From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f51.google.com (mail-ed1-f51.google.com [209.85.208.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 384AB3C34 for ; Sun, 5 Mar 2023 20:57:04 +0000 (UTC) Received: by mail-ed1-f51.google.com with SMTP id g3so30877300eda.1 for ; Sun, 05 Mar 2023 12:57:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678049822; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=25TOpB6uAuDptlCHYXnw8K0sBZK8F7O48wtvqw46Fco=; b=cNd8YqsFIPxe+JP9zRF39U9LVtgmwfXjcFbHH84MFejyyz+WXmA51xlzYADH9AC01W lEszc02CudZI42k7pYdy16Vf4WI6WjE1DZx56EjyaZpyY7FvA1+pVY1RSyjgr+NlrGpr yFwug2e2C37vzQDmuS5CJX+8dF3kzqMWXP62SO1BV9+XSfgAJAzZ1JEkQPQMUXgK2qm4 0hyBNzM1O3Kv/jPXAGYRtlnLBj1s1v9YygYUST1D+zx9Ey2ipnETSfTUq5UPh138ocjy r6cJKI1TIKvZxYHHrTVVuJQaSsFt81JXXkjl01KWi2F25uQE45bvL71Q902loyxf7ehM /C8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678049822; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=25TOpB6uAuDptlCHYXnw8K0sBZK8F7O48wtvqw46Fco=; b=Rah/VHn80BZ9pqkAnuiVTC1IMsjAIomR7MzNq8XFl9j3PZ0UfCVv/v78UkptkyrGym VkeepbguyPL/se8JXB4rAaRSNE8onfTa75bmIxmDPdMFBTjD93pcyyGvIxISTphz2xkv SCK1eiDKZrmxO+l+h/JvZAFar47rneiWKXVV44J5Xyf4UKO6vLwpCoUbXEoODYZWcJzN TXqPjyQEqFCIAfYrQ7OoaFXUWF6Y77GW0gRdFwzaMIJqFdaTPh6d6j251lpxR585fApi 9b9VlLTvyTpL1X8lF0ZpCkFBMODZde69ZR9n3bMt6gaNPDX2Ub5ev5W4jK+IBfingf2n 99yw== X-Gm-Message-State: AO0yUKUavKIhewy8u9BoMM/c9o+i7qCcJtIsKR0fRyg+MZz9R/j/S5R8 DWMzW1xpkfTc443ea5kKojA= X-Google-Smtp-Source: AK7set9H+42xPHqyPW7jGUPzVIpjv1MvOVftLDcjvJIUsaEDkzaQZ+a/sQDSm0+Tof/iIVl2G2SuVg== X-Received: by 2002:a17:906:f18a:b0:887:8f6:c1d7 with SMTP id gs10-20020a170906f18a00b0088708f6c1d7mr8937367ejb.38.1678049822541; Sun, 05 Mar 2023 12:57:02 -0800 (PST) Received: from localhost.localdomain ([46.248.82.114]) by smtp.gmail.com with ESMTPSA id ay24-20020a170906d29800b0090953b9da51sm3615436ejb.194.2023.03.05.12.57.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Mar 2023 12:57:02 -0800 (PST) From: Uros Bizjak To: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Uros Bizjak , Michael Ellerman , Nicholas Piggin , Christophe Leroy Subject: [PATCH 06/10] locking/powerpc: Wire up local_try_cmpxchg Date: Sun, 5 Mar 2023 21:56:24 +0100 Message-Id: <20230305205628.27385-7-ubizjak@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230305205628.27385-1-ubizjak@gmail.com> References: <20230305205628.27385-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement target specific support for local_try_cmpxchg. Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Signed-off-by: Uros Bizjak Signed-off-by: Uros Bizjak --- arch/powerpc/include/asm/local.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h index bc4bd19b7fc2..45492fb5bf22 100644 --- a/arch/powerpc/include/asm/local.h +++ b/arch/powerpc/include/asm/local.h @@ -90,6 +90,17 @@ static __inline__ long local_cmpxchg(local_t *l, long o, long n) return t; } +static __inline__ bool local_try_cmpxchg(local_t *l, long *po, long n) +{ + long o = *po, r; + + r = local_cmpxchg(l, o, n); + if (unlikely(r != o)) + *po = r; + + return likely(r == o); +} + static __inline__ long local_xchg(local_t *l, long n) { long t; -- 2.39.2