_exit.2: Add "C library/kernel ABI differences" for paragraph on exit_group()

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man2/_exit.2 b/man2/_exit.2
index 57489f604cbf857791419c8fa07fc1e906732675..59bef2a58f0b02ea7ca7553ae8aa6ae1a16c84b0 100644 (file)
--- a/man2/_exit.2
+++ b/man2/_exit.2
@@ -114,7 +114,7 @@ Whether any pending I/O is canceled, and which pending I/O may be
 canceled upon
 .BR _exit (),
 is implementation-dependent.
-
+.SS C library/kernel ABI differences
 In glibc up to version 2.3, the
 .BR _exit ()
 wrapper function invoked the kernel system call of the same name.