linux-kernel - RE: [PATCH V4 1/2] x86/msr: expose msr_flip

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Date:   Wed, 29 Mar 2017 13:01:29 +0000
From:   "Liang, Kan" <kan.liang@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bp@...en8.de" <bp@...en8.de>, "acme@...nel.org" <acme@...nel.org>,
        "eranian@...gle.com" <eranian@...gle.com>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>
Subject: RE: [PATCH V4 1/2] x86/msr: expose msr_flip_bit function



> > -static inline int __flip_bit(u32 msr, u8 bit, bool set)
> > +int msr_flip_bit(u32 msr, u8 bit, bool set)
> >  {
> >  	struct msr m, m1;
> >  	int err = -EINVAL;
> > @@ -85,6 +85,7 @@ static inline int __flip_bit(u32 msr, u8 bit, bool
> > set)
> >
> >  	return 1;
> >  }
> > +EXPORT_SYMBOL_GPL(msr_flip_bit);
> 
> That export is not required. The call site is always built in.
> 

If so, msr_set_bit/msr_clear_bit should be enough for our requirement.
msr_flip_bit is just a duplicate interface.
I think I will drop this patch.

Thanks,
Kan