From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27664CA90AF for ; Wed, 13 May 2020 11:21:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1D9F20753 for ; Wed, 13 May 2020 11:21:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZynZ/iRc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732597AbgEMLVR (ORCPT ); Wed, 13 May 2020 07:21:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732496AbgEMLVR (ORCPT ); Wed, 13 May 2020 07:21:17 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C7B6C061A0C; Wed, 13 May 2020 04:21:17 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id w7so20417603wre.13; Wed, 13 May 2020 04:21:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=cc:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=jJGX0HJKQeSAIMx0QuPyHcLf5tHScfVxF8rrxRd+KcI=; b=ZynZ/iRcE0VPeKlcjAMhPW8FoWXbPsrMrp76LsfHrGYN2u3Aukqnhr/FYgUuZwsyti LbMvSIvBRKKFzO0BIAPm7go2rDQ/ImA2r0BlzSHGP91Rmsi1BAxy7Lbp77tlyrbxy5s6 GDMoaqNZP3JoYQJLEVpBRcWeiDZ59FQqW4GOZWp1GcRnkh/+zPTYtmmcxb4ja4J9D4Xc 6P4m+vWgs2mutMmnRfjGmup8qM4InsR04ZOd+qvCNiiFpySEezRW1/r6/+6R6eO6iXEB OoAt03DuTK6RyIjfySFsS/BgEJcN1ICg2zq0RyjMGtlM4v8MvzzGMMcBC6tEojtvrZT0 qwiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:cc:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=jJGX0HJKQeSAIMx0QuPyHcLf5tHScfVxF8rrxRd+KcI=; b=GIXF0mg9KePDICcFkIRuEuIFRaHnnq5dOSgoXdWr12Mr1StvbAtl6gujG5kVutd11y /xrr7gkWClWqkngcB2ciMqP+H2QLvZluoL5T6HII7iElOWfN7sA3z+jj6xTNB/+Mn6kW FQy8ORqeNmgqAjFfshbJnHIE+R7+aFm8fxyfn+5csdbCyRugl1ymJzEKBdIka2NqrR/j rqypxqD6sXyJiZVJTOmJjB4XUOQnIcR9hjGMBhHpsr+KL2lUYZiYe2GGEScGy+PL6TGH /fzX/ttbJAXv3RY1pvaAGRf99rU1KEvhx4im0aTNjiY1M3olsfBGP3A6jdKBwi/o/0OF 6zQg== X-Gm-Message-State: AOAM532b1hQJOkF8thipm87jszNkPdXYtgTydIOpSGjqHRhpmO8d65ZV J7AqoU16XXQCITLoz3FYNuNXfjaG X-Google-Smtp-Source: ABdhPJx156skmH5/zruMIOwqYcn513DkFzRi+VMhpVx38bixqxdbWVhqP/3Rq3nuEfRvduOHtOamuw== X-Received: by 2002:a5d:4491:: with SMTP id j17mr7984918wrq.41.1589368875933; Wed, 13 May 2020 04:21:15 -0700 (PDT) Received: from ?IPv6:2001:a61:2482:101:a081:4793:30bf:f3d5? ([2001:a61:2482:101:a081:4793:30bf:f3d5]) by smtp.gmail.com with ESMTPSA id i17sm35842104wml.23.2020.05.13.04.21.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 May 2020 04:21:15 -0700 (PDT) Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Tim Chen , Thomas Gleixner Subject: Re: [PATCH 10/14] prctl.2: Add PR_SPEC_INDIRECT_BRANCH for SPECULATION_CTRL prctls To: Dave Martin References: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> <1589301419-24459-11-git-send-email-Dave.Martin@arm.com> From: "Michael Kerrisk (man-pages)" Message-ID: Date: Wed, 13 May 2020 13:21:12 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <1589301419-24459-11-git-send-email-Dave.Martin@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hello Dave, On 5/12/20 6:36 PM, Dave Martin wrote: > Add the PR_SPEC_INDIRECT_BRANCH "misfeature" added in Linux 4.20 > for PR_SET_SPECULATION_CTRL and PR_GET_SPECULATION_CTRL. > > Signed-off-by: Dave Martin > Cc: Tim Chen > Cc: Thomas Gleixner Thanks. Patch applied, but not yet pushed while I wait to see if any Review/Ack arrives. Also, could you please check the tweaks I note below. > --- > man2/prctl.2 | 24 ++++++++++++++++++------ > 1 file changed, 18 insertions(+), 6 deletions(-) > > diff --git a/man2/prctl.2 b/man2/prctl.2 > index e8eaf95..66417cf 100644 > --- a/man2/prctl.2 > +++ b/man2/prctl.2 > @@ -1213,11 +1213,20 @@ arguments must be specified as 0; otherwise the call fails with the error > .