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 <[email protected]>
Cc: Alexander Kuleshov <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Tang Chen <[email protected]>
Cc: Wei Yang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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.