d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Back out the functional parts from r197537. After r197711, affecting all

Browse Source 
user mappings, mmap no longer needs special treatment.
This commit is contained in:
Bjoern A. Zeeb 2009-10-02 17:51:46 +00:00
parent 878adb8517
commit fc50832731
1 changed files with 0 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/vm/vm_mmap.c
View File

@ -96,14 +96,6 @@ static int max_proc_mmap;
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
@ -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))