linux-kernel - [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC

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Message-Id: <20200602005428.18087-1-maochenxi@eswin.com>
Date:   Tue,  2 Jun 2020 08:54:28 +0800
From:   Chenxi Mao <maochenxi@...in.com>
To:     paul.walmsley@...ive.com
Cc:     palmer@...belt.com, aou@...s.berkeley.edu,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        maochenxi@...in.com
Subject: [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC_RMW by default

Enable ARCH_SUPPORTS_ATOMIC_RMW by default to support
osq_lock in mutex/rwsem locks.
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index a31e1a41913a..cbdc605d20d9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -68,6 +68,7 @@ config RISCV
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select HAVE_COPY_THREAD_TLS
 	select HAVE_ARCH_KASAN if MMU && 64BIT
+	select ARCH_SUPPORTS_ATOMIC_RMW
 
 config ARCH_MMAP_RND_BITS_MIN
 	default 18 if 64BIT
-- 
2.25.1