From 3ed75eb8f1cd89565966599c4f77d2edb086d5b0 Mon Sep 17 00:00:00 2001 From: Coly Li Date: Thu, 18 Oct 2007 23:39:15 -0700 Subject: setup vma->vm_page_prot by vm_get_page_prot() 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 Cc: Hugh Dickins Cc: Tony Luck Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/mmap.c | 11 ++++------- mm/mprotect.c | 6 ++---- 2 files changed, 6 insertions(+), 11 deletions(-) (limited to 'mm') diff --git a/mm/mmap.c b/mm/mmap.c index 4275e81..7a30c49 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -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; diff --git a/mm/mprotect.c b/mm/mprotect.c index 1d4d697..5522784 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -192,11 +192,9 @@ success: * 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; } -- cgit v1.1