diff options
| author | Zhen Lei <thunder.leizhen@huawei.com> | 2023-04-21 15:24:21 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-05-22 17:09:51 +0200 |
| commit | 5d62bacc059bb4f783e1d2ad88874abb6056f404 (patch) | |
| tree | 043ae8b9a2d5a2db9a974d80c9a190b6bdfb70a0 /drivers/iommu/iova.c | |
| parent | 44c026a73be8038f03dbdeef028b642880cf1511 (diff) | |
iommu/iova: Optimize iova_magazine_alloc()
Only the member 'size' needs to be initialized to 0. Clearing the array
pfns[], which is about 1 KiB in size, not only wastes time, but also
causes cache pollution.
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20230421072422.869-1-thunder.leizhen@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iova.c')
| -rw-r--r-- | drivers/iommu/iova.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index fe452ce46642..10b964600948 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -647,7 +647,13 @@ struct iova_rcache { static struct iova_magazine *iova_magazine_alloc(gfp_t flags) { - return kzalloc(sizeof(struct iova_magazine), flags); + struct iova_magazine *mag; + + mag = kmalloc(sizeof(*mag), flags); + if (mag) + mag->size = 0; + + return mag; } static void iova_magazine_free(struct iova_magazine *mag) |