HWPOISON: Turn ref argument into flags argument

Now that "ref" is just a boolean turn it into
a flags argument. First step is only a single flag
that makes the code's intention more clear, but more
may follow.

Signed-off-by: Andi Kleen <ak@linux.intel.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 4253e14fa709..3338c443272c 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -737,7 +737,7 @@ static void hwpoison_user_mappings(struct page *p, unsigned long pfn,
                       ret != SWAP_SUCCESS, pfn);
 }
 
-int __memory_failure(unsigned long pfn, int trapno, int ref)
+int __memory_failure(unsigned long pfn, int trapno, int flags)
 {
         unsigned long lru_flag;
         struct page_state *ps;
@@ -773,7 +773,8 @@ int __memory_failure(unsigned long pfn, int trapno, int ref)
          * In fact it's dangerous to directly bump up page count from 0,
          * that may make page_freeze_refs()/page_unfreeze_refs() mismatch.
          */
-        if (!ref && !get_page_unless_zero(compound_head(p))) {
+        if (!(flags & MF_COUNT_INCREASED) &&
+                !get_page_unless_zero(compound_head(p))) {
                 action_result(pfn, "free or high order kernel", IGNORED);
                 return PageBuddy(compound_head(p)) ? 0 : -EBUSY;
         }