--- zzzz-none-000/linux-3.10.107/arch/alpha/include/asm/word-at-a-time.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/alpha/include/asm/word-at-a-time.h	2021-02-04 17:41:59.000000000 +0000
@@ -52,4 +52,6 @@
 #endif
 }
 
+#define zero_bytemask(mask) ((2ul << (find_zero(mask) * 8)) - 1)
+
 #endif /* _ASM_WORD_AT_A_TIME_H */