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| author | Arnd Bergmann <arnd@arndb.de> | 2018-03-09 23:11:26 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2018-03-16 10:56:10 +0100 |
| commit | 1a8429132e1d2ada3832db5b4a0802c49affb750 (patch) | |
| tree | 4653a5067340d1701596e1756651d59eca7b07b9 /mm/nommu.c | |
| parent | procfs: remove CONFIG_HARDWALL dependency (diff) | |
| download | linux-1a8429132e1d2ada3832db5b4a0802c49affb750.tar.xz linux-1a8429132e1d2ada3832db5b4a0802c49affb750.zip | |
mm: remove blackfin MPU support
The CONFIG_MPU option was only defined on blackfin, and that architecture
is now being removed, so the respective code can be simplified.
A lot of other microcontrollers have an MPU, but I suspect that if we
want to bring that support back, we'd do it differently anyway.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index ebb6e618dade..838a8fdec5c2 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -663,22 +663,6 @@ static void put_nommu_region(struct vm_region *region) } /* - * update protection on a vma - */ -static void protect_vma(struct vm_area_struct *vma, unsigned long flags) -{ -#ifdef CONFIG_MPU - struct mm_struct *mm = vma->vm_mm; - long start = vma->vm_start & PAGE_MASK; - while (start < vma->vm_end) { - protect_page(mm, start, flags); - start += PAGE_SIZE; - } - update_protections(mm); -#endif -} - -/* * add a VMA into a process's mm_struct in the appropriate place in the list * and tree and add to the address space's page tree also if not an anonymous * page @@ -695,8 +679,6 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma) mm->map_count++; vma->vm_mm = mm; - protect_vma(vma, vma->vm_flags); - /* add the VMA to the mapping */ if (vma->vm_file) { mapping = vma->vm_file->f_mapping; @@ -757,8 +739,6 @@ static void delete_vma_from_mm(struct vm_area_struct *vma) struct mm_struct *mm = vma->vm_mm; struct task_struct *curr = current; - protect_vma(vma, 0); - mm->map_count--; for (i = 0; i < VMACACHE_SIZE; i++) { /* if the vma is cached, invalidate the entire cache */ |