linux-kernel - Re: [PATCH] arch/tile: fix futex sanitization definition/prototype mismatch

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Date:	Sat, 19 Mar 2011 20:52:56 -0700
From:	Michel Lespinasse <walken@...gle.com>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch/tile: fix futex sanitization definition/prototype mismatch

On Sat, Mar 19, 2011 at 8:45 AM, Chris Metcalf <cmetcalf@...era.com> wrote:
> Commit 8d7718aa082aaf30a0b4989e1f04858952f941bc changed "int"
> to "u32" in the prototypes but not the definition.
> I missed this when I saw the patch go by on LKML.
>
> We cast "u32 *" to "int *" since we are tying into the underlying
> atomics framework, and atomic_t uses int as its value type.
>
> Signed-off-by: Chris Metcalf <cmetcalf@...era.com>

Reviewed-by: Michel Lespinasse <walken@...gle.com>

Looks fine. I had held off from changing types within
futex_atomic_op_inuser() because the signed-ness of oparg and cmparg
was important there, but I agree changing at least the user pointer
types in futex_* operations is nice and safe.

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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