[PATCH v3] drivers: base: Add prototype declaration to the header file

[Rashika Kheria <rashika.kheria@gmail.com>]

Add prototype declaration of function memory_block_size_bytes() to
the header file include/linux/memory.h.

This eliminates the following warning in memory.c:
drivers/base/memory.c:87:1: warning: no previous prototype for ‘memory_block_size_bytes’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
---

Changes since v2:
Checkpatch error

 include/linux/memory.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/memory.h b/include/linux/memory.h
index 9a6bbf7..bb7384e 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -35,6 +35,7 @@ struct memory_block {
 };
 
 int arch_get_memory_phys_device(unsigned long start_pfn);
+unsigned long __weak memory_block_size_bytes(void);
 
 /* These states are exposed to userspace as text strings in sysfs */
 #define	MEM_ONLINE		(1<<0) /* exposed to userspace */
-- 
1.7.9.5