linux-kernel - Re: [PATCH] x86: pass in pt_regs pointer for syscalls that need it (take 2)

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Message-ID: <20090212110250.GA23665@elte.hu>
Date:	Thu, 12 Feb 2009 12:02:50 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Brian Gerst <brgerst@...il.com>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: pass in pt_regs pointer for syscalls that need it
	(take 2)


* H. Peter Anvin <hpa@...or.com> wrote:

> Brian Gerst wrote:
>> Some syscalls need to access the pt_regs structure, either to copy
>> user register state or to modifiy it.  This patch adds stubs to load
>> the address of the pt_regs struct into the %eax register, and changes
>> the syscalls to take the pointer as an argument instead of relying on
>> the assumption that the pt_regs structure overlaps the function
>> arguments.
>>
>> Signed-off-by: Brian Gerst <brgerst@...il.com>
>
> Testing this now, together with the do_rt_sigreturn -> sys_rt_sigreturn  
> change.  If it works okay I'll commit it as an incremental diff to  
> tip:core/percpu.

FYI, i merged the delta commit you applied to tip:master as well - it's all
looking good in testing so far.

	Ingo
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