svn commit: r359865 - head/lib/libc/sys
Kyle Evans
kevans at FreeBSD.org
Mon Apr 13 15:59:15 UTC 2020
Author: kevans
Date: Mon Apr 13 15:59:15 2020
New Revision: 359865
URL: https://svnweb.freebsd.org/changeset/base/359865
Log:
libc: remove shm_open(2)'s compat fallback
This had been introduced to ease any pain for using slightly older kernels
with a newer libc, e.g., for bisecting a kernel across the introduction of
shm_open2(2). 6 months has passed, retire the fallback and let shm_open()
unconditionally call shm_open2().
Stale includes are removed as well.
Modified:
head/lib/libc/sys/shm_open.c
Modified: head/lib/libc/sys/shm_open.c
==============================================================================
--- head/lib/libc/sys/shm_open.c Mon Apr 13 14:44:44 2020 (r359864)
+++ head/lib/libc/sys/shm_open.c Mon Apr 13 15:59:15 2020 (r359865)
@@ -33,12 +33,10 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/mman.h>
-#include <sys/syscall.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
-#include <unistd.h>
#include <stdio.h>
#include <string.h>
@@ -47,25 +45,13 @@ __FBSDID("$FreeBSD$");
__weak_reference(shm_open, _shm_open);
__weak_reference(shm_open, __sys_shm_open);
-#define SHM_OPEN2_OSREL 1300048
-
#define MEMFD_NAME_PREFIX "memfd:"
int
shm_open(const char *path, int flags, mode_t mode)
{
- if (__getosreldate() >= SHM_OPEN2_OSREL)
- return (__sys_shm_open2(path, flags | O_CLOEXEC, mode, 0,
- NULL));
-
- /*
- * Fallback to shm_open(2) on older kernels. The kernel will enforce
- * O_CLOEXEC in this interface, unlike the newer shm_open2 which does
- * not enforce it. The newer interface allows memfd_create(), for
- * instance, to not have CLOEXEC on the returned fd.
- */
- return (syscall(SYS_freebsd12_shm_open, path, flags, mode));
+ return (__sys_shm_open2(path, flags | O_CLOEXEC, mode, 0, NULL));
}
/*
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