arch/powerpc: provide zero_bytemask() for big-endian

For some reason, only the little-endian flavor of powerpc provided the zero_bytemask() implementation. Reported-by: Michal Sojka <[email protected]> Acked-by: Michael Ellerman <[email protected]> Signed-off-by: Chris Metcalf <[email protected]>
jackyding2679 · Oct 8, 2015 · 7a5692e · 7a5692e
1 parent c6fa8e6
commit 7a5692e
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/arch/powerpc/include/asm/word-at-a-time.h b/arch/powerpc/include/asm/word-at-a-time.h
@@ -40,6 +40,11 @@ static inline bool has_zero(unsigned long val, unsigned long *data, const struct
 	return (val + c->high_bits) & ~rhs;
 }
 
+static inline unsigned long zero_bytemask(unsigned long mask)
+{
+	return ~1ul << __fls(mask);
+}
+
 #else
 
 #ifdef CONFIG_64BIT