drm/i915: Check for dev->primary->master before dereference.

[safe/jmp/linux-2.6] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index d0f6e7c..258197b 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -151,10 +151,11 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
        /*
         * If we make a private mapping writable we increase our commit;
         * but (without finer accounting) cannot reduce our commit if we
-        * make it unwritable again.
+        * make it unwritable again. hugetlb mapping were accounted for
+        * even if read-only so there is no need to account for them here
         */
        if (newflags & VM_WRITE) {
-               if (!(oldflags & (VM_ACCOUNT|VM_WRITE|
+               if (!(oldflags & (VM_ACCOUNT|VM_WRITE|VM_HUGETLB|
                                                VM_SHARED|VM_NORESERVE))) {
                        charged = nrpages;
                        if (security_vm_enough_memory(charged))
@@ -217,8 +218,8 @@ fail:
        return error;
 }
 
-asmlinkage long
-sys_mprotect(unsigned long start, size_t len, unsigned long prot)
+SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
+               unsigned long, prot)
 {
        unsigned long vm_flags, nstart, end, tmp, reqprot;
        struct vm_area_struct *vma, *prev;