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([2001:a61:2482:101:a081:4793:30bf:f3d5]) by smtp.gmail.com with ESMTPSA id p8sm26376188wre.11.2020.05.13.03.11.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 May 2020 03:11:58 -0700 (PDT) Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Dave Hansen , Thomas Gleixner Subject: Re: [PATCH 07/14] prctl.2: Document removal of Intel MPX prctls To: Dave Martin References: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> <1589301419-24459-8-git-send-email-Dave.Martin@arm.com> From: "Michael Kerrisk (man-pages)" Message-ID: <3201c6e6-bd9e-aef4-fae5-70229e1b1abe@gmail.com> Date: Wed, 13 May 2020 12:11:57 +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: <1589301419-24459-8-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 On 5/12/20 6:36 PM, Dave Martin wrote: > The Intel MPX API was removed from Linux 5.4. See Linux > commit f240652b6032 ("x86/mpx: Remove MPX APIs") > > Document this change. Thanks. Patch applied, with Dave H's Acked-by. Cheers, Michael > Signed-off-by: Dave Martin > Cc: Dave Hansen > Cc: Thomas Gleixner > --- > man2/prctl.2 | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/man2/prctl.2 b/man2/prctl.2 > index 7a3fc5c..a84fb1d 100644 > --- a/man2/prctl.2 > +++ b/man2/prctl.2 > @@ -784,7 +784,7 @@ option enabled. > .RE > .\" prctl PR_MPX_ENABLE_MANAGEMENT > .TP > -.BR PR_MPX_ENABLE_MANAGEMENT ", " PR_MPX_DISABLE_MANAGEMENT " (since Linux 3.19) " > +.BR PR_MPX_ENABLE_MANAGEMENT ", " PR_MPX_DISABLE_MANAGEMENT " (since Linux 3.19, removed in Linux 5.4; only on x86) " > .\" commit fe3d197f84319d3bce379a9c0dc17b1f48ad358c > .\" See also http://lwn.net/Articles/582712/ > .\" See also https://gcc.gnu.org/wiki/Intel%20MPX%20support%20in%20the%20GCC%20compiler > @@ -859,6 +859,12 @@ had been called. > .IP > For further information on Intel MPX, see the kernel source file > .IR Documentation/x86/intel_mpx.txt . > +.IP > +.\" commit f240652b6032b48ad7fa35c5e701cc4c8d697c0b > +.\" See also https://lkml.kernel.org/r/20190705175321.DB42F0AD@viggo.jf.intel.com > +Due to a lack of toolchain support, > +.BR PR_MPX_ENABLE_MANAGEMENT " and " PR_MPX_DISABLE_MANAGEMENT > +are not supported by Linux 5.4 or later. > .\" prctl PR_SET_NAME > .TP > .BR PR_SET_NAME " (since Linux 2.6.9)" > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/