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From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Tue, 13 Mar 2018 19:49:52 +0200
Message-ID: <CAHp75VfTyLfzGmFTknjk4nfbk-7qicFU9QoEjzmiSMhsty8Ffg@mail.gmail.com>
Subject: Re: [PATCH 1/1] x86/platform/x86: Fix count of CHas on
 multi-pci-segment arches
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: "Kroening, Gary" <gary.kroening@hpe.com>,
        "mingo@redhat.com" <mingo@redhat.com>, "hpa@zytor.com" <hpa@zytor.com>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "peterz@infradead.org" <peterz@infradead.org>,
        "Travis, Mike" <mike.travis@hpe.com>,
        "Banman, Andrew" <abanman@hpe.com>,
        "Sivanich, Dimitri" <dimitri.sivanich@hpe.com>,
        "Anderson, Russ" <russ.anderson@hpe.com>,
        "x86@kernel.org" <x86@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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On Tue, Mar 13, 2018 at 7:46 PM, Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
>>>>> +       pci_read_config_dword(dev, SKX_CAPID6, &val);
>>>>> +       return bitmap_weight((unsigned long *)&val, SKX_CHA_BIT_WIDTH);

Forgot about hweight32(). Can you use that one directly?

hweight32(x & (BIT(_WIDTH) - 1));

?

-- 
With Best Regards,
Andy Shevchenko