Merge branch 'linus' into core/softlockup

1 files changed, 5 insertions, 4 deletions

diff --git a/mm/mprotect.c b/mm/mprotect.c
index d0f6e7ce09f1..258197b76fb4 100644
--- 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;