const unsigned long *src2, unsigned int nbits)
{
if (small_const_nbits(nbits))
- return ! ((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
+ return !((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
#ifdef CONFIG_S390
- else if (__builtin_constant_p(nbits) && (nbits % BITS_PER_LONG) == 0)
+ if (__builtin_constant_p(nbits) && (nbits % BITS_PER_LONG) == 0)
return !memcmp(src1, src2, nbits / 8);
#endif
- else
- return __bitmap_equal(src1, src2, nbits);
+ return __bitmap_equal(src1, src2, nbits);
}
static inline int bitmap_intersects(const unsigned long *src1,
return __bitmap_parse(buf, buflen, 0, maskp, nmaskbits);
}
+/*
+ * bitmap_from_u64 - Check and swap words within u64.
+ * @mask: source bitmap
+ * @dst: destination bitmap
+ *
+ * In 32-bit Big Endian kernel, when using (u32 *)(&val)[*]
+ * to read u64 mask, we will get the wrong word.
+ * That is "(u32 *)(&val)[0]" gets the upper 32 bits,
+ * but we expect the lower 32-bits of u64.
+ */
+static inline void bitmap_from_u64(unsigned long *dst, u64 mask)
+{
+ dst[0] = mask & ULONG_MAX;
+
+ if (sizeof(mask) > sizeof(unsigned long))
+ dst[1] = mask >> 32;
+}
+
#endif /* __ASSEMBLY__ */
#endif /* __LINUX_BITMAP_H */