aio: fix wrong subsystem comments

 - sys_io_destroy(): acutually return -EINVAL if the context pointed to
   is invalidIndex: linux-2.6.33-rc4/fs/aio.c
 - sys_io_getevents(): An argument specifying timeout is not `when',
   but `timeout'.
 - sys_io_getevents(): Should describe what is returned if this syscall
   succeeds.

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/aio.c b/fs/aio.c
index 1ccf25c..3006b5b 100644 (file)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1277,7 +1277,7 @@ out:
 /* sys_io_destroy:
  *     Destroy the aio_context specified.  May cancel any outstanding 
  *     AIOs and block on completion.  Will fail with -ENOSYS if not
- *     implemented.  May fail with -EFAULT if the context pointed to
+ *     implemented.  May fail with -EINVAL if the context pointed to
  *     is invalid.
  */
 SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
@@ -1795,15 +1795,16 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
 
 /* io_getevents:
  *     Attempts to read at least min_nr events and up to nr events from
- *     the completion queue for the aio_context specified by ctx_id.  May
- *     fail with -EINVAL if ctx_id is invalid, if min_nr is out of range,
- *     if nr is out of range, if when is out of range.  May fail with
- *     -EFAULT if any of the memory specified to is invalid.  May return
- *     0 or < min_nr if no events are available and the timeout specified
- *     by when has elapsed, where when == NULL specifies an infinite
- *     timeout.  Note that the timeout pointed to by when is relative and
- *     will be updated if not NULL and the operation blocks.  Will fail
- *     with -ENOSYS if not implemented.
+ *     the completion queue for the aio_context specified by ctx_id. If
+ *     it succeeds, the number of read events is returned. May fail with
+ *     -EINVAL if ctx_id is invalid, if min_nr is out of range, if nr is
+ *     out of range, if timeout is out of range.  May fail with -EFAULT
+ *     if any of the memory specified is invalid.  May return 0 or
+ *     < min_nr if the timeout specified by timeout has elapsed
+ *     before sufficient events are available, where timeout == NULL
+ *     specifies an infinite timeout. Note that the timeout pointed to by
+ *     timeout is relative and will be updated if not NULL and the
+ *     operation blocks. Will fail with -ENOSYS if not implemented.
  */
 SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
                long, min_nr,