[PATCH] clock_getres.2: ATTRIBUTES: Note functions that are thread-safe

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After research, We think clock_getres(), clock_gettime() and
clock_settime() are thread-safe. But, there are not markings of
clock_getres(), clock_gettime() and clock_settime() in glibc document.

Signed-off-by: Zeng Linggang <zenglg.jy@xxxxxxxxxxxxxx>
---
 man2/clock_getres.2 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/man2/clock_getres.2 b/man2/clock_getres.2
index 6809c7b..c7ecd3d 100644
--- a/man2/clock_getres.2
+++ b/man2/clock_getres.2
@@ -204,6 +204,21 @@ specified is not supported on this system.
 does not have permission to set the clock indicated.
 .SH VERSIONS
 These system calls first appeared in Linux 2.6.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw16 lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.BR clock_getres (),
+.BR clock_gettime (),
+.BR clock_settime ()
+T}	Thread safety	MT-Safe
+.TE
+
 .SH CONFORMING TO
 SUSv2, POSIX.1-2001.
 .SH AVAILABILITY
-- 
1.9.3

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