lib/test_bitmap.c: add bitmap_zero()/bitmap_clear() test cases

Web:        https://git.kernel.org/torvalds/c/ee3527bd5e48e6c892abfdcb36969c1eb2fd4a6e
Commit:     ee3527bd5e48e6c892abfdcb36969c1eb2fd4a6e
Parent:     3aa56885e51683a19c8aa71739fd279b3f501cd7
Refname:    refs/heads/master
Author:     Andy Shevchenko <[email protected]>
AuthorDate: Tue Feb 6 15:38:10 2018 -0800
Committer:  Linus Torvalds <[email protected]>
CommitDate: Tue Feb 6 18:32:44 2018 -0800

    lib/test_bitmap.c: add bitmap_zero()/bitmap_clear() test cases
    
    Explicitly test bitmap_zero() and bitmap_clear() functions.
    
    Link: http://lkml.kernel.org/r/[email protected]
    Signed-off-by: Andy Shevchenko <[email protected]>
    Reviewed-by: Yury Norov <[email protected]>
    Cc: Rasmus Villemoes <[email protected]>
    Cc: Randy Dunlap <[email protected]>
    Signed-off-by: Andrew Morton <[email protected]>
    Signed-off-by: Linus Torvalds <[email protected]>
---
 lib/test_bitmap.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index de7ef2996a07..9734af711816 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -105,6 +105,35 @@ __check_eq_u32_array(const char *srcfile, unsigned int line,
 #define expect_eq_pbl(...)		__expect_eq(pbl, ##__VA_ARGS__)
 #define expect_eq_u32_array(...)	__expect_eq(u32_array, ##__VA_ARGS__)
 
+static void __init test_zero_clear(void)
+{
+	DECLARE_BITMAP(bmap, 1024);
+
+	/* Known way to set all bits */
+	memset(bmap, 0xff, 128);
+
+	expect_eq_pbl("0-22", bmap, 23);
+	expect_eq_pbl("0-1023", bmap, 1024);
+
+	/* single-word bitmaps */
+	bitmap_clear(bmap, 0, 9);
+	expect_eq_pbl("9-1023", bmap, 1024);
+
+	bitmap_zero(bmap, 35);
+	expect_eq_pbl("64-1023", bmap, 1024);
+
+	/* cross boundaries operations */
+	bitmap_clear(bmap, 79, 19);
+	expect_eq_pbl("64-78,98-1023", bmap, 1024);
+
+	bitmap_zero(bmap, 115);
+	expect_eq_pbl("128-1023", bmap, 1024);
+
+	/* Zeroing entire area */
+	bitmap_zero(bmap, 1024);
+	expect_eq_pbl("", bmap, 1024);
+}
+
 static void __init test_zero_fill_copy(void)
 {
 	DECLARE_BITMAP(bmap1, 1024);
@@ -309,6 +338,7 @@ static void noinline __init test_mem_optimisations(void)
 
 static int __init test_bitmap_init(void)
 {
+	test_zero_clear();
 	test_zero_fill_copy();
 	test_bitmap_arr32();
 	test_bitmap_parselist();
--
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