diff options
| -rw-r--r-- | mm/mprotect.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 3dca970367db..94722a4d6b43 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -114,7 +114,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, #ifdef CONFIG_NUMA_BALANCING static inline void change_pmd_protnuma(struct mm_struct *mm, unsigned long addr, - pmd_t *pmd) + pmd_t *pmd) { spin_lock(&mm->page_table_lock); set_pmd_at(mm, addr & PMD_MASK, pmd, pmd_mknuma(*pmd)); @@ -122,15 +122,15 @@ static inline void change_pmd_protnuma(struct mm_struct *mm, unsigned long addr, } #else static inline void change_pmd_protnuma(struct mm_struct *mm, unsigned long addr, - pmd_t *pmd) + pmd_t *pmd) { BUG(); } #endif /* CONFIG_NUMA_BALANCING */ -static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pud_t *pud, - unsigned long addr, unsigned long end, pgprot_t newprot, - int dirty_accountable, int prot_numa) +static inline unsigned long change_pmd_range(struct vm_area_struct *vma, + pud_t *pud, unsigned long addr, unsigned long end, + pgprot_t newprot, int dirty_accountable, int prot_numa) { pmd_t *pmd; unsigned long next; @@ -143,7 +143,8 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pud_t * if (pmd_trans_huge(*pmd)) { if (next - addr != HPAGE_PMD_SIZE) split_huge_page_pmd(vma, addr, pmd); - else if (change_huge_pmd(vma, pmd, addr, newprot, prot_numa)) { + else if (change_huge_pmd(vma, pmd, addr, newprot, + prot_numa)) { pages += HPAGE_PMD_NR; continue; } @@ -167,9 +168,9 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pud_t * return pages; } -static inline unsigned long change_pud_range(struct vm_area_struct *vma, pgd_t *pgd, - unsigned long addr, unsigned long end, pgprot_t newprot, - int dirty_accountable, int prot_numa) +static inline unsigned long change_pud_range(struct vm_area_struct *vma, + pgd_t *pgd, unsigned long addr, unsigned long end, + pgprot_t newprot, int dirty_accountable, int prot_numa) { pud_t *pud; unsigned long next; @@ -304,7 +305,8 @@ success: dirty_accountable = 1; } - change_protection(vma, start, end, vma->vm_page_prot, dirty_accountable, 0); + change_protection(vma, start, end, vma->vm_page_prot, + dirty_accountable, 0); vm_stat_account(mm, oldflags, vma->vm_file, -nrpages); vm_stat_account(mm, newflags, vma->vm_file, nrpages); @@ -361,8 +363,7 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len, error = -EINVAL; if (!(vma->vm_flags & VM_GROWSDOWN)) goto out; - } - else { + } else { if (vma->vm_start > start) goto out; if (unlikely(grows & PROT_GROWSUP)) { @@ -378,9 +379,10 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len, for (nstart = start ; ; ) { unsigned long newflags; - /* Here we know that vma->vm_start <= nstart < vma->vm_end. */ + /* Here we know that vma->vm_start <= nstart < vma->vm_end. */ - newflags = vm_flags | (vma->vm_flags & ~(VM_READ | VM_WRITE | VM_EXEC)); + newflags = vm_flags; + newflags |= (vma->vm_flags & ~(VM_READ | VM_WRITE | VM_EXEC)); /* newflags >> 4 shift VM_MAY% in place of VM_% */ if ((newflags & ~(newflags >> 4)) & (VM_READ | VM_WRITE | VM_EXEC)) { |