[PATCH] man2/prctl.2: Add PR_GET_TID_ADDRESS description

[Cyrill Gorcunov]

Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
---
 man2/prctl.2 | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/man2/prctl.2 b/man2/prctl.2
index 012af4d..4906c70 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -761,6 +761,18 @@ option.
 .\" symbolic-link transitions over all process running in a system.
 .\" ========== END FIXME
 .RE
+.TP
+.BR PR_GET_TID_ADDRESS " (since Linux 3.5)"
+Return
+.I clear_child_tid
+in the location pointed by
+.IR "(int\ **) arg2" .
+See
+.BR set_tid_address (2)
+for more details.
+This feature is available only if the kernel is built with the
+.BR CONFIG_CHECKPOINT_RESTORE
+option enabled.
 .\"
 .SH "RETURN VALUE"
 On success,
-- 
1.8.1.2

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