\" commit 356e4bfff2c5489e016fdb925adbf12a1e3950ee > Sets the state of the speculation misfeature specified in > .IR arg2 . > -Currently, the only permitted value for this argument is > +Currently, this argument must be one of: > +.RS > +.TP > .B PR_SPEC_STORE_BYPASS > -(otherwise the call fails with the error > +speculative store bypass control, or s/speculative/enable speculative/ > +.\" commit 9137bb27e60e554dab694eafa4cca241fa3a694f > +.TP > +.BR PR_SPEC_INDIRECT_BRANCH " (since Linux 4.20)" > +indirect branch speculation control. s/indirect/enable indirect/ > +.RE > +.IP > +(Otherwise the call fails with the error > .BR ENODEV ). > -This setting is a per-thread attribute. > +These settings are per-thread attributes. > The > .IR arg3 > argument is used to hand in the control value, > @@ -1235,13 +1244,16 @@ Same as > .BR PR_SPEC_DISABLE , > but cannot be undone. > A subsequent > -.B > -prctl(..., PR_SPEC_ENABLE) > +.BR prctl (\c > +.IR arg2 , > +.BR PR_SPEC_ENABLE ) > +with the same value for > +.I arg2 > will fail with the error > .BR EPERM . > .RE > .IP > -Any other value in > +Any unsupported value in > .IR arg3 > will result in the call failing with the error > .BR ERANGE . Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Kerrisk (man-pages)" Subject: Re: [PATCH 10/14] prctl.2: Add PR_SPEC_INDIRECT_BRANCH for SPECULATION_CTRL prctls Date: Wed, 13 May 2020 13:21:12 +0200 Message-ID: References: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> <1589301419-24459-11-git-send-email-Dave.Martin@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1589301419-24459-11-git-send-email-Dave.Martin-5wv7dgnIgG8@public.gmane.org> Content-Language: en-US Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Dave Martin Cc: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Tim Chen , Thomas Gleixner List-Id: linux-arch.vger.kernel.org Hello Dave, On 5/12/20 6:36 PM, Dave Martin wrote: > Add the PR_SPEC_INDIRECT_BRANCH "misfeature" added in Linux 4.20 > for PR_SET_SPECULATION_CTRL and PR_GET_SPECULATION_CTRL. > > Signed-off-by: Dave Martin > Cc: Tim Chen > Cc: Thomas Gleixner Thanks. Patch applied, but not yet pushed while I wait to see if any Review/Ack arrives. Also, could you please check the tweaks I note below. > --- > man2/prctl.2 | 24 ++++++++++++++++++------ > 1 file changed, 18 insertions(+), 6 deletions(-) > > diff --git a/man2/prctl.2 b/man2/prctl.2 > index e8eaf95..66417cf 100644 > --- a/man2/prctl.2 > +++ b/man2/prctl.2 > @@ -1213,11 +1213,20 @@ arguments must be specified as 0; otherwise the call fails with the error > .\" commit 356e4bfff2c5489e016fdb925adbf12a1e3950ee > Sets the state of the speculation misfeature specified in > .IR arg2 . > -Currently, the only permitted value for this argument is > +Currently, this argument must be one of: > +.RS > +.TP > .B PR_SPEC_STORE_BYPASS > -(otherwise the call fails with the error > +speculative store bypass control, or s/speculative/enable speculative/ > +.