percpu: fix first chunk size calculation for populated bitmap

commit b3b33d3c43bbe0177d70653f4e889c78cc37f097 upstream.

Variable populated, which is a member of struct pcpu_chunk, is used as a
unit of size of unsigned long.
However, size of populated is miscounted. So, I fix this minor part.

Fixes: 8ab16c43ea79 ("percpu: change the number of pages marked in the first_chunk pop bitmap")
Cc: <stable@vger.kernel.org> # 4.14+
Signed-off-by: Sunghyun Jin <mcsmonk@gmail.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/percpu.c b/mm/percpu.c
index 7e06a1e5872091d3d84b693121f9d82d06508766..806bc16f88eb82529615d529d3e8bfe657790972 100644 (file)
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1328,7 +1328,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
 
        /* allocate chunk */
        alloc_size = sizeof(struct pcpu_chunk) +
-               BITS_TO_LONGS(region_size >> PAGE_SHIFT);
+               BITS_TO_LONGS(region_size >> PAGE_SHIFT) * sizeof(unsigned long);
        chunk = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
        if (!chunk)
                panic("%s: Failed to allocate %zu bytes\n", __func__,