linux-kernel - Re: [PATCH -next 2/2] bcache: Use max_t() when comparing different types

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Message-ID: <1391677607.15777.2.camel@joe-AO722>
Date:	Thu, 06 Feb 2014 01:06:47 -0800
From:	Joe Perches <joe@...ches.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Kent Overstreet <kmo@...erainc.com>,
	Neil Brown <neilb@...e.de>, linux-bcache@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Next <linux-next@...r.kernel.org>
Subject: Re: [PATCH -next 2/2] bcache: Use max_t() when comparing different
 types

On Thu, 2014-02-06 at 10:00 +0100, Geert Uytterhoeven wrote:
> On Mon, Feb 3, 2014 at 2:47 PM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > On Wed, Jan 15, 2014 at 12:06 PM, Joe Perches <joe@...ches.com> wrote:
> >> On Wed, 2014-01-15 at 10:06 +0100, Geert Uytterhoeven wrote:
> >>> drivers/md/bcache/btree.c: In function ‘insert_u64s_remaining’:
> >>> drivers/md/bcache/btree.c:1816: warning: comparison of distinct pointer types lacks a cast
> >> []
> >>> diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
> >> []
> >>> @@ -1813,7 +1813,7 @@ static size_t insert_u64s_remaining(struct btree *b)
> >>>       if (b->keys.ops->is_extents)
> >>>               ret -= KEY_MAX_U64S;
> >>>
> >>> -     return max(ret, 0L);
> >>> +     return max_t(ssize_t, ret, 0L);
> >>
> >> why not
> >>         return max(ret, 0);
> >
> > Indeed, that also works, on both 32-bit and 64-bit.
> > Will resend, now all the issues moved from -next to Linus' tree.
> 
> However, sparse doesn't like it, so we'll have to go for v1?

Seems so.

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