Add some test for get_count_order/long in test_bitops.c.
Signed-off-by: Wei Yang <[email protected]>
---
v2: merge the test into test_bitops.c
---
lib/Kconfig.debug | 10 +++++-----
lib/test_bitops.c | 40 ++++++++++++++++++++++++++++++++++++++--
2 files changed, 43 insertions(+), 7 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index f80d5609798f..512111a72e34 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1987,15 +1987,15 @@ config TEST_LKM
If unsure, say N.
config TEST_BITOPS
- tristate "Test module for compilation of clear_bit/set_bit operations"
+ tristate "Test module for compilation of bitops operations"
depends on m
help
This builds the "test_bitops" module that is much like the
TEST_LKM module except that it does a basic exercise of the
- clear_bit and set_bit macros to make sure there are no compiler
- warnings from C=1 sparse checker or -Wextra compilations. It has
- no dependencies and doesn't run or load unless explicitly requested
- by name. for example: modprobe test_bitops.
+ set/clear_bit macros and get_count_order/long to make sure there are
+ no compiler warnings from C=1 sparse checker or -Wextra
+ compilations. It has no dependencies and doesn't run or load unless
+ explicitly requested by name. for example: modprobe test_bitops.
If unsure, say N.
diff --git a/lib/test_bitops.c b/lib/test_bitops.c
index fd50b3ae4a14..702d5973a5b6 100644
--- a/lib/test_bitops.c
+++ b/lib/test_bitops.c
@@ -9,7 +9,11 @@
#include <linux/module.h>
#include <linux/printk.h>
-/* a tiny module only meant to test set/clear_bit */
+/* a tiny module only meant to test
+ *
+ * set/clear_bit
+ * get_count_order/long
+ */
/* use an enum because thats the most common BITMAP usage */
enum bitops_fun {
@@ -24,6 +28,26 @@ enum bitops_fun {
static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH);
+unsigned int order_comb[][2] = {
+ {0x00000003, 2},
+ {0x00000004, 2},
+ {0x00001fff, 13},
+ {0x00002000, 13},
+ {0x50000000, 31},
+ {0x80000000, 31},
+ {0x80003000, 32},
+};
+
+unsigned long order_comb_long[][2] = {
+ {0x0000000300000000, 34},
+ {0x0000000400000000, 34},
+ {0x00001fff00000000, 45},
+ {0x0000200000000000, 45},
+ {0x5000000000000000, 63},
+ {0x8000000000000000, 63},
+ {0x8000300000000000, 64},
+};
+
static int __init test_bitops_startup(void)
{
pr_warn("Loaded test module\n");
@@ -32,6 +56,18 @@ static int __init test_bitops_startup(void)
set_bit(BITOPS_11, g_bitmap);
set_bit(BITOPS_31, g_bitmap);
set_bit(BITOPS_88, g_bitmap);
+
+ for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
+ if (order_comb[i][1] != get_count_order(order_comb[i][0]))
+ pr_warn("get_count_order wrong for %x\n",
+ order_comb[i][0]); }
+
+ for (i = 0; i < ARRAY_SIZE(order_comb_long); i++) {
+ if (order_comb_long[i][1] !=
+ get_count_order_long(order_comb_long[i][0]))
+ pr_warn("get_count_order_long wrong for %lx\n",
+ order_comb_long[i][0]); }
+
return 0;
}
@@ -55,6 +91,6 @@ static void __exit test_bitops_unstartup(void)
module_init(test_bitops_startup);
module_exit(test_bitops_unstartup);
-MODULE_AUTHOR("Jesse Brandeburg <[email protected]>");
+MODULE_AUTHOR("Jesse Brandeburg <[email protected]>, Wei Yang
<[email protected]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Bit testing module");
--
2.23.0
