From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f48.google.com (mail-ej1-f48.google.com [209.85.218.48]) (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 00A49443AA0 for ; Mon, 10 Aug 2026 19:40:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786390835; cv=none; b=bzpmKFxVAo5JlFauqEplIVXL6cu2wKhMLpOLoSmvPFcv0toUbLOSYxHoDTbwyBJ2M1UQHymdy9ifWxrABVJdY2zDubX6P0uG+zWfSHJ7Ezea9SHUIu5PFkblwlLZfLQx9ekUv3MDUno5Gvb5+r9N++5TZ8VIs4SYPaqvKU6tjT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786390835; c=relaxed/simple; bh=SPL4waYZ68I07oMi9zqix6oLnOBZXLRhkO7049FeIOs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lsD7Q0aCo2MiTR5XKNVUiCBoSzFflehylCtzC/BoQYC/JChMqky7lDLrHotgvzEB5b5WfAfOO6XzQ51YYzWBz6RE0kA3BLHYH2+MtbaenbvNieg2Pryl9ApnM+vIN9Bo7BB1mtCMIbsLNUtYobRa2b7eoEvuUkMRFM9Kd4+x9kc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=OhCqFi6U; arc=none smtp.client-ip=209.85.218.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="OhCqFi6U" Received: by mail-ej1-f48.google.com with SMTP id a640c23a62f3a-c167aa9500dso2930466b.3 for ; Mon, 10 Aug 2026 12:40:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786390817; x=1786995617; darn=vger.kernel.org; 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:content-type; bh=cPXRarnAO1rxE2tnGzCY8f31rq9Ep14HorPF8zSq0IU=; b=OhCqFi6UtJdECMQe/r3cWXui8d7fzyM7NFq1YW3hBuE8bPwf3PA72L47soGZa6xj6p 7xC/gxrRJAtKZb+5mYJZrPEi9KUVuzc+/YpJM2n1oWlEkw2dzKIEoraygiETm0oi0v/S lS6MCWZUNGrHp/3X1Hb4JCi0ZTbzdrNfo0jNTLRhefGbtEJFQpX+6LtL3m9ZTzEpqch7 buqCzIzbfv4h/1P1Kar/R1LBAKdVdAcnxs+lPKt6748TkGC98o2NnjW5ygnp/BvCXbqU vZFccBXWCKmnHTzW6cvFvqJ9tH+b6drCRqIvdgc6wW9LYA5Uj0FgTsNcP9C4TVkUaCg+ CqhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786390817; x=1786995617; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=cPXRarnAO1rxE2tnGzCY8f31rq9Ep14HorPF8zSq0IU=; b=T6fq9GxgB3D7O/2q5JwlihGIeF5dBMd5TSSW+tCXSL7z4nONxSecJ2fX+WDkK+h41L VMnax7x/BUsNHrI4EyCTEJ8ctyaj7Sl9hdkicDROMsSEVJoEmtlMnbdej4j6OPb3YBaZ F6oGeViRXsc0SsY87etZZWalIHxMQFYu09uAPS17KU8FzgK3qFiJ8JBJw5TTTWV/eQp2 rb2s6B2kBQamM++/kakmNNF6sF62WolHYq8SBg5Qmf3wpT4a/J/l3OKRmZVVlioAI32U XCtDIOkme7EBkh3vHcHDl69SWkwmbSDSGTq3J051b20rH+SdMpGWS1wSH3Dzd71RkKzf FW/A== X-Forwarded-Encrypted: i=1; AHgh+Rp2bGeng0APkc7RGLxvp8FmpS6tGrZ/rPmNEutDP3ZjcA29nCvGd4oFvAWO9L3n5YIrcihpi0pfRdINGis=@vger.kernel.org X-Gm-Message-State: AOJu0YyWzhJ7ZGxDaxaliKBtoAhboz7bYO88ApVu5pWKiUvkcY+nLVI1 5WSmZhK1IEcUnrBbqjo9vWrSVzMCyNYp/UiqnHi8KltFAsNneAXfRacP59+4khzi X-Gm-Gg: AR+sD10Sx9W0fDNiHFTKait5MV+FuYCl2VzXk/g8d9XYnmdr9GvNXQSnJv+cjarL533 Qe+UWcbsZ3wXMGqjAVARSmWuOLpVEr2ngQayYwLwyUo4wzc41il2c4nqXLCYIYPWYMv+yRaAEXI snJRtCUsqaPXbbkuBmk1d3hPwcTPkVucAb6NipyzRz3gUNURnJ2WTh5ML9EVsvT23XUIvNkpMIf io/ytsff6daNJoJef1vfKhXJ9oNN0oX0G3V0FYbWVkm46cv3UqgBzGSZ9fflCcQPL5PAe6td7Hq ZxTXl5dcXADviqSkHEb2IJSGUe6+n9XoaTXf+GKrT25cBED3fk7oMJAeSxQZenmBHNPpQMYlY8u VT2ttXuOG6G/55sduCshJqLn0y6RpChjsUVWeQl8X4Lp02Pf0UaDKIlHCJ4G3GeXIMNMgHSQxlY pyPqXMp+/c1MSzeJW19kfi6TCFihZTgRE3xXi5Kt+jItSW/fxZHkmzBGp3gk71QYox46Jwt2q0I bOg4qs+UB7RjwD9z322wJP+QlTlDT0= X-Received: by 2002:a17:907:3f05:b0:c1a:5d49:f99d with SMTP id a640c23a62f3a-c2039c03342mr1839607366b.7.1786390817019; Mon, 10 Aug 2026 12:40:17 -0700 (PDT) Received: from buildhost.darklands.se ([2001:9b1:ff:d701:51eb:176f:63d9:53f8]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c2080a29a84sm449928966b.3.2026.08.10.12.40.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 12:40:16 -0700 (PDT) From: Magnus Lindholm To: richard.henderson@linaro.org, mattst88@gmail.com, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org Cc: glaubitz@physik.fu-berlin.de, mcree@orcon.net.nz, ink@unseen.parts, macro@orcam.me.uk, Magnus Lindholm , stable@vger.kernel.org Subject: [PATCH v2 4/7] alpha: invalidate the local context in flush_tlb_page() Date: Mon, 10 Aug 2026 21:34:55 +0200 Message-ID: <20260810193902.3286353-5-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260810193902.3286353-1-linmag7@gmail.com> References: <20260810193902.3286353-1-linmag7@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 When the target mm is not current, flush_tlb_page() does nothing locally, and smp_call_function() reaches only the other CPUs. This CPU may still hold translations for the mm and can later reuse the old ASN together with them. Add the missing else branch. flush_tlb_other() clears mm->context[cpu] so a fresh ASN is taken at the next switch. With the previous patch this also covers a lazily borrowed mm, which no longer takes the targeted path. The uniprocessor implementations of flush_tlb_mm() and flush_icache_user_page() in asm/tlbflush.h and asm/cacheflush.h already contain exactly this branch. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Magnus Lindholm --- arch/alpha/kernel/smp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c index 7856d23b3384..a5a42ae4a7d8 100644 --- a/arch/alpha/kernel/smp.c +++ b/arch/alpha/kernel/smp.c @@ -698,6 +698,9 @@ flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) preempt_enable(); return; } + } else { + /* smp_call_function() does not call back into this CPU. */ + flush_tlb_other(mm); } data.vma = vma; -- 2.53.0