linux-kernel - [PATCH v2 1/6] iommu: Export iommu_{get,put}_resv

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Date:   Tue, 16 Nov 2021 17:06:20 +0800
From:   Yicong Yang <yangyicong@...ilicon.com>
To:     <gregkh@...uxfoundation.org>, <helgaas@...nel.org>,
        <alexander.shishkin@...ux.intel.com>, <lorenzo.pieralisi@....com>,
        <will@...nel.org>, <mark.rutland@....com>,
        <mathieu.poirier@...aro.org>, <suzuki.poulose@....com>,
        <mike.leach@...aro.org>, <leo.yan@...aro.org>,
        <jonathan.cameron@...wei.com>, <daniel.thompson@...aro.org>,
        <joro@...tes.org>, <john.garry@...wei.com>,
        <shameerali.kolothum.thodi@...wei.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <coresight@...ts.linaro.org>, <linux-pci@...r.kernel.org>,
        <linux-perf-users@...r.kernel.org>,
        <iommu@...ts.linux-foundation.org>
CC:     <prime.zeng@...wei.com>, <liuqi115@...wei.com>,
        <zhangshaokun@...ilicon.com>, <linuxarm@...wei.com>,
        <yangyicong@...ilicon.com>, <song.bao.hua@...ilicon.com>
Subject: [PATCH v2 1/6] iommu: Export iommu_{get,put}_resv_regions()

Export iommu_{get,put}_resv_regions() to the modules so that the driver
can retrieve and use the reserved regions of the device.

Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
---
 drivers/iommu/iommu.c | 2 ++
 include/linux/iommu.h | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index dd7863e453a5..e96711eee965 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2792,6 +2792,7 @@ void iommu_get_resv_regions(struct device *dev, struct list_head *list)
 	if (ops && ops->get_resv_regions)
 		ops->get_resv_regions(dev, list);
 }
+EXPORT_SYMBOL_GPL(iommu_get_resv_regions);
 
 void iommu_put_resv_regions(struct device *dev, struct list_head *list)
 {
@@ -2800,6 +2801,7 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list)
 	if (ops && ops->put_resv_regions)
 		ops->put_resv_regions(dev, list);
 }
+EXPORT_SYMBOL_GPL(iommu_put_resv_regions);
 
 /**
  * generic_iommu_put_resv_regions - Reserved region driver helper
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d2f3435e7d17..1b7b0f370e28 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -450,8 +450,8 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t io
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
 			iommu_fault_handler_t handler, void *token);
 
-extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
-extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
+void iommu_get_resv_regions(struct device *dev, struct list_head *list);
+void iommu_put_resv_regions(struct device *dev, struct list_head *list);
 extern void generic_iommu_put_resv_regions(struct device *dev,
 					   struct list_head *list);
 extern void iommu_set_default_passthrough(bool cmd_line);
-- 
2.33.0