Similarly to bitmap_remap, test bitmap_bitremap().

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 lib/test_bitmap.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index e1c22d399f24..e9211f9a0e67 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -378,6 +378,19 @@ static void __init test_weight(void)
 	}
 }
 
+static __always_inline void __init __test_bitremap(unsigned long *dst, unsigned long *src,
+				unsigned long *old, unsigned long *new, unsigned long nbits)
+{
+	unsigned long oldbit, newbit;
+
+	bitmap_zero(dst, nbits);
+
+	for_each_set_bit(oldbit, src, nbits) {
+		newbit = bitmap_bitremap(oldbit, old, new, nbits);
+		__set_bit(newbit, dst);
+	}
+}
+
 static void __init test_remap(void)
 {
 	DECLARE_BITMAP(dst, 8);
@@ -402,6 +415,9 @@ static void __init test_remap(void)
 	bitmap_remap(dst, src, old, new, 8);
 	expect_eq_bitmap(exp0, dst, 8);
 
+	__test_bitremap(dst, src, old, new, 8);
+	expect_eq_bitmap(exp0, dst, 8);
+
 	/*
 	 * When old mapping is the same as new, source bits are copied to dst.
 	 * Real code must use bitmap_copy() if it's known in advance.
@@ -409,6 +425,9 @@ static void __init test_remap(void)
 	bitmap_remap(dst, src, old, old, 8);
 	expect_eq_bitmap(src, dst, 8);
 
+	__test_bitremap(dst, src, old, old, 8);
+	expect_eq_bitmap(src, dst, 8);
+
 	bitmap_remap(dst, src, new, new, 8);
 	expect_eq_bitmap(src, dst, 8);
 
@@ -419,23 +438,38 @@ static void __init test_remap(void)
 	bitmap_remap(dst, src, empty, new, 8);
 	expect_eq_bitmap(src, dst, 8);
 
+	__test_bitremap(dst, src, empty, new, 8);
+	expect_eq_bitmap(src, dst, 8);
+
 	bitmap_remap(dst, src, old, empty, 8);
 	expect_eq_bitmap(src, dst, 8);
 
+	__test_bitremap(dst, src, old, empty, 8);
+	expect_eq_bitmap(src, dst, 8);
+
 	bitmap_remap(dst, src, empty, empty, 8);
 	expect_eq_bitmap(src, dst, 8);
 
+	__test_bitremap(dst, src, empty, empty, 8);
+	expect_eq_bitmap(src, dst, 8);
+
 	/* Set extra bit in old map to test carry logic */
 	set_bit(5, old);
 	bitmap_remap(dst, src, old, new, 8);
 	expect_eq_bitmap(exp1, dst, 8);
 
+	__test_bitremap(dst, src, old, new, 8);
+	expect_eq_bitmap(exp1, dst, 8);
+
 	/* Map old bits to #7 */
 	bitmap_zero(new, 8);
 	set_bit(7, new);
 	bitmap_remap(dst, src, old, new, 8);
 	expect_eq_bitmap(exp2, dst, 8);
 
+	__test_bitremap(dst, src, old, new, 8);
+	expect_eq_bitmap(exp2, dst, 8);
+
 	bitmap_fill(perf_src, 1000);
 	bitmap_set(perf_old, 0, 500);
 	bitmap_clear(perf_old, 500, 500);
-- 
2.39.2