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-rw-r--r--drivers/iommu/iommu-debugfs.c23
1 files changed, 4 insertions, 19 deletions
diff --git a/drivers/iommu/iommu-debugfs.c b/drivers/iommu/iommu-debugfs.c
index 3b1bf88fd1b0..f03548942096 100644
--- a/drivers/iommu/iommu-debugfs.c
+++ b/drivers/iommu/iommu-debugfs.c
@@ -12,6 +12,7 @@
12#include <linux/debugfs.h> 12#include <linux/debugfs.h>
13 13
14struct dentry *iommu_debugfs_dir; 14struct dentry *iommu_debugfs_dir;
15EXPORT_SYMBOL_GPL(iommu_debugfs_dir);
15 16
16/** 17/**
17 * iommu_debugfs_setup - create the top-level iommu directory in debugfs 18 * iommu_debugfs_setup - create the top-level iommu directory in debugfs
@@ -23,9 +24,9 @@ struct dentry *iommu_debugfs_dir;
23 * Emit a strong warning at boot time to indicate that this feature is 24 * Emit a strong warning at boot time to indicate that this feature is
24 * enabled. 25 * enabled.
25 * 26 *
26 * This function is called from iommu_init; drivers may then call 27 * This function is called from iommu_init; drivers may then use
27 * iommu_debugfs_new_driver_dir() to instantiate a vendor-specific 28 * iommu_debugfs_dir to instantiate a vendor-specific directory to be used
28 * directory to be used to expose internal data. 29 * to expose internal data.
29 */ 30 */
30void iommu_debugfs_setup(void) 31void iommu_debugfs_setup(void)
31{ 32{
@@ -48,19 +49,3 @@ void iommu_debugfs_setup(void)
48 pr_warn("*************************************************************\n"); 49 pr_warn("*************************************************************\n");
49 } 50 }
50} 51}
51
52/**
53 * iommu_debugfs_new_driver_dir - create a vendor directory under debugfs/iommu
54 * @vendor: name of the vendor-specific subdirectory to create
55 *
56 * This function is called by an IOMMU driver to create the top-level debugfs
57 * directory for that driver.
58 *
59 * Return: upon success, a pointer to the dentry for the new directory.
60 * NULL in case of failure.
61 */
62struct dentry *iommu_debugfs_new_driver_dir(const char *vendor)
63{
64 return debugfs_create_dir(vendor, iommu_debugfs_dir);
65}
66EXPORT_SYMBOL_GPL(iommu_debugfs_new_driver_dir);