[PATCH] atan.3: ATTRIBUTES: Note functions that are thread-safe

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The functions atan(), atanf() and atanl() are thread safe.

Signed-off-by: Peng Haitao <penght@xxxxxxxxxxxxxx>
---
 man3/atan.3 | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/man3/atan.3 b/man3/atan.3
index 7eb8218..9f5a173 100644
--- a/man3/atan.3
+++ b/man3/atan.3
@@ -32,7 +32,7 @@
 .\" Modified 2002-07-27 by Walter Harms
 .\" 	(walter.harms@xxxxxxxxxxxxxxxxxxxxxxxxxxx)
 .\"
-.TH ATAN 3  2010-09-20 "" "Linux Programmer's Manual"
+.TH ATAN 3  2013-10-07 "" "Linux Programmer's Manual"
 .SH NAME
 atan, atanf, atanl \- arc tangent function
 .SH SYNOPSIS
@@ -93,6 +93,14 @@ is positive infinity (negative infinity), +pi/2 (\-pi/2) is returned.
 .\" glibc 2.8 does not do this.
 .SH ERRORS
 No errors occur.
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR atan (),
+.BR atanf (),
+and
+.BR atanl ()
+functions are thread-safe.
 .SH CONFORMING TO
 C99, POSIX.1-2001.
 The variant returning
-- 
1.8.3.1

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