mm/memblock.c: reversed logic in memblock_discard()

In recently introduced memblock_discard() there is a reversed logic bug.
Memory is freed of static array instead of dynamically allocated one.

Link: http://lkml.kernel.org/r/1503511441-95478-2-git-send-email-pasha.tatashin@oracle.com
Fixes: 3010f876500f ("mm: discard memblock data later")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reported-by: Woody Suwalski <terraluna977@gmail.com>
Tested-by: Woody Suwalski <terraluna977@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/memblock.c b/mm/memblock.c
index bf14aea6ab70..91205780e6b1 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -299,7 +299,7 @@ void __init memblock_discard(void)
                 __memblock_free_late(addr, size);
         }
 
-        if (memblock.memory.regions == memblock_memory_init_regions) {
+        if (memblock.memory.regions != memblock_memory_init_regions) {
                 addr = __pa(memblock.memory.regions);
                 size = PAGE_ALIGN(sizeof(struct memblock_region) *
                                   memblock.memory.max);