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| author | bz <bz@FreeBSD.org> | 2009-10-02 17:51:46 +0000 |
|---|---|---|
| committer | bz <bz@FreeBSD.org> | 2009-10-02 17:51:46 +0000 |
| commit | 3b88ee818730fa4e010b7e0e18f6394ab1b374bf (patch) | |
| tree | 6db925f74bcd6cb942c7a8438c8cc05ec51c236e /sys/vm | |
| parent | bc660fe08f5a3fcc675457693dce1aa6f0f38e30 (diff) | |
| download | FreeBSD-src-3b88ee818730fa4e010b7e0e18f6394ab1b374bf.zip FreeBSD-src-3b88ee818730fa4e010b7e0e18f6394ab1b374bf.tar.gz | |
Back out the functional parts from r197537. After r197711, affecting all
user mappings, mmap no longer needs special treatment.
Diffstat (limited to 'sys/vm')
| -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)) |
