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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-16 00:19:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-17 08:10:47 +0300 |
| commit | c5c3899de09e307e3a0999ab8d620ab0ede05aa1 (patch) | |
| tree | 57860f2ba46c284566d5b71a77735174394ee824 /net/openvswitch | |
| parent | 3fcb3f9b68b048d6b44d5cfabe21ee3145b90424 (diff) | |
| download | linux-c5c3899de09e307e3a0999ab8d620ab0ede05aa1.tar.xz | |
openvswitch: meter: 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;
struct boo entry[];
};
instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), 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 S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/meter.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c index c038e021a591..43849d752a1e 100644 --- a/net/openvswitch/meter.c +++ b/net/openvswitch/meter.c @@ -206,8 +206,7 @@ static struct dp_meter *dp_meter_create(struct nlattr **a) return ERR_PTR(-EINVAL); /* Allocate and set up the meter before locking anything. */ - meter = kzalloc(n_bands * sizeof(struct dp_meter_band) + - sizeof(*meter), GFP_KERNEL); + meter = kzalloc(struct_size(meter, bands, n_bands), GFP_KERNEL); if (!meter) return ERR_PTR(-ENOMEM); |