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(cst-prg-14-82.cust.vodafone.cz. [46.135.14.82]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b76f5162d26sm1746352666b.3.2025.12.03.01.55.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Dec 2025 01:55:12 -0800 (PST) From: Mateusz Guzik To: brauner@kernel.org Cc: viro@zeniv.linux.org.uk, jack@suse.cz, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Mateusz Guzik Subject: [PATCH] fs: annotate cdev_lock with __cacheline_aligned_in_smp Date: Wed, 3 Dec 2025 10:55:08 +0100 Message-ID: <20251203095508.291073-1-mjguzik@gmail.com> X-Mailer: git-send-email 2.43.0 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" No need for the crapper to be susceptible to false-sharing. Signed-off-by: Mateusz Guzik Reviewed-by: Jan Kara --- fs/char_dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/char_dev.c b/fs/char_dev.c index c2ddb998f3c9..84a5a0699373 100644 --- a/fs/char_dev.c +++ b/fs/char_dev.c @@ -343,7 +343,7 @@ void __unregister_chrdev(unsigned int major, unsigned i= nt baseminor, kfree(cd); } =20 -static DEFINE_SPINLOCK(cdev_lock); +static __cacheline_aligned_in_smp DEFINE_SPINLOCK(cdev_lock); =20 static struct kobject *cdev_get(struct cdev *p) { --=20 2.48.1