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s390/appldata: use struct_size() helper

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Message-Id: <20200617212930.GA11728@embeddedor>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Gustavo A. R. Silva 2020-06-17 16:29:30 -05:00 committed by Heiko Carstens
parent 6ffb3f6b46
commit 28ccce5f50
1 changed files with 2 additions and 4 deletions
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6
arch/s390/appldata/appldata_os.c
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@ -129,8 +129,7 @@ static void appldata_get_os_data(void *data)
os_data->nr_cpus = j;
new_size = sizeof(struct appldata_os_data) +
(os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
new_size = struct_size(os_data, os_cpu, os_data->nr_cpus);
if (ops.size != new_size) {
if (ops.active) {
rc = appldata_diag(APPLDATA_RECORD_OS_ID,
@ -165,8 +164,7 @@ static int __init appldata_os_init(void)
{
int rc, max_size;
max_size = sizeof(struct appldata_os_data) +
(num_possible_cpus() * sizeof(struct appldata_os_per_cpu));
max_size = struct_size(appldata_os_data, os_cpu, num_possible_cpus());
if (max_size > APPLDATA_MAX_REC_SIZE) {
pr_err("Maximum OS record size %i exceeds the maximum "
"record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);