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authorXie Yongji <xieyongji@bytedance.com>2021-08-31 13:36:22 +0300
committerMichael S. Tsirkin <mst@redhat.com>2021-09-06 14:20:56 +0300
commita93a962669cdbe56bb0bcd88156f0f1598f31c88 (patch)
tree5779bd356d7e499a76d8e137eb7233bb93f0c479 /drivers/iommu
parent6105d1fe6f4c24ce8c13e2e6568b16b76e04983d (diff)
downloadlinux-a93a962669cdbe56bb0bcd88156f0f1598f31c88.tar.xz
iova: Export alloc_iova_fast() and free_iova_fast()
Export alloc_iova_fast() and free_iova_fast() so that some modules can make use of the per-CPU cache to get rid of rbtree spinlock in alloc_iova() and free_iova() during IOVA allocation. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210831103634.33-2-xieyongji@bytedance.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iova.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index b6cf5f16123b..3941ed6bb99b 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -521,6 +521,7 @@ retry:
return new_iova->pfn_lo;
}
+EXPORT_SYMBOL_GPL(alloc_iova_fast);
/**
* free_iova_fast - free iova pfn range into rcache
@@ -538,6 +539,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size)
free_iova(iovad, pfn);
}
+EXPORT_SYMBOL_GPL(free_iova_fast);
#define fq_ring_for_each(i, fq) \
for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)