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X-CSE-ConnectionGUID: 752ATb6DQyS+qyl14EgxAw== X-CSE-MsgGUID: qT30sQYqT0iYyIUVfTdWlw== X-IronPort-AV: E=McAfee;i="6700,10204,11372"; a="43160659" X-IronPort-AV: E=Sophos;i="6.14,246,1736841600"; d="scan'208";a="43160659" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Mar 2025 17:02:31 -0700 X-CSE-ConnectionGUID: oIzgFu6nSxiXQWyPKKfdyg== X-CSE-MsgGUID: 8ugg9EqVSceyCIR4kecUAg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,246,1736841600"; d="scan'208";a="125986543" Received: from kanliang-dev.jf.intel.com ([10.165.154.102]) by orviesa003.jf.intel.com with ESMTP; 13 Mar 2025 17:02:31 -0700 From: kan.liang@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, tglx@linutronix.de, bp@alien8.de, acme@kernel.org, namhyung@kernel.org, irogers@google.com, linux-kernel@vger.kernel.org Cc: ak@linux.intel.com, eranian@google.com, Kan Liang , Dennis Zhou , Tejun Heo , Christoph Lameter , linux-mm@kvack.org Subject: [PATCH V9 2/7] locking/percpu-rwsem: Add guard support Date: Thu, 13 Mar 2025 17:02:37 -0700 Message-Id: <20250314000242.323199-2-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20250314000242.323199-1-kan.liang@linux.intel.com> References: <20250314000242.323199-1-kan.liang@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 61C2940017 X-Stat-Signature: efotja81m54rm5ittf9kf1q5dkxjp1cf X-HE-Tag: 1741910552-791455 X-HE-Meta: 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 IuczrntA DtCijPr38guLPuDqoTxx0jou6Lw/QbAOBkcWE9SK6mESS8SqvC3+9Wy4nwQ98sHxjyBAYPGINOV15ZPdGHsvdyxKwseSOXskjIObiKNEmnvHVd7Mht8efiNGU/u5IOu8wCwdsuH9tD6i3rkFADLpXI+jfCXEHRsOp+WXW1jNqFNa8hJdBV9h5SG94R3A9YpDGXdF0mYEjpqvf5QFViohd99Ee+kBWFyv2LWClf7tj1Sm/aZhiqNYCcQW4zb3OPs9ckypDSwU5PxEnWcU3Vb43APSHQMJwUZ44gxXlDzVal4RroY+zLOzZW4LQjlc5VXRcAdmUj/wtH1c98hNzUDoXbHUAP/IuiZNLonrssFKhDkXzqOQ= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Peter Zijlstra (Intel)" To simplify the usage of the percpu rw semaphore. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Kan Liang Cc: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: linux-mm@kvack.org --- New patch include/linux/percpu-rwsem.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index c012df33a9f0..af7d75ede619 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -8,6 +8,7 @@ #include #include #include +#include struct percpu_rw_semaphore { struct rcu_sync rss; @@ -125,6 +126,13 @@ extern bool percpu_is_read_locked(struct percpu_rw_semaphore *); extern void percpu_down_write(struct percpu_rw_semaphore *); extern void percpu_up_write(struct percpu_rw_semaphore *); +DEFINE_GUARD(percpu_read, struct percpu_rw_semaphore *, + percpu_down_read(_T), percpu_up_read(_T)) +DEFINE_GUARD_COND(percpu_read, _try, percpu_down_read_trylock(_T)) + +DEFINE_GUARD(percpu_write, struct percpu_rw_semaphore *, + percpu_down_write(_T), percpu_up_write(_T)) + static inline bool percpu_is_write_locked(struct percpu_rw_semaphore *sem) { return atomic_read(&sem->block); -- 2.38.1