Re: [PATCH 2/2] x86/asm/entry/32: Remove unnecessary optimization in stub32_clone

From: Linus Torvalds
Date: Wed Apr 22 2015 - 14:22:09 EST


On Wed, Apr 22, 2015 at 10:10 AM, Josh Triplett <josh@xxxxxxxxxxxxxxxx> wrote:
>
> I do think my two-patch HAVE_COPY_THREAD_TLS series should go in fixing
> this

Ugh, I absolutely detesrt that patch.

Don't make random crazy function signatures that depend on some config
option. That's just evil. The patch is a mess of #ifdef's and should
be shot in the head and staked with a silver stake to make sure it
never re-appears.

Either:

(a) make the change for every architecture

(b) have side-by-side interfaces. With different names!

but not that disgusting "the calling conventions of these random
functions are different on different architectures and we use a config
flag to distinguish the cases".

Linus
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