Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[mirror_ubuntu-zesty-kernel.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index c6565f00fb38bdc89e0c0ae061786af4bc9c1667..54f3a9b0095600749fda793d7e6067bd2c7f997d 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -235,6 +235,9 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long
 
 static void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)
 {
+       if (!tlb->end)
+               return;
+
        tlb_flush(tlb);
        mmu_notifier_invalidate_range(tlb->mm, tlb->start, tlb->end);
 #ifdef CONFIG_HAVE_RCU_TABLE_FREE
@@ -247,7 +250,7 @@ static void tlb_flush_mmu_free(struct mmu_gather *tlb)
 {
        struct mmu_gather_batch *batch;
 
-       for (batch = &tlb->local; batch; batch = batch->next) {
+       for (batch = &tlb->local; batch && batch->nr; batch = batch->next) {
                free_pages_and_swap_cache(batch->pages, batch->nr);
                batch->nr = 0;
        }
@@ -256,9 +259,6 @@ static void tlb_flush_mmu_free(struct mmu_gather *tlb)
 
 void tlb_flush_mmu(struct mmu_gather *tlb)
 {
-       if (!tlb->end)
-               return;
-
        tlb_flush_mmu_tlbonly(tlb);
        tlb_flush_mmu_free(tlb);
 }