linux-kernel - Re: [PATCH 4/9] ARC: mm: do_page_fault refactor #3: tidyup vma access permission code

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Message-ID: <C2D7FE5348E1B147BCA15975FBA2307501A2517B16@us01wembx1.internal.synopsys.com>
Date:   Thu, 16 May 2019 17:37:51 +0000
From:   Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
CC:     "paltsev@...opsys.com" <paltsev@...opsys.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: [PATCH 4/9] ARC: mm: do_page_fault refactor #3: tidyup vma
 access permission code

On 5/16/19 10:24 AM, Eugeniy Paltsev wrote:
>> +	unsigned int write = 0, exec = 0, mask;
> Probably it's better to use 'bool' type for 'write' and 'exec' as we really use them as a boolean variables.

Right those are semantics, but the generated code for "bool" is not ideal - given
it is inherently a "char" it is promoted first to an int with an additional EXTB
which I really dislike.
Guess it is more of a style thing.

-Vineet