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s390/idal: use struct_size() in kmalloc() 

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

Signed-off-by: xiaolinkui <xiaolinkui@kylinos.cn>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
xiaolinkui 2019-05-17 15:15:17 +08:00 committed by Heiko Carstens
parent a646ef398e
commit 31885a8dad
1 changed files with 1 additions and 2 deletions
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arch/s390/include/asm/idals.h
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@ -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;