Add a helper function to free the CPU rcache for all online CPUs.
There also exists a function of the same name in
drivers/iommu/intel/iommu.c, but the parameters are different, and there
should be no conflict.
Signed-off-by: John Garry <john.ga...@huawei.com>
Tested-by: Xiang Chen <chenxian...@hisilicon.com>
Reviewed-by: Zhen Lei <thunder.leiz...@huawei.com>
---
drivers/iommu/iova.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index f9c35852018d..cf1aacda2fe4 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -238,6 +238,14 @@ static int __alloc_and_insert_iova_range(struct
iova_domain *iovad,
return -ENOMEM;
}
+static void free_all_cpu_cached_iovas(struct iova_domain *iovad)
+{
+ unsigned int cpu;
+
+ for_each_online_cpu(cpu)
+ free_cpu_cached_iovas(cpu, iovad);
+}
+
static struct kmem_cache *iova_cache;
static unsigned int iova_cache_users;
static DEFINE_MUTEX(iova_cache_mutex);
@@ -435,15 +443,12 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long
size,
retry:
new_iova = alloc_iova(iovad, size, limit_pfn, true);
if (!new_iova) {
- unsigned int cpu;
-
if (!flush_rcache)
return 0;
/* Try replenishing IOVAs by flushing rcache. */
flush_rcache = false;
- for_each_online_cpu(cpu)
- free_cpu_cached_iovas(cpu, iovad);
+ free_all_cpu_cached_iovas(iovad);
free_global_cached_iovas(iovad);
goto retry;
}
--
2.26.2
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