drivers/base/memory: use "unsigned long" for block ids

Block ids are just shifted section numbers, so let's also use "unsigned
long" for them, too.

Link: http://lkml.kernel.org/r/20190614100114.311-3-david@redhat.comSigned-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/base/memory.c

@@ -34,12 +34,12 @@ static DEFINE_MUTEX(mem_sysfs_mutex);
 
 static int sections_per_block;
 
-static inline int base_memory_block_id(unsigned long section_nr)
+static inline unsigned long base_memory_block_id(unsigned long section_nr)
 {
 	return section_nr / sections_per_block;
 }
 
-static inline int pfn_to_block_id(unsigned long pfn)
+static inline unsigned long pfn_to_block_id(unsigned long pfn)
 {
 	return base_memory_block_id(pfn_to_section_nr(pfn));
 }
@@ -587,7 +587,7 @@ int __weak arch_get_memory_phys_device(unsigned long start_pfn)
  * A reference for the returned object is held and the reference for the
  * hinted object is released.
  */
-static struct memory_block *find_memory_block_by_id(int block_id,
+static struct memory_block *find_memory_block_by_id(unsigned long block_id,
 						    struct memory_block *hint)
 {
 	struct device *hintdev = hint ? &hint->dev : NULL;
@@ -604,7 +604,7 @@ static struct memory_block *find_memory_block_by_id(int block_id,
 struct memory_block *find_memory_block_hinted(struct mem_section *section,
 					      struct memory_block *hint)
 {
-	int block_id = base_memory_block_id(__section_nr(section));
+	unsigned long block_id = base_memory_block_id(__section_nr(section));
 
 	return find_memory_block_by_id(block_id, hint);
 }
@@ -663,8 +663,8 @@ int register_memory(struct memory_block *memory)
 	return ret;
 }
 
-static int init_memory_block(struct memory_block **memory, int block_id,
-			     unsigned long state)
+static int init_memory_block(struct memory_block **memory,
+			     unsigned long block_id, unsigned long state)
 {
 	struct memory_block *mem;
 	unsigned long start_pfn;
@@ -729,8 +729,8 @@ static void unregister_memory(struct memory_block *memory)
  */
 int create_memory_block_devices(unsigned long start, unsigned long size)
 {
-	const int start_block_id = pfn_to_block_id(PFN_DOWN(start));
-	int end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
+	const unsigned long start_block_id = pfn_to_block_id(PFN_DOWN(start));
+	unsigned long end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
 	struct memory_block *mem;
 	unsigned long block_id;
 	int ret = 0;
@@ -766,10 +766,10 @@ int create_memory_block_devices(unsigned long start, unsigned long size)
  */
 void remove_memory_block_devices(unsigned long start, unsigned long size)
 {
-	const int start_block_id = pfn_to_block_id(PFN_DOWN(start));
-	const int end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
+	const unsigned long start_block_id = pfn_to_block_id(PFN_DOWN(start));
+	const unsigned long end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
 	struct memory_block *mem;
-	int block_id;
+	unsigned long block_id;
 
 	if (WARN_ON_ONCE(!IS_ALIGNED(start, memory_block_size_bytes()) ||
 			 !IS_ALIGNED(size, memory_block_size_bytes())))