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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 <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Tony Luck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Coly Li 2007-10-18 23:39:15 -07:00 • committed by Linus Torvalds
commit 3ed75eb8f1
4 changed files with 8 additions and 13 deletions
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11
mm/mmap.c
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@ -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 @@ munmap_back:
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;