linux-kernel - RE: [PATCH v10 03/38] x86/msr: Add the WRMSRNS instruction support

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Message-ID: <SA1PR11MB6734445986E951E686172419A8FFA@SA1PR11MB6734.namprd11.prod.outlook.com>
Date:   Fri, 22 Sep 2023 08:16:33 +0000
From:   "Li, Xin3" <xin3.li@...el.com>
To:     "Li, Xin3" <xin3.li@...el.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
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Subject: RE: [PATCH v10 03/38] x86/msr: Add the WRMSRNS instruction support

> > > +static __always_inline void __wrmsrns(u32 msr, u32 low, u32 high)
> >
> > Shouldn't this be named wrmsrns_safe since it has exception handling, similar
> to
> > the current wrmsrl_safe.
> >
> 
> Both safe and unsafe versions have exception handling, while the safe
> version returns an integer to its caller to indicate an exception did
> happen or not.

I notice there are several call sites using the safe version w/o
checking the return value, should the unsafe version be a better
choice in such cases?