\" commit 9137bb27e60e554dab694eafa4cca241fa3a694f > +.TP > +.BR PR_SPEC_INDIRECT_BRANCH " (since Linux 4.20)" > +indirect branch speculation control. s/indirect/enable indirect/ > +.RE > +.IP > +(Otherwise the call fails with the error > .BR ENODEV ). > -This setting is a per-thread attribute. > +These settings are per-thread attributes. > The > .IR arg3 > argument is used to hand in the control value, > @@ -1235,13 +1244,16 @@ Same as > .BR PR_SPEC_DISABLE , > but cannot be undone. > A subsequent > -.B > -prctl(..., PR_SPEC_ENABLE) > +.BR prctl (\c > +.IR arg2 , > +.BR PR_SPEC_ENABLE ) > +with the same value for > +.I arg2 > will fail with the error > .BR EPERM . > .RE > .IP > -Any other value in > +Any unsupported value in > .IR arg3 > will result in the call failing with the error > .BR ERANGE . Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4833C2D0FA for ; Wed, 13 May 2020 11:21:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A9BEF2176D for ; Wed, 13 May 2020 11:21:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="us7K9jw1"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZynZ/iRc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9BEF2176D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Hj07+tD7tm5W1Vl+Lf9LsH0ryqCtJNntfbxP7eNLrGo=; b=us7K9jw1PMKnzU uUtQWeWxSKec+JgihOMLdLtxrSYdmfk68kqHQxo4yLxgMFifxib0fh6vpQQn83GuG6NnePIbQzfNm QnKHv3GmeO8ZkNIr1e5uejfEVIRGYYTdluN+5PS7IL5Y9L/DFwf/5XMg/8tYMFpbjPSvVjE8SWC5c TGnjrvGWLdT4f5+hKLl2ZJ5MaS8o1l/bktSfs5atwVd6cF5cOkpDUWV7HWzNFoI0OAELE6HwWIZq9 qYsL8bUsGcLNRnEEtEByVTRqTxneJfaT+mQL+t11Q/ZofA+86GvROrVRDBqs/LmEG0b6DfmSJoUaN kn39fm2V2L0sI1W4HE4Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYpRx-0003Q7-B3; Wed, 13 May 2020 11:21:21 +0000 Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYpRt-0003P3-HE for linux-arm-kernel@lists.infradead.org; Wed, 13 May 2020 11:21:19 +0000 Received: by mail-wr1-x441.google.com with SMTP id l11so14494284wru.0 for ; Wed, 13 May 2020 04:21:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=cc:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=jJGX0HJKQeSAIMx0QuPyHcLf5tHScfVxF8rrxRd+KcI=; b=ZynZ/iRcE0VPeKlcjAMhPW8FoWXbPsrMrp76LsfHrGYN2u3Aukqnhr/FYgUuZwsyti LbMvSIvBRKKFzO0BIAPm7go2rDQ/ImA2r0BlzSHGP91Rmsi1BAxy7Lbp77tlyrbxy5s6 GDMoaqNZP3JoYQJLEVpBRcWeiDZ59FQqW4GOZWp1GcRnkh/+zPTYtmmcxb4ja4J9D4Xc 6P4m+vWgs2mutMmnRfjGmup8qM4InsR04ZOd+qvCNiiFpySEezRW1/r6/+6R6eO6iXEB OoAt03DuTK6RyIjfySFsS/BgEJcN1ICg2zq0RyjMGtlM4v8MvzzGMMcBC6tEojtvrZT0 qwiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:cc:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=jJGX0HJKQeSAIMx0QuPyHcLf5tHScfVxF8rrxRd+KcI=; b=B3rzi/xwrHMKoSMR8IkVU0h5I7ZTcBO+6hGjj6FFwtzK8I0/k9y4cOq8Xo5Pnh3LVC 2fTWyYTr7P+Xs0PeRTq8m7f2++DdKaMuopB+hyfVBzZZxNV/3DOEJMeY1jYtxLw1kbLA ejpFhUjWbeAWPLLNF+nFdJO+SqqneGsEKblHr/bxZN+vwmr0Q0iRM06HhbIKhmwZ8UN6 QNFf9pB1VT0SdyDxaCi+BLVs80DmOECn30cPTCgYaQaLiv7QQxJTWtTNUxCNlwTF1G27 FhCpbVzXH2ISBwZvuybLmqA7n8sFikMhlXl/Grbu60+NWafzZj85qW4LK+tcj6re4Lb1 KjRw== X-Gm-Message-State: AOAM530wu5mj9eLanmmHmhCapaPYzEZxbhhKSBMu7faONgTHVug+QdWV cG0ZcVbE9Wmpy/CYdT4Ybpw= X-Google-Smtp-Source: ABdhPJx156skmH5/zruMIOwqYcn513DkFzRi+VMhpVx38bixqxdbWVhqP/3Rq3nuEfRvduOHtOamuw== X-Received: by 2002:a5d:4491:: with SMTP id j17mr7984918wrq.41.1589368875933; Wed, 13 May 2020 04:21:15 -0700 (PDT) Received: from ?IPv6:2001:a61:2482:101:a081:4793:30bf:f3d5? ([2001:a61:2482:101:a081:4793:30bf:f3d5]) by smtp.gmail.com with ESMTPSA id i17sm35842104wml.23.2020.05.13.04.21.