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[209.132.180.67]) by mx.google.com with ESMTP id v6si6934896oix.67.2020.03.31.09.05.55; Tue, 31 Mar 2020 09:06:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@c-s.fr header.s=mail header.b=wHDzmtI3; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731234AbgCaQET (ORCPT + 99 others); Tue, 31 Mar 2020 12:04:19 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:63917 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731253AbgCaQDl (ORCPT ); Tue, 31 Mar 2020 12:03:41 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 48sDdl1NYYz9twdZ; Tue, 31 Mar 2020 18:03:39 +0200 (CEST) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=wHDzmtI3; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id RUXVmZQCXCTh; Tue, 31 Mar 2020 18:03:39 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 48sDdl0MQbz9twdT; Tue, 31 Mar 2020 18:03:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1585670619; bh=6dnGmEP9kaYDu3frjLwq4tVxGR7ljMwwBq0u7Py+ixo=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=wHDzmtI3V9cWHr3qGCm13i2VIkk8rPqqIdSzI4Lk2Gwqr+2ewxYhwIXQgpFTAO9Ue E9tb1oI+RAypim8lEbsIQMPfwQgKIXmVbekJrQ833H5EiosPy45ZQEvQgOcUfa0LSr xH6W1ranwAOD+QrKNapFZfg0RNJFggXEA8y8S57A= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id AC9D18B868; Tue, 31 Mar 2020 18:03:40 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id cwxwwFWIHa4z; Tue, 31 Mar 2020 18:03:40 +0200 (CEST) Received: from pc16570vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 6FFC38B752; Tue, 31 Mar 2020 18:03:40 +0200 (CEST) Received: by pc16570vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 60447656AC; Tue, 31 Mar 2020 16:03:40 +0000 (UTC) Message-Id: In-Reply-To: <1ae02b6637b87fc5aaa1d5012c3e2cb30e62b4a3.1585670437.git.christophe.leroy@c-s.fr> References: <1ae02b6637b87fc5aaa1d5012c3e2cb30e62b4a3.1585670437.git.christophe.leroy@c-s.fr> From: Christophe Leroy Subject: [PATCH v2 05/12] powerpc/mem: Blacklist flush_dcache_icache_phys() for kprobe To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , naveen.n.rao@linux.vnet.ibm.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Tue, 31 Mar 2020 16:03:40 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kprobe does not handle events happening in real mode, all functions running with MMU disabled have to be blacklisted. Signed-off-by: Christophe Leroy Acked-by: Naveen N. Rao --- arch/powerpc/mm/mem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 9b4f5fb719e0..bcb6af6ba29a 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -466,6 +467,7 @@ static void flush_dcache_icache_phys(unsigned long physaddr) : "r" (nb), "r" (msr), "i" (bytes), "r" (msr0) : "ctr", "memory"); } +NOKPROBE_SYMBOL(flush_dcache_icache_phys) #endif // !defined(CONFIG_PPC_8xx) && !defined(CONFIG_PPC64) /* -- 2.25.0