From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C92172DCF71 for ; Sun, 14 Dec 2025 08:48:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765702098; cv=none; b=GNFpFLmxXvPPFikGD1guZdRUkaiVz8oQrNC1BTGRvvW0c7ng4RFTpRoo34sxe95yUg/E6ruAwXyWR+644Y3K+DJCU44X2iWTyzEGhAuOQi6arli7zA3UOFxjdw4gXiF04edsH9w/XhhqOR8a8goz+8ULvsCnbNKsiQt989OW2ro= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765702098; c=relaxed/simple; bh=X+xhi+TvkbktMBLdWpTAVwDEfcnUFK25WR8piG9h/+M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hht8/Aa3zR3SGaNmvl6NICssNFulKxjrv1WuLR7dYKNzN/R5dExzp8FeTSyVvJa6z4vnB2dV/EO+PzWgZsyHR1qEEOAYxdognnAb4LrcTuOCUZvk41rT18FEpLT9bSeyvMFwtKwF9oChgOhEyJaR3eG9QS/Dp9gC5ffYRBdNJpo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Slhu8uQM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Slhu8uQM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 395DBC4CEF1; Sun, 14 Dec 2025 08:48:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765702098; bh=X+xhi+TvkbktMBLdWpTAVwDEfcnUFK25WR8piG9h/+M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Slhu8uQMGVxcYV/K0kZTmF2G5XxBPdTFtmOnMjn+7PlOuWKDrSVn9Bpih1Xgq30P6 uljSYrIP5Yw81NEQfuwupf2Sq7qApL7fL1XsIuRVGkZwhk5Yioew/0hm4pUeOjCajl 6PWDDUkI7gyjsp/BkYtFTYgrbBqt0kqMVfbAP8rNrxImWvUN3S/fNAF3kmxAxLOHVl aR0B4cJmCqCMa54OZS+0m29kJF8dkGNlHLHIh+gibBSW9zhrJWR/EEwZjn6dfKzV/H ox8yH205Xc32jEwL/yCy7+zttx1r0NqK/uS4CI9/rP5A8CaLLCNE8Lkkidcg9IY8b1 RuKW6j5oYnH0w== From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , "Ahmed S . Darwish" , Andrew Cooper , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , John Ogness , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Uros Bizjak Subject: [PATCH 15/15] x86/percpu: Remove !CONFIG_X86_CX8 methods Date: Sun, 14 Dec 2025 09:47:03 +0100 Message-ID: <20251214084710.3606385-16-mingo@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251214084710.3606385-1-mingo@kernel.org> References: <20251214084710.3606385-1-mingo@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Uros Bizjak Adjust the constraints to the non-alternatives asm() statement. Signed-off-by: Uros Bizjak Signed-off-by: Ingo Molnar Acked-by: Dave Hansen Cc: "Ahmed S . Darwish" Cc: Andrew Cooper Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Dave Hansen Cc: "H . Peter Anvin" Cc: John Ogness Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lore.kernel.org/r/15696bb3-126b-ef71-f838-80e1e1c1b0aa@gmail.com --- arch/x86/include/asm/percpu.h | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h index 725d0eff7acd..4c84ae0ea261 100644 --- a/arch/x86/include/asm/percpu.h +++ b/arch/x86/include/asm/percpu.h @@ -335,13 +335,10 @@ do { \ old__.var = _oval; \ new__.var = _nval; \ \ - asm_inline qual ( \ - ALTERNATIVE("call this_cpu_cmpxchg8b_emu", \ - "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \ - : ALT_OUTPUT_SP([var] "+m" (__my_cpu_var(_var)), \ - "+a" (old__.low), "+d" (old__.high)) \ - : "b" (new__.low), "c" (new__.high), \ - "S" (&(_var)) \ + asm qual ("cmpxchg8b " __percpu_arg([var]) \ + : "+m" (__my_cpu_var(_var)), \ + "+a" (old__.low), "+d" (old__.high) \ + : "b" (new__.low), "c" (new__.high) \ : "memory"); \ \ old__.var; \ @@ -364,14 +361,12 @@ do { \ old__.var = *_oval; \ new__.var = _nval; \ \ - asm_inline qual ( \ - ALTERNATIVE("call this_cpu_cmpxchg8b_emu", \ - "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \ - : ALT_OUTPUT_SP("=@ccz" (success), \ - [var] "+m" (__my_cpu_var(_var)), \ - "+a" (old__.low), "+d" (old__.high)) \ - : "b" (new__.low), "c" (new__.high), \ - "S" (&(_var)) \ + asm qual ("cmpxchg8b " __percpu_arg([var]) \ + CC_SET(z) \ + : CC_OUT(z) (success), \ + [var] "+m" (__my_cpu_var(_var)), \ + "+a" (old__.low), "+d" (old__.high) \ + : "b" (new__.low), "c" (new__.high) \ : "memory"); \ if (unlikely(!success)) \ *_oval = old__.var; \ -- 2.51.0