linux-kernel - Re: [PATCH] MIPS: uaccess: Reduce number of nested macros

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Message-ID: <20210408203744.GA18538@alpha.franken.de>
Date:   Thu, 8 Apr 2021 22:37:44 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: uaccess: Reduce number of nested macros

On Thu, Apr 08, 2021 at 09:46:11PM +0200, Christoph Hellwig wrote:
> > +#define put_user(x, ptr)						\
> > +({									\
> > +	__typeof__(*(ptr)) __user *__p = (ptr);				\
> > +									\
> > +	might_fault();							\
> > +	access_ok(__p, sizeof(*__p)) ?					\
> > +		__put_user((x), __p) :					\
> > +		-EFAULT;						\
> 
> Why not merge this into a single line, which seems a little more
> readable:
> 
> 	access_ok(__p, sizeof(*__p)) ? __put_user((x), __p) : -EFAULT;	\

I just copied the riscv version ;-) I'll make it one line before applying.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]