posix_fadvise.2: Add "C library/kernel ABI differences" subsection

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

diff --git a/man2/posix_fadvise.2 b/man2/posix_fadvise.2
index 6b7ca8a43cc4905af5de4ca3047cdcef74c90ced..65d1b8a98eaca08c3a36e8ee7a45792bc58001a8 100644 (file)
--- a/man2/posix_fadvise.2
+++ b/man2/posix_fadvise.2
@@ -169,6 +169,13 @@ call
 or
 .BR fdatasync (2)
 first.
+.SS C library/kernel ABI differences
+The name of the wrapper function in the C library is
+.BR posix_fadvise ().
+The underlying system call is called
+.BR fadvise64 ()
+(or, on some architectures,
+.BR fadvise64_64 ()).
 .SS Architecture-specific variants
 Some architectures require
 64-bit arguments to be aligned in a suitable pair of registers (see