resources: Move struct resource_list_entry from ACPI into resource core

Currently ACPI, PCI and pnp all implement the same resource list
management with different data structure. We need to transfer from
one data structure into another when passing resources from one
subsystem into another subsystem. So move struct resource_list_entry
from ACPI into resource core and rename it as resource_entry,
then it could be reused by different subystems and avoid the data
structure conversion.

Introduce dedicated header file resource_ext.h instead of embedding
it into ioport.h to avoid header file inclusion order issues.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/kernel/resource.c b/kernel/resource.c
index 0bcebffc4e77..19f2357dfda3 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -22,6 +22,7 @@
 #include <linux/device.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
+#include <linux/resource_ext.h>
 #include <asm/io.h>
 
 
@@ -1529,6 +1530,30 @@ int iomem_is_exclusive(u64 addr)
         return err;
 }
 
+struct resource_entry *resource_list_create_entry(struct resource *res,
+                                                  size_t extra_size)
+{
+        struct resource_entry *entry;
+
+        entry = kzalloc(sizeof(*entry) + extra_size, GFP_KERNEL);
+        if (entry) {
+                INIT_LIST_HEAD(&entry->node);
+                entry->res = res ? res : &entry->__res;
+        }
+
+        return entry;
+}
+EXPORT_SYMBOL(resource_list_create_entry);
+
+void resource_list_free(struct list_head *head)
+{
+        struct resource_entry *entry, *tmp;
+
+        list_for_each_entry_safe(entry, tmp, head, node)
+                resource_list_destroy_entry(entry);
+}
+EXPORT_SYMBOL(resource_list_free);
+
 static int __init strict_iomem(char *str)
 {
         if (strstr(str, "relaxed"))