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([140.113.216.168]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-223501fa8f1sm49231965ad.90.2025.03.01.06.26.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Mar 2025 06:26:58 -0800 (PST) From: Kuan-Wei Chiu To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, jk@ozlabs.org, joel@jms.id.au, eajames@linux.ibm.com, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dmitry.torokhov@gmail.com, mchehab@kernel.org, awalls@md.metrocast.net, hverkuil@xs4all.nl, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, louis.peens@corigine.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, parthiban.veerasooran@microchip.com, arend.vanspriel@broadcom.com, johannes@sipsolutions.net, gregkh@linuxfoundation.org, jirislaby@kernel.org, yury.norov@gmail.com, akpm@linux-foundation.org Cc: hpa@zytor.com, alistair@popple.id.au, linux@rasmusvillemoes.dk, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-fsi@lists.ozlabs.org, dri-devel@lists.freedesktop.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, linux-mtd@lists.infradead.org, oss-drivers@corigine.com, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-serial@vger.kernel.org, bpf@vger.kernel.org, jserv@ccns.ncku.edu.tw, david.laight.linux@gmail.com, andrew.cooper3@citrix.com, Kuan-Wei Chiu , Yu-Chun Lin Subject: [PATCH v2 10/18] net: ethernet: oa_tc6: Replace open-coded parity calculation with parity32() Date: Sat, 1 Mar 2025 22:24:01 +0800 Message-Id: <20250301142409.2513835-11-visitorckw@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250301142409.2513835-1-visitorckw@gmail.com> References: <20250301142409.2513835-1-visitorckw@gmail.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Refactor parity calculations to use the standard parity32() helper. This change eliminates redundant implementations and improves code efficiency. Co-developed-by: Yu-Chun Lin Signed-off-by: Yu-Chun Lin Signed-off-by: Kuan-Wei Chiu --- drivers/net/ethernet/oa_tc6.c | 19 +++---------------- 1 file changed, 3 insertions(+), 16 deletions(-) diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c index db200e4ec284..f02dba7b89a1 100644 --- a/drivers/net/ethernet/oa_tc6.c +++ b/drivers/net/ethernet/oa_tc6.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -177,19 +178,6 @@ static int oa_tc6_spi_transfer(struct oa_tc6 *tc6, return spi_sync(tc6->spi, &msg); } -static int oa_tc6_get_parity(u32 p) -{ - /* Public domain code snippet, lifted from - * http://www-graphics.stanford.edu/~seander/bithacks.html - */ - p ^= p >> 1; - p ^= p >> 2; - p = (p & 0x11111111U) * 0x11111111U; - - /* Odd parity is used here */ - return !((p >> 28) & 1); -} - static __be32 oa_tc6_prepare_ctrl_header(u32 addr, u8 length, enum oa_tc6_register_op reg_op) { @@ -202,7 +190,7 @@ static __be32 oa_tc6_prepare_ctrl_header(u32 addr, u8 length, FIELD_PREP(OA_TC6_CTRL_HEADER_ADDR, addr) | FIELD_PREP(OA_TC6_CTRL_HEADER_LENGTH, length - 1); header |= FIELD_PREP(OA_TC6_CTRL_HEADER_PARITY, - oa_tc6_get_parity(header)); + !parity32(header)); return cpu_to_be32(header); } @@ -940,8 +928,7 @@ static __be32 oa_tc6_prepare_data_header(bool data_valid, bool start_valid, FIELD_PREP(OA_TC6_DATA_HEADER_END_BYTE_OFFSET, end_byte_offset); - header |= FIELD_PREP(OA_TC6_DATA_HEADER_PARITY, - oa_tc6_get_parity(header)); + header |= FIELD_PREP(OA_TC6_DATA_HEADER_PARITY, !parity32(header)); return cpu_to_be32(header); }