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From: Adrian Reber <adrian@lisas.de>
To: Christoph Hellwig <hch@lst.de>
Cc: viro@zeniv.linux.org.uk, Avi Kivity <avi@scylladb.com>,
	linux-aio@kvack.org, linux-fsdevel@vger.kernel.org,
	linux-api@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 7/7] aio: implement io_pgetevents
Date: Wed, 4 Jul 2018 16:21:16 +0200	[thread overview]
Message-ID: <20180704142116.GM17048@lisas.de> (raw)
In-Reply-To: <20180502211448.18276-8-hch@lst.de>

On Wed, May 02, 2018 at 11:14:48PM +0200, Christoph Hellwig wrote:
> This is the io_getevents equivalent of ppoll/pselect and allows to
> properly mix signals and aio completions (especially with IOCB_CMD_POLL)
> and atomically executes the following sequence:
> 
> 	sigset_t origmask;
> 
> 	pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
> 	ret = io_getevents(ctx, min_nr, nr, events, timeout);
> 	pthread_sigmask(SIG_SETMASK, &origmask, NULL);
> 
> Note that unlike many other signal related calls we do not pass a sigmask
> size, as that would get us to 7 arguments, which aren't easily supported
> by the syscall infrastructure.  It seems a lot less painful to just add a
> new syscall variant in the unlikely case we're going to increase the
> sigset size.

Starting with this commit following code does not compile for me
anymore:

#include <signal.h>
#include <linux/aio_abi.h>

int main()
{
        return 0;
}

In file included from /usr/include/linux/signal.h:5,
                 from /usr/include/linux/aio_abi.h:32,
                 from include.c:2:
/usr/include/asm/signal.h:16:23: error: conflicting types for ‘sigset_t’
 typedef unsigned long sigset_t;
                       ^~~~~~~~
In file included from /usr/include/signal.h:35,
                 from include.c:1:
/usr/include/bits/types/sigset_t.h:7:20: note: previous declaration of ‘sigset_t’ was here
 typedef __sigset_t sigset_t;
                    ^~~~~~~~
In file included from /usr/include/linux/signal.h:5,
                 from /usr/include/linux/aio_abi.h:32,
                 from include.c:2:
/usr/include/asm/signal.h:115:8: error: redefinition of ‘struct sigaction’
 struct sigaction {
        ^~~~~~~~~
In file included from /usr/include/signal.h:226,
                 from include.c:1:
/usr/include/bits/sigaction.h:27:8: note: originally defined here
 struct sigaction
        ^~~~~~~~~
[and much more]

Before this commit it compiles without errors.

		Adrian

  parent reply	other threads:[~2018-07-04 14:30 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02 21:14 io_pgetevents & aio fsync V4 Christoph Hellwig
2018-05-02 21:14 ` [PATCH 1/7] aio: don't print the page size at boot time Christoph Hellwig
2018-05-02 21:14 ` [PATCH 2/7] aio: remove an outdated BUG_ON and comment in aio_complete Christoph Hellwig
2018-05-02 21:14 ` [PATCH 3/7] aio: sanitize ki_list handling Christoph Hellwig
2018-05-02 21:14 ` [PATCH 4/7] aio: remove the extra get_file/fput pair in io_submit_one Christoph Hellwig
2018-05-02 22:04   ` Darrick J. Wong
2018-05-02 21:14 ` [PATCH 5/7] aio: refactor read/write iocb setup Christoph Hellwig
2018-05-02 21:14 ` [PATCH 6/7] aio: implement IOCB_CMD_FSYNC and IOCB_CMD_FDSYNC Christoph Hellwig
2018-05-02 21:14 ` [PATCH 7/7] aio: implement io_pgetevents Christoph Hellwig
2018-05-18  8:28   ` James Hogan
2018-05-18  8:57     ` Christoph Hellwig
2018-07-04 14:21   ` Adrian Reber [this message]
2018-07-08 20:44     ` Christoph Hellwig
2018-07-09 17:20       ` Stephan Müller
2018-07-09 19:21       ` Stephan Müller
2018-07-10 12:51         ` Christoph Hellwig
2018-07-10  5:11       ` Andrei Vagin
2018-05-10 18:05 ` io_pgetevents & aio fsync V4 Al Viro
  -- strict thread matches above, loose matches on Subject: below --
2018-04-15 15:01 io_pgetevents & aio fsync V3 Christoph Hellwig
2018-04-15 15:01 ` [PATCH 7/7] aio: implement io_pgetevents Christoph Hellwig

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