resource: Make resource_alignment() input const resource

resource_alignment() does not need to change resource so it can be made
const.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260429122617.7324-6-ilpo.jarvinen@linux.intel.com

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 3c73c9c0d4f7fe8c85658ebb1e95b33a269e476f..f7930b3dfd0a5ee4b0fee8a7d960e742d1904548 100644 (file)
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -261,7 +261,7 @@ extern int allocate_resource(struct resource *root, struct resource *new,
 struct resource *lookup_resource(struct resource *root, resource_size_t start);
 int adjust_resource(struct resource *res, resource_size_t start,
                    resource_size_t size);
-resource_size_t resource_alignment(struct resource *res);
+resource_size_t resource_alignment(const struct resource *res);
 
 /**
  * resource_set_size - Calculate resource end address from size and start

diff --git a/kernel/resource.c b/kernel/resource.c
index d02a53fb95d85d754de55b898863b3ac27be7bf5..3d17e3196a3ec6520fdf288510a0b383e0de2166 100644 (file)
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1238,7 +1238,7 @@ reserve_region_with_split(struct resource *root, resource_size_t start,
  *
  * Returns alignment on success, 0 (invalid alignment) on failure.
  */
-resource_size_t resource_alignment(struct resource *res)
+resource_size_t resource_alignment(const struct resource *res)
 {
        switch (res->flags & (IORESOURCE_SIZEALIGN | IORESOURCE_STARTALIGN)) {
        case IORESOURCE_SIZEALIGN: