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([2001:a61:2553:a401:cfc6:2039:a9ec:21ff]) by smtp.gmail.com with ESMTPSA id dh27sm1084744edb.28.2021.04.05.04.39.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Apr 2021 04:39:38 -0700 (PDT) Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org, libc-alpha@sourceware.org Subject: Re: [PATCH v5 25/35] get_robust_list.2: Use syscall(SYS_...); for system calls without a wrapper To: Alejandro Colomar References: <20210403194026.102818-1-alx.manpages@gmail.com> <20210404115847.78166-26-alx.manpages@gmail.com> From: "Michael Kerrisk (man-pages)" Message-ID: Date: Mon, 5 Apr 2021 13:39:37 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210404115847.78166-26-alx.manpages@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hi ALex, On 4/4/21 1:58 PM, Alejandro Colomar wrote: > Signed-off-by: Alejandro Colomar > --- > man2/get_robust_list.2 | 19 ++++++++----------- > 1 file changed, 8 insertions(+), 11 deletions(-) Patch applied. Thanks, Michael > diff --git a/man2/get_robust_list.2 b/man2/get_robust_list.2 > index dd43cded2..b1368ddd3 100644 > --- a/man2/get_robust_list.2 > +++ b/man2/get_robust_list.2 > @@ -32,16 +32,16 @@ > get_robust_list, set_robust_list \- get/set list of robust futexes > .SH SYNOPSIS > .nf > -.B #include > -.B #include > +.BR "#include " \ > +" /* Definition of " "struct robust_list_head" " */" > +.BR "#include " " /* Definition of " SYS_* " constants */" > +.B #include > .PP > -.BI "long get_robust_list(int " pid ", struct robust_list_head **" head_ptr , > -.BI " size_t *" len_ptr ); > -.BI "long set_robust_list(struct robust_list_head *" head ", size_t " len ); > +.BI "long syscall(SYS_get_robust_list, int " pid , > +.BI " struct robust_list_head **" head_ptr ", size_t *" len_ptr ); > +.BI "long syscall(SYS_set_robust_list," > +.BI " struct robust_list_head *" head ", size_t " len ); > .fi > -.PP > -.IR Note : > -There are no glibc wrappers for these system calls; see NOTES. > .SH DESCRIPTION > These system calls deal with per-thread robust futex lists. > These lists are managed in user space: > @@ -138,9 +138,6 @@ could be found. > These system calls were added in Linux 2.6.17. > .SH NOTES > These system calls are not needed by normal applications. > -No support for them is provided in glibc. > -In the unlikely event that you want to call them directly, use > -.BR syscall (2). > .PP > A thread can have only one robust futex list; > therefore applications that wish > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/