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([193.77.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a568a5407csm10725072f8f.12.2025.06.16.02.53.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Jun 2025 02:53:18 -0700 (PDT) From: Uros Bizjak To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Uros Bizjak , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: [PATCH 2/2] x86/vdso: Use RDPID mnemonic in vdso_red_cpunode() Date: Mon, 16 Jun 2025 11:52:58 +0200 Message-ID: <20250616095315.230620-2-ubizjak@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250616095315.230620-1-ubizjak@gmail.com> References: <20250616095315.230620-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Current minimum required version of binutils is 2.30, which supports RDPID instruction mnemonic. Replace the byte-wise specification of RDPID with this proper mnemonic. No functional change intended. Signed-off-by: Uros Bizjak Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" --- arch/x86/include/asm/segment.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h index 93fcf0daba01..f59ae7186940 100644 --- a/arch/x86/include/asm/segment.h +++ b/arch/x86/include/asm/segment.h @@ -255,9 +255,9 @@ static inline void vdso_read_cpunode(unsigned *cpu, unsigned *node) * If RDPID is available, use it. */ alternative_io ("lsl %[seg],%k[p]", - ".byte 0xf3,0x0f,0xc7,0xf8", /* RDPID %eax/rax */ + "rdpid %[p]", X86_FEATURE_RDPID, - [p] "=a" (p), [seg] "r" (__CPUNODE_SEG)); + [p] "=r" (p), [seg] "r" (__CPUNODE_SEG)); if (cpu) *cpu = (p & VDSO_CPUNODE_MASK); -- 2.49.0