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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-09 18:35:41 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-01-18 09:34:19 +0100 |
| commit | c6ac875446f96564232931fafd149e43e728dd6f (patch) | |
| tree | 1091c28245f05d8e5a6ad2999ccf5fec82f4f9cf /arch/s390 | |
| parent | s390/kasan: improve string/memory functions checks (diff) | |
| download | linux-c6ac875446f96564232931fafd149e43e728dd6f.tar.xz linux-c6ac875446f96564232931fafd149e43e728dd6f.zip | |
s390/hypfs: 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 code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/hypfs/hypfs_diag0c.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/s390/hypfs/hypfs_diag0c.c b/arch/s390/hypfs/hypfs_diag0c.c index cebf05150cc1..9c398bf0ddc6 100644 --- a/arch/s390/hypfs/hypfs_diag0c.c +++ b/arch/s390/hypfs/hypfs_diag0c.c @@ -54,8 +54,7 @@ static void *diag0c_store(unsigned int *count) if (!cpu_vec) goto fail_put_online_cpus; /* Note: Diag 0c needs 8 byte alignment and real storage */ - diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) + - cpu_count * sizeof(struct hypfs_diag0c_entry), + diag0c_data = kzalloc(struct_size(diag0c_data, entry, cpu_count), GFP_KERNEL | GFP_DMA); if (!diag0c_data) goto fail_kfree_cpu_vec; |