diff options
Diffstat (limited to 'sys/vm/vm_mmap.c')
-rw-r--r-- | sys/vm/vm_mmap.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c index e8ba134..4963a60 100644 --- a/sys/vm/vm_mmap.c +++ b/sys/vm/vm_mmap.c @@ -97,14 +97,6 @@ SYSCTL_INT(_vm, OID_AUTO, max_proc_mmap, CTLFLAG_RW, &max_proc_mmap, 0, "Maximum number of memory-mapped files per process"); /* - * 'mmap_zero' determines whether or not MAP_FIXED mmap() requests for - * virtual address zero are permitted. - */ -static int mmap_zero; -SYSCTL_INT(_security_bsd, OID_AUTO, mmap_zero, CTLFLAG_RW, &mmap_zero, 0, - "Processes may map an object at virtual address zero"); - -/* * Set the maximum number of vm_map_entry structures per process. Roughly * speaking vm_map_entry structures are tiny, so allowing them to eat 1/100 * of our KVM malloc space still results in generous limits. We want a @@ -277,13 +269,6 @@ mmap(td, uap) if (addr & PAGE_MASK) return (EINVAL); - /* - * Mapping to address zero is only permitted if - * mmap_zero is enabled. - */ - if (addr == 0 && !mmap_zero) - return (EINVAL); - /* Address range must be all in user VM space. */ if (addr < vm_map_min(&vms->vm_map) || addr + size > vm_map_max(&vms->vm_map)) |