From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Alejandro Colomar <alx.manpages@gmail.com>
Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
linux-man <linux-man@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
glibc <libc-alpha@sourceware.org>, GCC <gcc-patches@gcc.gnu.org>,
bpf <bpf@vger.kernel.org>, David Laight <David.Laight@aculab.com>,
Zack Weinberg <zackw@panix.com>,
Joseph Myers <joseph@codesourcery.com>
Subject: Re: [RFC v2] bpf.2: Use standard types and attributes
Date: Tue, 4 May 2021 07:12:01 -0700 [thread overview]
Message-ID: <CAADnVQLdW=jH1CUP02jokEu3Sh+=xKsCXvjA19kfz7KOn9mzkA@mail.gmail.com> (raw)
In-Reply-To: <20210504110519.16097-1-alx.manpages@gmail.com>
On Tue, May 4, 2021 at 4:05 AM Alejandro Colomar <alx.manpages@gmail.com> wrote:
>
> Some manual pages are already using C99 syntax for integral
> types 'uint32_t', but some aren't. There are some using kernel
> syntax '__u32'. Fix those.
>
> Some pages also document attributes, using GNU syntax
> '__attribute__((xxx))'. Update those to use the shorter and more
> portable C11 keywords such as 'alignas()' when possible, and C2x
> syntax '[[gnu::xxx]]' elsewhere, which hasn't been standardized
> yet, but is already implemented in GCC, and available through
> either --std=c2x or any of the --std=gnu... options.
>
> The standard isn't very clear on how to use alignas() or
> [[]]-style attributes, so the following link is useful in the case
> of 'alignas()' and '[[gnu::aligned()]]':
> <https://stackoverflow.com/q/67271825/6872717>
>
> Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
> Cc: LKML <linux-kernel@vger.kernel.org>
> Cc: glibc <libc-alpha@sourceware.org>
> Cc: GCC <gcc-patches@gcc.gnu.org>
> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
> Cc: bpf <bpf@vger.kernel.org>
> Cc: David Laight <David.Laight@ACULAB.COM>
> Cc: Zack Weinberg <zackw@panix.com>
> Cc: Joseph Myers <joseph@codesourcery.com>
> ---
> man2/bpf.2 | 49 ++++++++++++++++++++++++-------------------------
> 1 file changed, 24 insertions(+), 25 deletions(-)
>
> diff --git a/man2/bpf.2 b/man2/bpf.2
> index 6e1ffa198..04b8fbcef 100644
> --- a/man2/bpf.2
> +++ b/man2/bpf.2
> @@ -186,41 +186,40 @@ commands:
> .PP
> .in +4n
> .EX
> -union bpf_attr {
> +union [[gnu::aligned(8)]] bpf_attr {
> struct { /* Used by BPF_MAP_CREATE */
> - __u32 map_type;
> - __u32 key_size; /* size of key in bytes */
> - __u32 value_size; /* size of value in bytes */
> - __u32 max_entries; /* maximum number of entries
> - in a map */
> + uint32_t map_type;
> + uint32_t key_size; /* size of key in bytes */
> + uint32_t value_size; /* size of value in bytes */
> + uint32_t max_entries; /* maximum number of entries
> + in a map */
For the same reasons as explained earlier:
Nacked-by: Alexei Starovoitov <ast@kernel.org>
next prev parent reply other threads:[~2021-05-04 14:12 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 23:06 [RFC] bpf.2: Use standard types and attributes Alejandro Colomar
2021-04-23 23:20 ` Alexei Starovoitov
2021-04-24 17:56 ` Alejandro Colomar (man-pages)
2021-04-25 16:52 ` Alexei Starovoitov
2021-04-25 19:12 ` Zack Weinberg
2021-04-24 20:43 ` David Laight
2021-04-25 19:16 ` Zack Weinberg
2021-04-25 21:09 ` David Laight
2021-04-26 17:19 ` Joseph Myers
2021-04-26 17:46 ` Alejandro Colomar (man-pages)
2021-05-04 11:05 ` [RFC v2] " Alejandro Colomar
2021-05-04 14:12 ` Alexei Starovoitov [this message]
2021-05-04 14:24 ` Greg KH
2021-05-04 15:53 ` Alejandro Colomar (man-pages)
2021-05-04 16:06 ` Greg KH
2021-05-04 18:37 ` Zack Weinberg
2021-05-04 18:54 ` Alejandro Colomar (man-pages)
2021-05-04 19:45 ` Florian Weimer
2021-05-04 19:59 ` Alejandro Colomar (man-pages)
2021-05-05 8:23 ` David Laight
2021-05-05 22:22 ` Joseph Myers
2021-05-04 20:06 ` Daniel Borkmann
2021-05-04 20:16 ` Alejandro Colomar (man-pages)
2021-05-04 20:33 ` Zack Weinberg
2021-05-04 21:23 ` Alexei Starovoitov
2021-05-15 19:01 ` [PATCH v3] " Alejandro Colomar
2021-05-16 9:16 ` Alejandro Colomar (man-pages)
2021-05-17 18:56 ` Daniel Borkmann
2021-05-21 11:12 ` Alejandro Colomar
2021-05-04 16:08 ` [RFC v2] " Daniel Borkmann
2022-08-24 18:55 ` [LTP] [PATCH v3] Many pages: Document fixed-width types with ISO C naming Alejandro Colomar
2022-08-24 18:55 ` Alejandro Colomar
2022-08-24 22:40 ` Alexei Starovoitov
2022-08-24 22:40 ` [LTP] " Alexei Starovoitov
2022-08-24 23:36 ` Alejandro Colomar
2022-08-24 23:36 ` [LTP] " Alejandro Colomar
2022-08-25 0:52 ` Linus Torvalds
2022-08-25 0:52 ` Linus Torvalds
2022-08-25 7:20 ` [LTP] " Alejandro Colomar
2022-08-25 7:20 ` Alejandro Colomar
2022-08-25 7:28 ` Xi Ruoyao
2022-08-25 7:28 ` [LTP] " Xi Ruoyao via ltp
2022-08-25 7:48 ` Alejandro Colomar
2022-08-25 7:48 ` Alejandro Colomar
2022-08-25 8:09 ` Xi Ruoyao
2022-08-25 8:09 ` [LTP] " Xi Ruoyao via ltp
2022-08-25 7:42 ` Linus Torvalds
2022-08-25 7:42 ` Linus Torvalds
2022-08-25 7:59 ` [LTP] " Alejandro Colomar
2022-08-25 7:59 ` Alejandro Colomar
2022-08-25 5:57 ` [LTP] " Greg Kroah-Hartman
2022-08-25 5:57 ` Greg Kroah-Hartman
2022-08-25 6:41 ` Florian Weimer
2022-08-25 6:41 ` [LTP] " Florian Weimer
2022-08-25 7:27 ` Linus Torvalds
2022-08-25 7:27 ` [LTP] " Linus Torvalds
2022-08-25 14:38 ` Joseph Myers
2022-08-25 14:38 ` [LTP] " Joseph Myers
2022-08-25 15:01 ` David Laight
2022-08-25 15:01 ` David Laight
2022-08-25 15:37 ` Joseph Myers
2022-08-25 15:37 ` [LTP] " Joseph Myers
2022-08-25 16:43 ` Linus Torvalds
2022-08-25 16:43 ` Linus Torvalds
2022-08-25 7:44 ` [LTP] " Alejandro Colomar
2022-08-25 7:44 ` Alejandro Colomar
2022-08-25 8:04 ` [LTP] " Alejandro Colomar
2022-08-25 8:04 ` Alejandro Colomar
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