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Mon, 25 May 2026 06:07:02 -0700 (PDT) Received: from honglab.tailc96cb.ts.net ([140.123.97.73]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb58d9ce4sm92823055ad.64.2026.05.25.06.07.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 May 2026 06:07:02 -0700 (PDT) From: "WEI-HONG, YE" <1234567weewee457@gmail.com> To: Arnd Bergmann Cc: Waiman Long , Peter Zijlstra , linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Cheng-Han Wu , "WEI-HONG, YE" <1234567weewee457@gmail.com> Subject: [PATCH] locking/qspinlock: Clarify pending field layout Date: Mon, 25 May 2026 13:04:50 +0000 Message-ID: <20260525130450.723937-1-1234567weewee457@gmail.com> X-Mailer: git-send-email 2.48.1 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" For CONFIG_NR_CPUS < 16K, _Q_PENDING_BITS is 8 and the pending field occupies bits 8-15 of the lock word. The current comment documents bit 8 as pending and bits 9-15 as unused, which describes the pending flag value rather than the field layout. Describe bits 8-15 as the pending byte so the layout description is consistent with the lock byte. Signed-off-by: WEI-HONG, YE <1234567weewee457@gmail.com> Acked-by: Waiman Long --- include/asm-generic/qspinlock_types.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/include/asm-generic/qspinlock_types.h b/include/asm-generic/qs= pinlock_types.h index 2fd1fb89ec36..7d17b9bb069c 100644 --- a/include/asm-generic/qspinlock_types.h +++ b/include/asm-generic/qspinlock_types.h @@ -53,8 +53,7 @@ typedef struct qspinlock { * * When NR_CPUS < 16K * 0- 7: locked byte - * 8: pending - * 9-15: not used + * 8-15: pending byte * 16-17: tail index * 18-31: tail cpu (+1) * --=20 2.48.1