From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7D759CC6B03 for ; Thu, 2 Apr 2026 06:56:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:Message-Id:MIME-Version:Subject: Date:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=NhaCPE4EsVtU//DbnvitRv8jy0/EyOKs88mQsTqv1vs=; b=Ru4CHJPrSbh/eA 49QzeHp2WpRTD4jZO1CBjTkaJsvQBv/3aGbFD0IUZxk62o+G383G5C+h3nTQ3+WiAgS1S7EtoE8b3 2FZiU4dPDAYydNIt1eo/L4gZUBH1rUGGjYS95tmZnAChtkyX1sR00ICdqDFtK2zOeZCkQAamP8DN7 QNe3vB0mRBHAxVkMVFj1HaScEi0Noi3Ur9rk6njzekuDby6AcRElzgLV3d+zhjIt936Y1U/SJDPJo BmH2owMKFT9JyqKgcQy0beXlp2Ag5aj8F60OlTCv1jIKLRx47dE22XkV3rC4fMakA0PCaVwDN6yva musSDOwDHIqYOwu7eiXg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w8Bys-0000000GxNC-3U5X; Thu, 02 Apr 2026 06:56:42 +0000 Received: from mail-pl1-x631.google.com ([2607:f8b0:4864:20::631]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w8Byq-0000000GxKH-37cV for linux-riscv@lists.infradead.org; Thu, 02 Apr 2026 06:56:41 +0000 Received: by mail-pl1-x631.google.com with SMTP id d9443c01a7336-2b2589c26e3so4352275ad.1 for ; Wed, 01 Apr 2026 23:56:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775112999; x=1775717799; darn=lists.infradead.org; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=FlpdYf1WLDHAMV/rn1y6xYHlGkLnTRJ4f+O5zsHNUww=; b=dhZr9nA76k0PgCKC43mhvkZqs0g192+mmQQugqJyX6+TT8X1Y0yG7uKwPtw8v+FmB1 kUBPasxycNc7CC5e+1pOB18XfsNE+LOXDx+eualb+Iixc5ekyhbvy+61niLnnvN+GVK3 SHhweJg4ev2CPLopNQVOHY/2/DOo/bKbvbGbCZIK+MnWRKxMMOidOhuSik2/y7R0GjSV zOOBfou8WZWiH5w5Px45A8DYoSaGMIrrShvpkkjqzih5no7n5CQTZnd6A4biBRXKDskP tUco8N+IoAosJIsyMQ1rEWZLZN5CGF3Y6VJ7aaGlKN7n077rQni4vcfpfyLai8D5IrbM TYmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775112999; x=1775717799; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=FlpdYf1WLDHAMV/rn1y6xYHlGkLnTRJ4f+O5zsHNUww=; b=BJLxJJOXB2T6jcLv42ZTZVXn+2k9R3tz3qQsheFBKze5nrABqYGZ8mmjYo2pK4gdJ/ wZX9jb1U2sGuQy88fLQRZvglbVfG/2f0TGNC2kzO3xPv2H6eMvBS+WnSIsLGiCXXphNP PowMfKCDuTPSxuYND+47ahaminTYpEa2z3ayRC6DenBHouXeRjhLEDyzns5l0ibEpOlw BqwpmBuNJZUe1wLwgm0IvMedORBiCrzqdIncC703Y5ZMUw+sklxxmWtN022f+Nmn7dlb QsR4Wm4YWE8QJdKAomPJ31ZaTE2fUkDr4sikdHQqwpCSc4hsWsD7c6bUjzHDgtSc/9Pd VRFg== X-Forwarded-Encrypted: i=1; AJvYcCVR5Xkwi89w9d867EdEw5t6YEbULWpRyYp2aucMQB9J64t96upy4SuEdM8BZYoRVniW8Ne+mhQW54uxMQ==@lists.infradead.org X-Gm-Message-State: AOJu0YwFlb2mz7NLc5URB8/0l9K2GL1qzHMss6T1haYmi3upBo1WbtMC AIRk9tpbSK1m0DD1ou4niUiWrGJAttbCyxLV6LrWUQ5U4FlneNFl45Iq X-Gm-Gg: AeBDiet5pIebOF21P5mVjwYKvOL1CGiIykcCOQDDya/TbdlypW1fZW7J8ZR81P9pkL5 QdNZKii6AJEwsH1lxKpcUDh3TeD17ebRsd+zSlguiGgD0SyvSgiPcgJpJ3Sfjzc/Ek83aJRSIfx DJj4sr3fQWh4Cp9nNdRKFlA6XYOeI9kBXkQh9pCg6O9//SU5F6RRkJHNFdFpC/YYxNxUGGQi7B/ 2jMJHwhj1OVxkIkOj2GUQlfPSPR/Q97zLGLilhV+mcafqElo51eTQQSmTU9ukwLf9eHKDlTVaQ/ 657lVePOiS89gXpT4UGcn0SU3rZfOpGksO4fNc4l2FRVO3lGL5PF5jnmbnMu7DnwXhfRdLTCCS2 teFTn4nGWDxjKMAR9Eg0+K2ZjHHqSFC77VkP3SG+ujSwd02BdmmGUP4LM6oTRJLv9Ah09sITK2Q ezc9lDmZJS7Iu7Hr0XcVTUfz/EI2r8gmYUmBu9yxHkJWCu1z7m7ewKgtgbc87Z3appI5U= X-Received: by 2002:a17:903:90b:b0:2b2:470d:6d18 with SMTP id d9443c01a7336-2b269adfea5mr73898055ad.8.1775112999356; Wed, 01 Apr 2026 23:56:39 -0700 (PDT) Received: from 1.0.0.127.in-addr.arpa ([240e:34c:5765:500:7999:76d9:8e52:f837]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2749a1e9csm19647945ad.55.2026.04.01.23.56.