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author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-09 18:23:54 +0100 |
---|---|---|
committer | David Howells <dhowells@redhat.com> | 2019-01-10 18:12:05 +0100 |
commit | c2b8bd49d35a768d3966c5e14e8f6971f2a63439 (patch) | |
tree | dd3905b2ed51027ad57009b9eff8e7a2e873667c | |
parent | Merge branch 'akpm' (patches from Andrew) (diff) | |
download | linux-c2b8bd49d35a768d3966c5e14e8f6971f2a63439.tar.xz linux-c2b8bd49d35a768d3966c5e14e8f6971f2a63439.zip |
afs: 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: David Howells <dhowells@redhat.com>
-rw-r--r-- | fs/afs/server_list.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/afs/server_list.c b/fs/afs/server_list.c index 95d0761cdb34..155dc14caef9 100644 --- a/fs/afs/server_list.c +++ b/fs/afs/server_list.c @@ -42,9 +42,7 @@ struct afs_server_list *afs_alloc_server_list(struct afs_cell *cell, if (vldb->fs_mask[i] & type_mask) nr_servers++; - slist = kzalloc(sizeof(struct afs_server_list) + - sizeof(struct afs_server_entry) * nr_servers, - GFP_KERNEL); + slist = kzalloc(struct_size(slist, servers, nr_servers), GFP_KERNEL); if (!slist) goto error; |