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setup vma->vm_page_prot by vm_get_page_prot()

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This patch uses vm_get_page_prot() to setup vma->vm_page_prot.

Though inside vm_get_page_prot() the protection flags is AND with
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED), it does not hurt correct code.

Signed-off-by: Coly Li <coyli@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Coly Li 2007-10-18 23:39:15 -07:00 committed by Linus Torvalds
parent 1c7037db50
commit 3ed75eb8f1
4 changed files with 8 additions and 13 deletions
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2
arch/ia64/mm/init.c
View File

@ -127,8 +127,8 @@ ia64_init_addr_space (void)
vma->vm_mm = current->mm;
vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
vma->vm_end = vma->vm_start + PAGE_SIZE;
vma->vm_page_prot = protection_map[VM_DATA_DEFAULT_FLAGS & 0x7];
vma->vm_flags = VM_DATA_DEFAULT_FLAGS|VM_GROWSUP|VM_ACCOUNT;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
down_write(&current->mm->mmap_sem);
if (insert_vm_struct(current->mm, vma)) {
up_write(&current->mm->mmap_sem);

2
fs/exec.c
View File

@ -234,7 +234,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
vma->vm_start = vma->vm_end - PAGE_SIZE;
vma->vm_flags = VM_STACK_FLAGS;
vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
err = insert_vm_struct(mm, vma);
if (err) {
up_write(&mm->mmap_sem);

11
mm/mmap.c
View File

@ -1048,8 +1048,7 @@ int vma_wants_writenotify(struct vm_area_struct *vma)
/* The open routine did something to the protections already? */
if (pgprot_val(vma->vm_page_prot) !=
pgprot_val(protection_map[vm_flags &
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]))
pgprot_val(vm_get_page_prot(vm_flags)))
return 0;
/* Specialty mapping? */
@ -1130,8 +1129,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
vma->vm_start = addr;
vma->vm_end = addr + len;
vma->vm_flags = vm_flags;
vma->vm_page_prot = protection_map[vm_flags &
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
vma->vm_page_prot = vm_get_page_prot(vm_flags);
vma->vm_pgoff = pgoff;
if (file) {
@ -2002,8 +2000,7 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
vma->vm_end = addr + len;
vma->vm_pgoff = pgoff;
vma->vm_flags = flags;
vma->vm_page_prot = protection_map[flags &
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
vma->vm_page_prot = vm_get_page_prot(flags);
vma_link(mm, vma, prev, rb_link, rb_parent);
out:
mm->total_vm += len >> PAGE_SHIFT;
@ -2209,7 +2206,7 @@ int install_special_mapping(struct mm_struct *mm,
vma->vm_end = addr + len;
vma->vm_flags = vm_flags | mm->def_flags;
vma->vm_page_prot = protection_map[vma->vm_flags & 7];
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
vma->vm_ops = &special_mapping_vmops;
vma->vm_private_data = pages;

6
mm/mprotect.c
View File

@ -192,11 +192,9 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
* held in write mode.
*/
vma->vm_flags = newflags;
vma->vm_page_prot = protection_map[newflags &
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
vma->vm_page_prot = vm_get_page_prot(newflags);
if (vma_wants_writenotify(vma)) {
vma->vm_page_prot = protection_map[newflags &
(VM_READ|VM_WRITE|VM_EXEC)];
vma->vm_page_prot = vm_get_page_prot(newflags);
dirty_accountable = 1;
}