Commit 2285ec87 authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva Committed by David S. Miller

mlxsw: spectrum_acl_bloom_filter: use struct_size() in kzalloc()

One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:

struct foo {
    int stuff;
    void *entry[];
};

instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);

Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:

instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);

This issue was detected with the help of Coccinelle.
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 590ce401
...@@ -234,8 +234,8 @@ mlxsw_sp_acl_bf_init(struct mlxsw_sp *mlxsw_sp, unsigned int num_erp_banks) ...@@ -234,8 +234,8 @@ mlxsw_sp_acl_bf_init(struct mlxsw_sp *mlxsw_sp, unsigned int num_erp_banks)
* is 2^ACL_MAX_BF_LOG * is 2^ACL_MAX_BF_LOG
*/ */
bf_bank_size = 1 << MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_BF_LOG); bf_bank_size = 1 << MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_BF_LOG);
bf = kzalloc(sizeof(*bf) + bf_bank_size * num_erp_banks * bf = kzalloc(struct_size(bf, refcnt, bf_bank_size * num_erp_banks),
sizeof(*bf->refcnt), GFP_KERNEL); GFP_KERNEL);
if (!bf) if (!bf)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment