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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/tools/include/linux/bitmap.h
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@@ -15,6 +15,9 @@
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 		 const unsigned long *bitmap2, int bits);
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 int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
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 		 const unsigned long *bitmap2, unsigned int bits);
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+int __bitmap_equal(const unsigned long *bitmap1,
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+		   const unsigned long *bitmap2, unsigned int bits);
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+void bitmap_clear(unsigned long *map, unsigned int start, int len);
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 #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
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@@ -123,6 +126,15 @@
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 }
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 /*
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+ * bitmap_free - Free bitmap
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+ * @bitmap: pointer to bitmap
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+ */
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+static inline void bitmap_free(unsigned long *bitmap)
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+{
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+	free(bitmap);
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+}
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+
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+/*
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  * bitmap_scnprintf - print bitmap list into buffer
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  * @bitmap: bitmap
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  * @nbits: size of bitmap
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@@ -147,4 +159,23 @@
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 	return __bitmap_and(dst, src1, src2, nbits);
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 }
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+#ifdef __LITTLE_ENDIAN
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+#define BITMAP_MEM_ALIGNMENT 8
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+#else
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+#define BITMAP_MEM_ALIGNMENT (8 * sizeof(unsigned long))
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+#endif
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+#define BITMAP_MEM_MASK (BITMAP_MEM_ALIGNMENT - 1)
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+#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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+
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+static inline int bitmap_equal(const unsigned long *src1,
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+			const unsigned long *src2, unsigned int nbits)
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+{
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+	if (small_const_nbits(nbits))
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+		return !((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
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+	if (__builtin_constant_p(nbits & BITMAP_MEM_MASK) &&
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+	    IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT))
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+		return !memcmp(src1, src2, nbits / 8);
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+	return __bitmap_equal(src1, src2, nbits);
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+}
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+
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 #endif /* _PERF_BITOPS_H */