-----Original Message-----
From: <owner-src-committ...@freebsd.org> on behalf of Benjamin Kaduk
<bjkf...@gmail.com>
Date: 2018-06-06, Wednesday at 07:40
To: Ravi Pokala <rpok...@freebsd.org>
Cc: Mateusz Guzik <m...@freebsd.org>, src-committers
<src-committ...@freebsd.org>, <svn-src-...@freebsd.org>,
<svn-src-head@freebsd.org>
Subject: Re: svn commit: r334702 - head/sys/sys
> On Wed, Jun 6, 2018 at 6:35 AM, Ravi Pokala <rpok...@freebsd.org> wrote:
>>
>> Hi Mateusz,
>>
>> -----Original Message-----
>> From: <owner-src-committ...@freebsd.org> on behalf of Mateusz Guzik
>> <m...@freebsd.org>
>> Date: 2018-06-06, Wednesday at 01:08
>> To: <src-committ...@freebsd.org>, <svn-src-...@freebsd.org>,
>> <svn-src-head@freebsd.org>
>> Subject: svn commit: r334702 - head/sys/sys
>>
>>> ...
>>> #ifdef _KERNEL
>>> #define malloc(size, type, flags) ({
>>> \
>>
>> Now that I'm taking another look at this, I'm confused as to why the entire
>> macro expansion is inside parentheses? (The braces make sense, since this is
>> a block with local variables which need to be contained.)
>
> This is a gcc (and clang) extension to allow the macro body to be a code
> block -- standard C gets unhappy with just the curly braces.
> https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html is a maybe-relevant
> page that google found me.
"Neat." Thanks Ben.
-Ravi
> -Ben
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