1 files changed, 4 insertions, 27 deletions

diff --git a/src/lib/libc/stdlib/malloc.3 b/src/lib/libc/stdlib/malloc.3
index c1776f61cb..c0472ee2b9 100644
--- a/src/lib/libc/stdlib/malloc.3
+++ b/src/lib/libc/stdlib/malloc.3
@@ -30,9 +30,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"     $OpenBSD: malloc.3,v 1.119 2018/11/18 16:15:18 otto Exp $
+.\"     $OpenBSD: malloc.3,v 1.120 2018/11/21 06:57:04 otto Exp $
 .\"
-.Dd $Mdocdate: November 18 2018 $
+.Dd $Mdocdate: November 21 2018 $
 .Dt MALLOC 3
 .Os
 .Sh NAME
@@ -43,8 +43,7 @@
 .Nm reallocarray ,
 .Nm recallocarray ,
 .Nm freezero ,
-.Nm aligned_alloc ,
-.Nm malloc_usable_size
+.Nm aligned_alloc
 .Nd memory allocation and deallocation
 .Sh SYNOPSIS
 .In stdlib.h
@@ -65,7 +64,6 @@
 .Ft void *
 .Fn aligned_alloc "size_t alignment" "size_t size"
 .Ft size_t
-.Fn malloc_usable_size "void *ptr"
 .Vt char *malloc_options ;
 .Sh DESCRIPTION
 The standard functions
@@ -236,25 +234,6 @@ If
 is not a multiple of
 .Fa alignment ,
 behavior is undefined.
-.Pp
-The
-.Fn malloc_usable_size
-function returns the actual size of the allocated memory pointed to by
-.Va ptr .
-If
-.Va ptr
-is
-.Dv NULL ,
-it returns 0.
-If
-.Va ptr
-was never returned by an allocation function or freed before,
-the behavior is undefined.
-This function should not be relied upon since it exposes some of the internal
-workings of the
-.Fn malloc
-family of functions.
-Writing beyond the requested size introduces undefined behavior.
 .Sh RETURN VALUES
 Upon successful completion, the allocation functions
 return a pointer to the allocated space; otherwise,
@@ -640,9 +619,7 @@ function appeared in
 .Ox 6.2 .
 The
 .Fn aligned_alloc
-and
-.Fn malloc_usable_size
-functions appeared in
+function appeared in
 .Ox 6.5 .
 .Sh CAVEATS
 When using