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[82.135.80.35]) by smtp.gmail.com with ESMTPSA id z6-20020a5d4d06000000b0033d873f08d4sm6279675wrt.98.2024.02.25.15.28.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Feb 2024 15:28:56 -0800 (PST) From: Thorsten Blum To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Anna-Maria Behnsen , Frederic Weisbecker , Peter Zijlstra , John Stultz , Thorsten Blum Subject: [PATCH] time: Use div64_long() instead of do_div() Date: Mon, 26 Feb 2024 00:25:42 +0100 Message-ID: <20240225232541.17659-2-thorsten.blum@toblux.com> X-Mailer: git-send-email 2.43.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fixes Coccinelle/coccicheck warning reported by do_div.cocci. Compared to do_div(), div64_long() does not implicitly cast the divisor and does not unnecessarily calculate the remainder. Signed-off-by: Thorsten Blum --- kernel/time/jiffies.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c index bc4db9e5ab70..9d23178e2b6a 100644 --- a/kernel/time/jiffies.c +++ b/kernel/time/jiffies.c @@ -91,7 +91,7 @@ int register_refined_jiffies(long cycles_per_second) /* shift_hz stores hz<<8 for extra accuracy */ shift_hz =3D (u64)cycles_per_second << 8; shift_hz +=3D cycles_per_tick/2; - do_div(shift_hz, cycles_per_tick); + shift_hz =3D div64_long(shift_hz, cycles_per_tick); /* Calculate nsec_per_tick using shift_hz */ nsec_per_tick =3D (u64)NSEC_PER_SEC << 8; nsec_per_tick +=3D (u32)shift_hz/2; --=20 2.43.2