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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-482dbcf9c3fsm2626395e9.4.2026.01.29.13.52.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jan 2026 13:52:26 -0800 (PST) Date: Thu, 29 Jan 2026 21:52:25 +0000 From: David Laight To: Kuppuswamy Sathyanarayanan Cc: "Rafael J . Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Srinivas Pandruvada , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 3/9] powercap: intel_rapl: Use GENMASK() and BIT() macros Message-ID: <20260129215225.33cce6dc@pumpkin> In-Reply-To: <20260129183646.558866-4-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20260129183646.558866-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20260129183646.558866-4-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 29 Jan 2026 10:36:40 -0800 Kuppuswamy Sathyanarayanan wrote: > Replace hardcoded bitmasks and bit shift operations with standard > GENMASK(), GENMASK_ULL(), BIT(), and BIT_ULL() macros for better > readability and to follow kernel coding conventions. > > No functional changes. Assuming that changing values to 'unsigned long' doesn't have any subtle side effects. ... > value = (ra.value & ENERGY_UNIT_MASK) >> ENERGY_UNIT_OFFSET; > - rd->energy_unit = ENERGY_UNIT_SCALE * 1000000 / (1 << value); > + rd->energy_unit = ENERGY_UNIT_SCALE * 1000000 / BIT(value); That should really be: rd->energy_unit = ENERGY_UNIT_SCALE * 1000000 >> value; While using BIT() for bit patterns is resonable, wholesale substition isn't really right - and that isn't a bit pattern. David