Merge branch 'akpm' (patches from Andrew)

Merge first patch-bomb from Andrew Morton:

 - A few hotfixes which missed 4.4 becasue I was asleep.  cc'ed to
   -stable

 - A few misc fixes

 - OCFS2 updates

 - Part of MM.  Including pretty large changes to page-flags handling
   and to thp management which have been buffered up for 2-3 cycles now.

  I have a lot of MM material this time.

[ It turns out the THP part wasn't quite ready, so that got dropped from
  this series  - Linus ]

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
  zsmalloc: reorganize struct size_class to pack 4 bytes hole
  mm/zbud.c: use list_last_entry() instead of list_tail_entry()
  zram/zcomp: do not zero out zcomp private pages
  zram: pass gfp from zcomp frontend to backend
  zram: try vmalloc() after kmalloc()
  zram/zcomp: use GFP_NOIO to allocate streams
  mm: add tracepoint for scanning pages
  drivers/base/memory.c: fix kernel warning during memory hotplug on ppc64
  mm/page_isolation: use macro to judge the alignment
  mm: fix noisy sparse warning in LIBCFS_ALLOC_PRE()
  mm: rework virtual memory accounting
  include/linux/memblock.h: fix ordering of 'flags' argument in comments
  mm: move lru_to_page to mm_inline.h
  Documentation/filesystems: describe the shared memory usage/accounting
  memory-hotplug: don't BUG() in register_memory_resource()
  hugetlb: make mm and fs code explicitly non-modular
  mm/swapfile.c: use list_for_each_entry_safe in free_swap_count_continuations
  mm: /proc/pid/clear_refs: no need to clear VM_SOFTDIRTY in clear_soft_dirty_pmd()
  mm: make sure isolate_lru_page() is never called for tail page
  vmstat: make vmstat_updater deferrable again and shut down on idle
  ...

1 files changed, 11 insertions, 3 deletions

diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c
index e78a203d44c8..1e09592148ad 100644
--- a/fs/ocfs2/slot_map.c
+++ b/fs/ocfs2/slot_map.c
@@ -322,8 +322,7 @@ static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si)
 	if (si == NULL)
 		return;
 
-	if (si->si_inode)
-		iput(si->si_inode);
+	iput(si->si_inode);
 	if (si->si_bh) {
 		for (i = 0; i < si->si_blocks; i++) {
 			if (si->si_bh[i]) {
@@ -503,8 +502,17 @@ int ocfs2_find_slot(struct ocfs2_super *osb)
 	trace_ocfs2_find_slot(osb->slot_num);
 
 	status = ocfs2_update_disk_slot(osb, si, osb->slot_num);
-	if (status < 0)
+	if (status < 0) {
 		mlog_errno(status);
+		/*
+		 * if write block failed, invalidate slot to avoid overwrite
+		 * slot during dismount in case another node rightly has mounted
+		 */
+		spin_lock(&osb->osb_lock);
+		ocfs2_invalidate_slot(si, osb->slot_num);
+		osb->slot_num = OCFS2_INVALID_SLOT;
+		spin_unlock(&osb->osb_lock);
+	}
 
 bail:
 	return status;