drivers/char/mem.c: clean up the code

Reduce the lines of code and simplify the logic.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 1256454..436a990 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -47,10 +47,7 @@ static inline unsigned long size_inside_page(unsigned long start,
 #ifndef ARCH_HAS_VALID_PHYS_ADDR_RANGE
 static inline int valid_phys_addr_range(unsigned long addr, size_t count)
 {
-       if (addr + count > __pa(high_memory))
-               return 0;
-
-       return 1;
+       return addr + count <= __pa(high_memory);
 }
 
 static inline int valid_mmap_phys_addr_range(unsigned long pfn, size_t size)