[PATCH] alpha: csum_partial_copy.c: add function prototypes from <net/checksum.h>

[Randy Dunlap]

Fix "no previous prototype" W=1 warnings from the kernel test robot:

../arch/alpha/lib/csum_partial_copy.c:349:1: error: no previous prototype for 'csum_and_copy_from_user' [-Werror=missing-prototypes]
  349 | csum_and_copy_from_user(const void __user *src, void *dst, int len)
      | ^~~~~~~~~~~~~~~~~~~~~~~
../arch/alpha/lib/csum_partial_copy.c:358:1: error: no previous prototype for 'csum_partial_copy_nocheck' [-Werror=missing-prototypes]
  358 | csum_partial_copy_nocheck(const void *src, void *dst, int len)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 808b49da54e6 ("alpha: turn csum_partial_copy_from_user() into csum_and_copy_from_user()")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: linux-alpha@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Adding the header file suggested by Al.

 arch/alpha/lib/csum_partial_copy.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210423.orig/arch/alpha/lib/csum_partial_copy.c
+++ linux-next-20210423/arch/alpha/lib/csum_partial_copy.c
@@ -13,6 +13,7 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/uaccess.h>
+#include <net/checksum.h>
 
 
 #define ldq_u(x,y) \