parisc: ccio-dma: Create private runway procfs root entry

Create an own procfs "runway" root entry for the CCIO driver.
No need to share it with the sba_iommu driver, as only one
of those busses can be active in one machine anyway.

Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 5472595 ("parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu")
Cc: <stable@vger.kernel.org> # v6.5

Author: hdeller

arch/parisc/include/asm/runway.h

@@ -2,9 +2,6 @@
 #ifndef ASM_PARISC_RUNWAY_H
 #define ASM_PARISC_RUNWAY_H
 
-/* declared in arch/parisc/kernel/setup.c */
-extern struct proc_dir_entry * proc_runway_root;
-
 #define RUNWAY_STATUS	0x10
 #define RUNWAY_DEBUG	0x40
 

drivers/parisc/ccio-dma.c

@@ -63,8 +63,6 @@
 #undef CCIO_COLLECT_STATS
 #endif
 
-#include <asm/runway.h>		/* for proc_runway_root */
-
 #ifdef DEBUG_CCIO_INIT
 #define DBG_INIT(x...)  printk(x)
 #else
@@ -1559,10 +1557,15 @@ static int __init ccio_probe(struct parisc_device *dev)
 
 #ifdef CONFIG_PROC_FS
 	if (ioc_count == 0) {
-		proc_create_single(MODULE_NAME, 0, proc_runway_root,
+		struct proc_dir_entry *runway;
+
+		runway = proc_mkdir("bus/runway", NULL);
+		if (runway) {
+			proc_create_single(MODULE_NAME, 0, runway,
 				ccio_proc_info);
-		proc_create_single(MODULE_NAME"-bitmap", 0, proc_runway_root,
+			proc_create_single(MODULE_NAME"-bitmap", 0, runway,
 				ccio_proc_bitmap_info);
+		}
 	}
 #endif
 	ioc_count++;

drivers/parisc/sba_iommu.c

@@ -121,7 +121,7 @@ module_param(sba_reserve_agpgart, int, 0444);
 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART");
 #endif
 
-struct proc_dir_entry *proc_runway_root __ro_after_init;
+static struct proc_dir_entry *proc_runway_root __ro_after_init;
 struct proc_dir_entry *proc_mckinley_root __ro_after_init;
 
 /************************************