[PATCH] arch: s390: use struct_size() in kmalloc()

[xiaolinkui]

Use the new struct_size() helper to keep code simple.

Signed-off-by: xiaolinkui <xiaolin...@kylinos.cn>
---
 arch/s390/include/asm/idals.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/idals.h b/arch/s390/include/asm/idals.h
index 15578fd..6fb7ace 100644
--- a/arch/s390/include/asm/idals.h
+++ b/arch/s390/include/asm/idals.h
@@ -122,8 +122,7 @@ idal_buffer_alloc(size_t size, int page_order)
 
        nr_ptrs = (size + IDA_BLOCK_SIZE - 1) >> IDA_SIZE_LOG;
        nr_chunks = (4096 << page_order) >> IDA_SIZE_LOG;
-       ib = kmalloc(sizeof(struct idal_buffer) + nr_ptrs*sizeof(void *),
-                    GFP_DMA | GFP_KERNEL);
+       ib = kmalloc(struct_size(ib, data, nr_ptrs), GFP_DMA | GFP_KERNEL);
        if (ib == NULL)
                return ERR_PTR(-ENOMEM);
        ib->size = size;
-- 
2.7.4