Merge Linus' tree to be be to apply submitted patches to newer code than

current trivial.git base

1 files changed, 12 insertions, 5 deletions

diff --git a/mm/mlock.c b/mm/mlock.c
index b1eb5363400..73cf0987088 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -210,12 +210,19 @@ out:
  * @vma:   target vma
  * @start: start address
  * @end:   end address
+ * @nonblocking:
  *
  * This takes care of making the pages present too.
  *
  * return 0 on success, negative error code on error.
  *
- * vma->vm_mm->mmap_sem must be held for at least read.
+ * vma->vm_mm->mmap_sem must be held.
+ *
+ * If @nonblocking is NULL, it may be held for read or write and will
+ * be unperturbed.
+ *
+ * If @nonblocking is non-NULL, it must held for read only and may be
+ * released.  If it's released, *@nonblocking will be set to 0.
  */
 long __mlock_vma_pages_range(struct vm_area_struct *vma,
 		unsigned long start, unsigned long end, int *nonblocking)
@@ -226,9 +233,9 @@ long __mlock_vma_pages_range(struct vm_area_struct *vma,
 
 	VM_BUG_ON(start & ~PAGE_MASK);
 	VM_BUG_ON(end   & ~PAGE_MASK);
-	VM_BUG_ON(start < vma->vm_start);
-	VM_BUG_ON(end   > vma->vm_end);
-	VM_BUG_ON(!rwsem_is_locked(&mm->mmap_sem));
+	VM_BUG_ON_VMA(start < vma->vm_start, vma);
+	VM_BUG_ON_VMA(end   > vma->vm_end, vma);
+	VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_sem), mm);
 
 	gup_flags = FOLL_TOUCH | FOLL_MLOCK;
 	/*
@@ -782,7 +789,7 @@ static int do_mlockall(int flags)
 
 		/* Ignore errors */
 		mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags);
-		cond_resched();
+		cond_resched_rcu_qs();
 	}
 out:
 	return 0;