA login sequence, so if you're seeing the
problem with gUSA based xchg_u32 it seems like you're going to have to
apply the same fix for all gUSA rollback users.
next prev parent reply other threads:[~2011-04-07 16:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-07 12:57 sh:fixed issue in xchg_u32 function when val==r15 Srinivas KANDAGATLA
2011-04-07 16:53 ` Paul Mundt [this message]
2011-04-19 16:28 ` Srinivas KANDAGATLA
2011-06-08 6:51 ` Paul Mundt
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