diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-31 04:00:15 +0300 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2019-02-07 02:16:08 +0300 |
| commit | 1eb6ea4a820291107d1192df7d279f344ee2053f (patch) | |
| tree | 1ba0bb003f2a2d265d295de9aa90b5259ff72840 /drivers/gpu/drm/vc4 | |
| parent | 8c77b2224306c06443a9270ff640faf143ed0183 (diff) | |
| download | linux-1eb6ea4a820291107d1192df7d279f344ee2053f.tar.xz | |
drm/vc4: 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) + 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: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190131010015.GA32272@embeddedor
Diffstat (limited to 'drivers/gpu/drm/vc4')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_perfmon.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_perfmon.c b/drivers/gpu/drm/vc4/vc4_perfmon.c index 437e7a27f21d..495150415020 100644 --- a/drivers/gpu/drm/vc4/vc4_perfmon.c +++ b/drivers/gpu/drm/vc4/vc4_perfmon.c @@ -117,7 +117,7 @@ int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data, return -EINVAL; } - perfmon = kzalloc(sizeof(*perfmon) + (req->ncounters * sizeof(u64)), + perfmon = kzalloc(struct_size(perfmon, counters, req->ncounters), GFP_KERNEL); if (!perfmon) return -ENOMEM; |