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 May 2020 04:21:15 -0700 (PDT) Subject: Re: [PATCH 10/14] prctl.2: Add PR_SPEC_INDIRECT_BRANCH for SPECULATION_CTRL prctls To: Dave Martin References: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> <1589301419-24459-11-git-send-email-Dave.Martin@arm.com> From: "Michael Kerrisk (man-pages)" Message-ID: Date: Wed, 13 May 2020 13:21:12 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <1589301419-24459-11-git-send-email-Dave.Martin@arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200513_042117_572790_B5E8A955 X-CRM114-Status: GOOD ( 20.65 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-man@vger.kernel.org, mtk.manpages@gmail.com, Thomas Gleixner , Tim Chen , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello Dave, On 5/12/20 6:36 PM, Dave Martin wrote: > Add the PR_SPEC_INDIRECT_BRANCH "misfeature" added in Linux 4.20 > for PR_SET_SPECULATION_CTRL and PR_GET_SPECULATION_CTRL. > > Signed-off-by: Dave Martin > Cc: Tim Chen > Cc: Thomas Gleixner Thanks. Patch applied, but not yet pushed while I wait to see if any Review/Ack arrives. Also, could you please check the tweaks I note below. > --- > man2/prctl.2 | 24 ++++++++++++++++++------ > 1 file changed, 18 insertions(+), 6 deletions(-) > > diff --git a/man2/prctl.2 b/man2/prctl.2 > index e8eaf95..66417cf 100644 > --- a/man2/prctl.2 > +++ b/man2/prctl.2 > @@ -1213,11 +1213,20 @@ arguments must be specified as 0; otherwise the call fails with the error > .\" commit 356e4bfff2c5489e016fdb925adbf12a1e3950ee > Sets the state of the speculation misfeature specified in > .IR arg2 . > -Currently, the only permitted value for this argument is > +Currently, this argument must be one of: > +.RS > +.TP > .B PR_SPEC_STORE_BYPASS > -(otherwise the call fails with the error > +speculative store bypass control, or s/speculative/enable speculative/ > +.\" commit 9137bb27e60e554dab694eafa4cca241fa3a694f > +.TP > +.BR PR_SPEC_INDIRECT_BRANCH " (since Linux 4.20)" > +indirect branch speculation control. s/indirect/enable indirect/ > +.RE > +.IP > +(Otherwise the call fails with the error > .BR ENODEV ). > -This setting is a per-thread attribute. > +These settings are per-thread attributes. > The > .IR arg3 > argument is used to hand in the control value, > @@ -1235,13 +1244,16 @@ Same as > .BR PR_SPEC_DISABLE , > but cannot be undone. > A subsequent > -.B > -prctl(..., PR_SPEC_ENABLE) > +.BR prctl (\c > +.IR arg2 , > +.BR PR_SPEC_ENABLE ) > +with the same value for > +.I arg2 > will fail with the error > .BR EPERM . > .RE > .IP > -Any other value in > +Any unsupported value in > .IR arg3 > will result in the call failing with the error > .BR ERANGE . Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel