[PATCH] alpha: fix sparse warnings

- add missing "__user" annotations in csum_partial_copy.c;
- make io_remap_page_range more readable and fix a warning.

arch/alpha/lib/csum_partial_copy.c

@@ -251,7 +251,8 @@ csum_partial_cfu_src_aligned(const unsigned long __user *src,
  * look at this too closely, you'll go blind.
  */
 static inline unsigned long
-csum_partial_cfu_unaligned(const unsigned long * src, unsigned long * dst,
+csum_partial_cfu_unaligned(const unsigned long __user * src,
+			   unsigned long * dst,
 			   unsigned long soff, unsigned long doff,
 			   long len, unsigned long checksum,
 			   unsigned long partial_dest,
@@ -383,7 +384,8 @@ csum_partial_copy_from_user(const char __user *src, char *dst, int len,
 }
 
 unsigned int
-csum_partial_copy_nocheck(const char *src, char *dst, int len, unsigned int sum)
+csum_partial_copy_nocheck(const char __user *src, char *dst, int len,
+			  unsigned int sum)
 {
 	return do_csum_partial_copy_from_user(src, dst, len, sum, NULL);
 }

include/asm-alpha/pgtable.h

@@ -328,7 +328,11 @@ extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
 #endif
 
 #define io_remap_page_range(vma, start, busaddr, size, prot)	\
-    remap_pfn_range(vma, start, virt_to_phys(ioremap(busaddr, size)) >> PAGE_SHIFT, size, prot)
+({								\
+	void *va = (void __force *)ioremap(busaddr, size);	\
+	unsigned long pfn = virt_to_phys(va) >> PAGE_SHIFT;	\
+	remap_pfn_range(vma, start, pfn, size, prot);		\
+})
 
 #define pte_ERROR(e) \
 	printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))