linux-toradex.git/include/linux/aio.h, branch v2.6.38.5

aio: fix the compat vectored operations

2010-05-27T16:12:53+00:00

The aio compat code was not converting the struct iovecs from 32bit to
64bit pointers, causing either EINVAL to be returned from io_getevents, or
EFAULT as the result of the I/O.  This patch passes a compat flag to
io_submit to signal that pointer conversion is necessary for a given iocb
array.

A variant of this was tested by Michael Tokarev.  I have also updated the
libaio test harness to exercise this code path with good success.
Further, I grabbed a copy of ltp and ran the
testcases/kernel/syscall/readv and writev tests there (compiled with -m32
on my 64bit system).  All seems happy, but extra eyes on this would be
welcome.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix CONFIG_COMPAT=n build]
Signed-off-by: Jeff Moyer 
Reported-by: Michael Tokarev 
Cc: Zach Brown 
Cc: 		[2.6.35.1]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

aio: remove unused field

2009-12-16T15:20:13+00:00

Don't know the reason, but it appears ki_wait field of iocb never gets used.

Signed-off-by: Shaohua Li 
Cc: Jeff Moyer 
Cc: Benjamin LaHaise 
Cc: Zach Brown 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

includecheck fix: include/linux, aio.h

2009-09-20T10:39:20+00:00

fix the following 'make includecheck' warning:

  include/linux/aio.h: linux/aio_abi.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput 
Cc: bcrl@kvack.org
Cc: Sam Ravnborg 
LKML-Reference: <1247068254.4382.101.camel@ht.satnam>

eventfd: revised interface and cleanups

2009-07-01T01:55:58+00:00

Change the eventfd interface to de-couple the eventfd memory context, from
the file pointer instance.

Without such change, there is no clean way to racely free handle the
POLLHUP event sent when the last instance of the file* goes away.  Also,
now the internal eventfd APIs are using the eventfd context instead of the
file*.

This patch is required by KVM's IRQfd code, which is still under
development.

Signed-off-by: Davide Libenzi 
Cc: Gregory Haskins 
Cc: Rusty Russell 
Cc: Benjamin LaHaise 
Cc: Avi Kivity 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

aio: make the lookup_ioctx() lockless

2008-12-29T07:29:50+00:00

The mm->ioctx_list is currently protected by a reader-writer lock,
so we always grab that lock on the read side for doing ioctx
lookups. As the workload is extremely reader biased, turn this into
an rcu hlist so we can make lookup_ioctx() lockless. Get rid of
the rwlock and use a spinlock for providing update side exclusion.

There's usually only 1 entry on this list, so it doesn't make sense
to look into fancier data structures.

Reviewed-by: Jeff Moyer 
Signed-off-by: Jens Axboe

Configure out AIO support

2008-10-16T18:21:51+00:00

This patchs adds the CONFIG_AIO option which allows to remove support
for asynchronous I/O operations, that are not necessarly used by
applications, particularly on embedded devices. As this is a
size-reduction option, it depends on CONFIG_EMBEDDED. It allows to
save ~7 kilobytes of kernel code/data:

   text	   data	    bss	    dec	    hex	filename
1115067	 119180	 217088	1451335	 162547	vmlinux
1108025	 119048	 217088	1444161	 160941	vmlinux.new
  -7042    -132       0   -7174   -1C06 +/-

This patch has been originally written by Matt Mackall
, and is part of the Linux Tiny project.

[randy.dunlap@oracle.com: build fix]
Signed-off-by: Thomas Petazzoni 
Cc: Benjamin LaHaise 
Cc: Zach Brown 
Signed-off-by: Matt Mackall 
Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

include/linux/aio.h: removed duplicated include

2008-07-26T19:00:04+00:00

Removed duplicated include  in include/linux/aio.h

Signed-off-by: Huang Weiyi 
Signed-off-by: Benjamin LaHaise 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/aio.c: make 3 functions static

2008-04-29T15:06:00+00:00

Make the following needlessly global functions static:

- __put_ioctx()
- lookup_ioctx()
- io_submit_one()

Signed-off-by: Adrian Bunk 
Cc: Zach Brown 
Cc: Benjamin LaHaise 
Cc: Badari Pulavarty 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/block_dev.c: remove #if 0'ed code

2008-02-19T09:04:00+00:00

Commit b2e895dbd80c420bfc0937c3729b4afe073b3848 #if 0'ed this code stating:

<--  snip  -->

    [PATCH] revert blockdev direct io back to 2.6.19 version

    Andrew Vasquez is reporting as-iosched oopses and a 65% throughput
    slowdown due to the recent special-casing of direct-io against
    blockdevs.  We don't know why either of these things are occurring.

    The patch minimally reverts us back to the 2.6.19 code for a 2.6.20
    release.

<--  snip  -->

It has since been dead code, and unless someone wants to revive it now
it's time to remove it.

This patch also makes bio_release_pages() static again and removes the
ki_bio_count member from struct kiocb, reverting changes that had been
done for this dead code.

Signed-off-by: Adrian Bunk 
Signed-off-by: Jens Axboe

include/linux: Remove all users of FASTCALL() macro

2008-02-14T00:21:18+00:00

FASTCALL() is always expanded to empty, remove it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Harvey Harrison 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds