Re: [PATCH v4 1/1] x86/cpu: Make sure flag_is_changeable_p() is always being used

[Andy Shevchenko]

On Fri, Nov 08, 2024 at 04:13:05PM +0100, H. Peter Anvin wrote:
> On November 8, 2024 3:11:46 PM GMT+01:00, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> >When flag_is_changeable_p() is unused, it prevents kernel builds
> >with clang, `make W=1` and CONFIG_WERROR=y:
> >
> >arch/x86/kernel/cpu/common.c:351:19: error: unused function 'flag_is_changeable_p' [-Werror,-Wunused-function]
> >  351 | static inline int flag_is_changeable_p(u32 flag)
> >      |                   ^~~~~~~~~~~~~~~~~~~~
> >
> >Fix this by moving core around to make sure flag_is_changeable_p() is
> >always being used.
> >
> >See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
> >inline functions for W=1 build").
> >
> >While at it, fix the argument type to be unsigned long, although it currently
> >only runs in 32-bit cases.

...

> It's good that you are changing the return type, but we need to be consistent
> and change f1, f2 to match. At the same time, I suggest changing the return
> type to bool.

Ah, that makes sense!

-- 
With Best Regards,
Andy Shevchenko