RE: [PATCH 03/28] Be explicit about _GNU_SOURCE

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> The recommended way to use this macro is at the top of the source file,
> avoid globally setting it via 'gcc -D' as few source files actually
> need it. In this tree we only need it in 17 out of 83 sources.
> 
> _GNU_SOURCE changes the behaviour of a few select calls away from the
> C99
> standard and should generally be minimized.
> 
> Signed-off-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>

For my parts

Acked-by: Sean Hefty <sean.hefty@xxxxxxxxx>
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