mm/memblock.c:memblock_add_range(): if nr_new is 0 just return

If nr_new is 0 which means there's no region would be added, so just
return to the caller.

Signed-off-by: nimisolo <nimisolo@gmail.com>
Cc: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memblock.c b/mm/memblock.c
index ac1248933b3172d6d46ddf3ccf0745db2371adce..ca099159b45a82c2f1fcfbad28fc14221953a8ee 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -584,6 +584,9 @@ repeat:
                                               nid, flags);
        }
 
+       if (!nr_new)
+               return 0;
+
        /*
         * If this was the first round, resize array and repeat for actual
         * insertions; otherwise, merge and return.