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Apr 2026 23:56:38 -0700 (PDT) From: Hangbin Liu Date: Thu, 02 Apr 2026 14:56:01 +0800 Subject: [PATCH] cmpxchg: allow const-qualified old value in cmpxchg() MIME-Version: 1.0 Message-Id: <20260402-cmpxchg-v1-1-4561e2c05d2c@gmail.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDEwMj3eTcgorkjHRdo7QUYwPzNBOTRBNDJaDqgqLUtMwKsEnRsbW1AGI cTBRZAAAA X-Change-ID: 20260402-cmpxchg-2fd307f44a41 To: Richard Henderson , Matt Turner , Magnus Lindholm , Vineet Gupta , Brian Cain , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Andreas Larsson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chris Zankel , Max Filippov Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Jakub Kicinski , Hangbin Liu X-Mailer: b4 0.14.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260401_235640_801371_9F3DD278 X-CRM114-Status: GOOD ( 16.24 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The old value passed to cmpxchg() is semantically read-only: it is only loaded into a register as a comparand and is never written back. However, the macro currently assigns it implicitly to a local variable of type __typeof__(*(ptr)), which triggers -Werror=discarded-qualifiers when old is a const-qualified pointer and ptr points to a non-const type. To avoid this, let's add an explicit cast to __typeof__(*(ptr)) for the old local variable in the cmpxchg macros. This explicit cast suppresses the -Wdiscarded-qualifiers diagnostic. The new value is intentionally left without a cast: new will be stored into *ptr, so silently accepting a const-qualified new would allow callers to store a pointer-to-const into a non-const location without any compiler warning. Suggested-by: Jakub Kicinski Signed-off-by: Hangbin Liu --- This is my first time posting a patch with multi-architecture specific changes, so I'm not sure which target repository I should use. Please correct me if I made any mistakes. --- arch/alpha/include/asm/cmpxchg.h | 4 ++-- arch/arc/include/asm/cmpxchg.h | 4 ++-- arch/hexagon/include/asm/cmpxchg.h | 2 +- arch/parisc/include/asm/cmpxchg.h | 2 +- arch/powerpc/include/asm/cmpxchg.h | 8 ++++---- arch/riscv/include/asm/cmpxchg.h | 4 ++-- arch/sh/include/asm/cmpxchg.h | 2 +- arch/sparc/include/asm/cmpxchg_32.h | 2 +- arch/sparc/include/asm/cmpxchg_64.h | 2 +- arch/x86/include/asm/cmpxchg.h | 2 +- arch/xtensa/include/asm/cmpxchg.h | 2 +- tools/arch/x86/include/asm/cmpxchg.h | 2 +- 12 files changed, 18 insertions(+), 18 deletions(-) diff --git a/arch/alpha/include/asm/cmpxchg.h b/arch/alpha/include/asm/cmpxchg.h index ae1b96479d0c..b4b8dac759c4 100644 --- a/arch/alpha/include/asm/cmpxchg.h +++ b/arch/alpha/include/asm/cmpxchg.h @@ -234,7 +234,7 @@ ____cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, #define arch_cmpxchg_local(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) ____cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, \ @@ -265,7 +265,7 @@ ____cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, #define arch_cmpxchg(ptr, o, n) \ ({ \ __typeof__(*(ptr)) __ret; \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ smp_mb(); \ __ret = (__typeof__(*(ptr))) ____cmpxchg((ptr), \ diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h index 76f43db0890f..9637e2cdb5b1 100644 --- a/arch/arc/include/asm/cmpxchg.h +++ b/arch/arc/include/asm/cmpxchg.h @@ -42,7 +42,7 @@ #define arch_cmpxchg_relaxed(ptr, old, new) \ ({ \ __typeof__(ptr) _p_ = (ptr); \ - __typeof__(*(ptr)) _o_ = (old); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(old); \ __typeof__(*(ptr)) _n_ = (new); \ __typeof__(*(ptr)) _prev_; \ \ @@ -64,7 +64,7 @@ #define arch_cmpxchg(ptr, old, new) \ ({ \ volatile __typeof__(ptr) _p_ = (ptr); \ - __typeof__(*(ptr)) _o_ = (old); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(old); \ __typeof__(*(ptr)) _n_ = (new); \ __typeof__(*(ptr)) _prev_; \ unsigned long __flags; \ diff --git a/arch/hexagon/include/asm/cmpxchg.h b/arch/hexagon/include/asm/cmpxchg.h index 9c58fb81f7fd..7e117964cb6b 100644 --- a/arch/hexagon/include/asm/cmpxchg.h +++ b/arch/hexagon/include/asm/cmpxchg.h @@ -54,7 +54,7 @@ __arch_xchg(unsigned long x, volatile void *ptr, int size) #define arch_cmpxchg(ptr, old, new) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ - __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __old = (__typeof__(*(ptr)))(old); \ __typeof__(*(ptr)) __new = (new); \ __typeof__(*(ptr)) __oldval = (__typeof__(*(ptr))) 0; \ \ diff --git a/arch/parisc/include/asm/cmpxchg.h b/arch/parisc/include/asm/cmpxchg.h index bf0a0f1189eb..2a87942227f8 100644 --- a/arch/parisc/include/asm/cmpxchg.h +++ b/arch/parisc/include/asm/cmpxchg.h @@ -78,7 +78,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size) #define arch_cmpxchg(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ diff --git a/arch/powerpc/include/asm/cmpxchg.h b/arch/powerpc/include/asm/cmpxchg.h index dbb50c06f0bf..36d113b13623 100644 --- a/arch/powerpc/include/asm/cmpxchg.h +++ b/arch/powerpc/include/asm/cmpxchg.h @@ -698,7 +698,7 @@ __cmpxchg_acquire(void *ptr, unsigned long old, unsigned long new, } #define arch_cmpxchg(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ @@ -707,7 +707,7 @@ __cmpxchg_acquire(void *ptr, unsigned long old, unsigned long new, #define arch_cmpxchg_local(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ @@ -715,7 +715,7 @@ __cmpxchg_acquire(void *ptr, unsigned long old, unsigned long new, #define arch_cmpxchg_relaxed(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ (unsigned long)_o_, (unsigned long)_n_, \ @@ -724,7 +724,7 @@ __cmpxchg_acquire(void *ptr, unsigned long old, unsigned long new, #define arch_cmpxchg_acquire(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \ (unsigned long)_o_, (unsigned long)_n_, \ diff --git a/arch/riscv/include/asm/cmpxchg.h b/arch/riscv/include/asm/cmpxchg.h index 8712cf9c69dc..3026a9ff43c4 100644 --- a/arch/riscv/include/asm/cmpxchg.h +++ b/arch/riscv/include/asm/cmpxchg.h @@ -215,7 +215,7 @@ cas_prepend, cas_append) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ - __typeof__(*(__ptr)) __old = (old); \ + __typeof__(*(__ptr)) __old = (__typeof__(*(__ptr)))(old); \ __typeof__(*(__ptr)) __new = (new); \ __typeof__(*(__ptr)) __ret; \ \ @@ -331,7 +331,7 @@ union __u128_halves { #define __arch_cmpxchg128(p, o, n, cas_sfx) \ ({ \ - __typeof__(*(p)) __o = (o); \ + __typeof__(*(p)) __o = (__typeof__(*(p)))(o); \ union __u128_halves __hn = { .full = (n) }; \ union __u128_halves __ho = { .full = (__o) }; \ register unsigned long t1 asm ("t1") = __hn.low; \ diff --git a/arch/sh/include/asm/cmpxchg.h b/arch/sh/include/asm/cmpxchg.h index 1e5dc5ccf7bf..7fb9214d246f 100644 --- a/arch/sh/include/asm/cmpxchg.h +++ b/arch/sh/include/asm/cmpxchg.h @@ -68,7 +68,7 @@ static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old, #define arch_cmpxchg(ptr,o,n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h index 8c1a3ca34eeb..f733bd5b5d3b 100644 --- a/arch/sparc/include/asm/cmpxchg_32.h +++ b/arch/sparc/include/asm/cmpxchg_32.h @@ -55,7 +55,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size) #define arch_cmpxchg(ptr, o, n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ diff --git a/arch/sparc/include/asm/cmpxchg_64.h b/arch/sparc/include/asm/cmpxchg_64.h index 3de25262c411..4a9ccf80487a 100644 --- a/arch/sparc/include/asm/cmpxchg_64.h +++ b/arch/sparc/include/asm/cmpxchg_64.h @@ -170,7 +170,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) #define arch_cmpxchg(ptr,o,n) \ ({ \ - __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index a88b06f1c35e..a7984842c58a 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -85,7 +85,7 @@ extern void __add_wrong_size(void) #define __raw_cmpxchg(ptr, old, new, size, lock) \ ({ \ __typeof__(*(ptr)) __ret; \ - __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __old = (__typeof__(*(ptr)))(old); \ __typeof__(*(ptr)) __new = (new); \ switch (size) { \ case __X86_CASE_B: \ diff --git a/arch/xtensa/include/asm/cmpxchg.h b/arch/xtensa/include/asm/cmpxchg.h index b6db4838b175..0f68eddb6d2d 100644 --- a/arch/xtensa/include/asm/cmpxchg.h +++ b/arch/xtensa/include/asm/cmpxchg.h @@ -83,7 +83,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) } #define arch_cmpxchg(ptr,o,n) \ - ({ __typeof__(*(ptr)) _o_ = (o); \ + ({ __typeof__(*(ptr)) _o_ = (__typeof__(*(ptr)))(o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof (*(ptr))); \ diff --git a/tools/arch/x86/include/asm/cmpxchg.h b/tools/arch/x86/include/asm/cmpxchg.h index 0ed9ca2766ad..b71938db9422 100644 --- a/tools/arch/x86/include/asm/cmpxchg.h +++ b/tools/arch/x86/include/asm/cmpxchg.h @@ -35,7 +35,7 @@ extern void __cmpxchg_wrong_size(void) #define __raw_cmpxchg(ptr, old, new, size, lock) \ ({ \ __typeof__(*(ptr)) __ret; \ - __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __old = (__typeof__(*(ptr)))(old); \ __typeof__(*(ptr)) __new = (new); \ switch (size) { \ case __X86_CASE_B: \ --- base-commit: 48b3cd69265f346f64b93064723492da46206e9b change-id: 20260402-cmpxchg-2fd307f44a41 Best regards, -- Hangbin Liu _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv