[RESEND PATCH v3 1/4] iommu/iova: Add free_all_cpu_cached_iovas()

2020-11-17 Thread John Garry 
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 
---
 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 30d969a4c5fd..81b7399dd5e8 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -227,6 +227,14 @@ 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);
@@ -422,15 +430,12 @@ 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);
goto retry;
}
 
-- 
2.26.2

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[PATCH v3 1/4] iommu/iova: Add free_all_cpu_cached_iovas()

2020-11-12 Thread John Garry 
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 
---
 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 30d969a4c5fd..81b7399dd5e8 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -227,6 +227,14 @@ 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);
@@ -422,15 +430,12 @@ 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);
goto retry;
}
 
-- 
2.26.2

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