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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-01-08 10:27:00 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-18 09:58:04 +0100
commit6041828fdae09b973d3eed4e2c1ae82ddcf28c58 (patch)
tree6ad1297caf5c4e8cb90024b9e32892cd5bd34dda /drivers/uwb
parentda79ff6e586bd5aaa3bd9c73e56ae9d9183c3263 (diff)
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uwb: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uwb')
-rw-r--r--drivers/uwb/drp-ie.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/uwb/drp-ie.c b/drivers/uwb/drp-ie.c
index 1d2a939cfcf8..ed993e363472 100644
--- a/drivers/uwb/drp-ie.c
+++ b/drivers/uwb/drp-ie.c
@@ -125,9 +125,8 @@ static struct uwb_ie_drp *uwb_drp_ie_alloc(void)
{
struct uwb_ie_drp *drp_ie;
- drp_ie = kzalloc(sizeof(struct uwb_ie_drp) +
- UWB_NUM_ZONES * sizeof(struct uwb_drp_alloc),
- GFP_KERNEL);
+ drp_ie = kzalloc(struct_size(drp_ie, allocs, UWB_NUM_ZONES),
+ GFP_KERNEL);
if (drp_ie)
drp_ie->hdr.element_id = UWB_IE_DRP;
return drp_ie;