linux-kernel - Re: [PATCH] MIPS: ptrace: Fix PTRACE

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Message-ID: <20180524125959.GB24269@jamesdev>
Date:   Thu, 24 May 2018 14:00:00 +0100
From:   James Hogan <jhogan@...nel.org>
To:     "Maciej W. Rozycki" <macro@...s.com>
Cc:     Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] MIPS: ptrace: Fix PTRACE_PEEKUSR requests for 64-bit FGRs

On Wed, May 16, 2018 at 04:39:58PM +0100, Maciej W. Rozycki wrote:
> Use 64-bit accesses for 64-bit floating-point general registers with 
> PTRACE_PEEKUSR, removing the truncation of their upper halves in the 
> FR=1 mode, caused by commit bbd426f542cb ("MIPS: Simplify FP context 
> access"), which inadvertently switched them to using 32-bit accesses.
> 
> The PTRACE_POKEUSR side is fine as it's never been broken and continues 
> using 64-bit accesses.
> 
> Cc: <stable@...r.kernel.org> # 3.19+

should that be 3.15+?

Cheers
James

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