From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C78CD332EBD; Wed, 20 May 2026 18:29:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779301790; cv=none; b=Ed02ATSPvG9UIotSzAkcbETJwFpKNy0ttpqy7Mhj5noQRq1Qw1aGXZqHUIUMdPZeLVD2ZJmq8viaRwvJ26VfL1k9KmT/a5daVpU336y5CvLVJubWgMKSa77YiDMuVDHTE8VsBFJgIac0XcdQAnZ+zm7JAYeD5wXBHZI3b9yUxnY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779301790; c=relaxed/simple; bh=4uN3IufiIN7s4q0xjzZYPVjmVNM3LnOQcFrfOr/++4o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=o6Gm2FwJiBekhOijZcSS/0MPMiUcputeWbqmIYXB3Y4wT3x2HshHNo8J5a7v5JQLerLC/nA6NHOWzdA7adbiCI037iyU8vPDyEslAVxh0z7aPhXmGtHdDsdGQmX+dWBEq/BbUe2YbjQn8Z1gLkd2jqBD4X1cCo12lbwVJVYM9mk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SYtmL12v; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="SYtmL12v" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 374F61F00893; Wed, 20 May 2026 18:29:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779301789; bh=M10k/MNVDwtPuQz1ZFy1x+5130gWAPqxyk5h6mib+jQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SYtmL12vEMH2JJunEwVjIc1CXYu4OCTUvWXjzGjq52THYpk4oFzI9rhTc4hR2BI7c 5VuYFPiEQDR+7xAK7YNaE+uNYedYCMdyb986P7Q2Kq1RuL6JI1ICanmMwyR8CgMVb2 M0p9812GYjAW9wJE6mDHqnwj9rT1POfYWeA/IF0M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bart Van Assche , "Peter Zijlstra (Intel)" , Sasha Levin Subject: [PATCH 6.6 021/508] locking: Fix rwlock support in Date: Wed, 20 May 2026 18:17:24 +0200 Message-ID: <20260520162059.048001029@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162058.573354582@linuxfoundation.org> References: <20260520162058.573354582@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bart Van Assche [ Upstream commit 756a0e011cfca0b45a48464aa25b05d9a9c2fb0b ] Architecture support for rwlocks must be available whether or not CONFIG_DEBUG_SPINLOCK has been defined. Move the definitions of the arch_{read,write}_{lock,trylock,unlock}() macros such that these become visbile if CONFIG_DEBUG_SPINLOCK=n. This patch prepares for converting do_raw_{read,write}_trylock() into inline functions. Without this patch that conversion triggers a build failure for UP architectures, e.g. arm-ep93xx. I used the following kernel configuration to build the kernel for that architecture: CONFIG_ARCH_MULTIPLATFORM=y CONFIG_ARCH_MULTI_V7=n CONFIG_ATAGS=y CONFIG_MMU=y CONFIG_ARCH_MULTI_V4T=y CONFIG_CPU_LITTLE_ENDIAN=y CONFIG_ARCH_EP93XX=y Fixes: fb1c8f93d869 ("[PATCH] spinlock consolidation") Signed-off-by: Bart Van Assche Signed-off-by: Peter Zijlstra (Intel) Link: https://patch.msgid.link/20260313171510.230998-2-bvanassche@acm.org Signed-off-by: Sasha Levin --- include/linux/spinlock_up.h | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/include/linux/spinlock_up.h b/include/linux/spinlock_up.h index c87204247592f..a132fc562297a 100644 --- a/include/linux/spinlock_up.h +++ b/include/linux/spinlock_up.h @@ -48,16 +48,6 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock) lock->slock = 1; } -/* - * Read-write spinlocks. No debug version. - */ -#define arch_read_lock(lock) do { barrier(); (void)(lock); } while (0) -#define arch_write_lock(lock) do { barrier(); (void)(lock); } while (0) -#define arch_read_trylock(lock) ({ barrier(); (void)(lock); 1; }) -#define arch_write_trylock(lock) ({ barrier(); (void)(lock); 1; }) -#define arch_read_unlock(lock) do { barrier(); (void)(lock); } while (0) -#define arch_write_unlock(lock) do { barrier(); (void)(lock); } while (0) - #else /* DEBUG_SPINLOCK */ #define arch_spin_is_locked(lock) ((void)(lock), 0) /* for sched/core.c and kernel_lock.c: */ @@ -68,4 +58,14 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock) #define arch_spin_is_contended(lock) (((void)(lock), 0)) +/* + * Read-write spinlocks. No debug version. + */ +#define arch_read_lock(lock) do { barrier(); (void)(lock); } while (0) +#define arch_write_lock(lock) do { barrier(); (void)(lock); } while (0) +#define arch_read_trylock(lock) ({ barrier(); (void)(lock); 1; }) +#define arch_write_trylock(lock) ({ barrier(); (void)(lock); 1; }) +#define arch_read_unlock(lock) do { barrier(); (void)(lock); } while (0) +#define arch_write_unlock(lock) do { barrier(); (void)(lock); } while (0) + #endif /* __LINUX_SPINLOCK_UP_H */ -- 2.53.0