[PATCH] i386: Increase MALLOC_ALIGNMENT to 16 [BZ #21120]

[Carlos O'Donell]

On 06/29/2017 01:30 PM, H.J. Lu wrote:
> GCC 7 changed the definition of max_align_t on i386:
> 
> https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=9b5c49ef97e63cc63f1ffa13baf771368105ebe2
> 
> As a result, glibc malloc no longer returns memory blocks which are as
> aligned as max_align_t requires.
> 
> This causes malloc/tst-malloc-thread-fail to fail with an error like this
> one:
> 
> error: allocation function 0, size 144 not aligned to 16
> 
> This patch increases the malloc alignment to 16 for i386.
> 
> Tested on i386 with GCC 7 and on x86-64.  OK for master?
> 
> H.J.
> ---
> 	[BZ #21120]
> 	* sysdeps/generic/malloc-alignment.h: New file.
> 	* sysdeps/i386/malloc-alignment.h: Likewise.
> 	* sysdeps/generic/malloc-machine.h: Include <malloc-alignment.h>.

Please use malloc-machine.h which was the previous header that provided
machine-dependent malloc definitions. That way we remain consistent across
releases and make it easier to backport such changes without adding a new
header.

OK with that change.

-- 
Cheers,
Carlos.