On Tue, Feb 13, 2018 at 01:52:54PM -0800, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
>
> Teach sparse about the "indirect_branch" attribute as used in
> Linux kernel:
> #define __noretpoline __attribute__((indirect_branch("keep")))
> and tell sparse to ignore it.
>
> This eliminates over 148K warnings (which also cause the
> 0day bot to send error reports uselessly).
Sigh.
I think that these unknown attribute warnings are useless
in general and even more so for the kernel. The kernel should
have "-Wno-unknown-attribute" in its CHECKFLAGS.
> Or does sparse need to do something with it?
No, it's the only thing needed. Thanks.
I've applied it in my dev tree and will push it in a few
days to the stable tree where I collect all pending changes:
git://github.com/lucvoo/sparse.git
-- Luc
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