diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-05-02 19:51:00 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-02 19:57:24 +0200 |
| commit | 7a074e96dee62586c935c80cecd931431bfdd0be (patch) | |
| tree | a1a29dad896070e82827d7447cfcc9a064e5a63d /kernel/sys_ni.c | |
| parent | a3c0d439e4d92411c2b4b21a526a4de720d0806b (diff) | |
| download | linux-7a074e96dee62586c935c80cecd931431bfdd0be.tar.gz linux-7a074e96dee62586c935c80cecd931431bfdd0be.tar.bz2 linux-7a074e96dee62586c935c80cecd931431bfdd0be.zip | |
aio: implement io_pgetevents
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.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'kernel/sys_ni.c')
| -rw-r--r-- | kernel/sys_ni.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index 9791364925dc..183169c2a75b 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -43,7 +43,9 @@ COND_SYSCALL(io_submit); COND_SYSCALL_COMPAT(io_submit); COND_SYSCALL(io_cancel); COND_SYSCALL(io_getevents); +COND_SYSCALL(io_pgetevents); COND_SYSCALL_COMPAT(io_getevents); +COND_SYSCALL_COMPAT(io_pgetevents); /* fs/xattr.c */ |