add io_getevents() BUGS

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Hi!
The io_getevents() may cause segfault when called with invalid ctx_id.

For reference see: http://marc.info/?l=linux-aio&m=130089887002435&w=2

The attached patch adds BUGS paragraph into corresponding manpage.

-- 
Cyril Hrubis
chrubis@xxxxxxx
>From f8b30bf9d4a7ac1f821462906f43ca84624915cf Mon Sep 17 00:00:00 2001
From: Cyril Hrubis <chrubis@xxxxxxx>
Date: Wed, 23 Mar 2011 20:06:22 +0100
Subject: [PATCH] Added note about segfault into io_getevents manual.

Signed-off-by: Cyril Hrubis <chrubis@xxxxxxx>
---
 man2/io_getevents.2 |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/man2/io_getevents.2 b/man2/io_getevents.2
index a337404..e08fd01 100644
--- a/man2/io_getevents.2
+++ b/man2/io_getevents.2
@@ -98,6 +98,9 @@ then the return value follows the usual conventions for
 indicating an error: \-1, with
 .I errno
 set to a (positive) value that indicates the error.
+.SH "BUGS"
+This call may cause segmentation fault instead of returning
+\fBEINVAL\fP for invalid \fIctx_id\fP.
 .SH "SEE ALSO"
 .PP
 .BR io_cancel (2),
-- 
1.6.4.2


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