diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 10 | ||||
| -rw-r--r-- | lib/test_bitops.c | 53 |
2 files changed, 56 insertions, 7 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index cb98741601bd..5beec9c833ce 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2052,15 +2052,15 @@ 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..ced25e3a779b 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 { @@ -24,14 +28,59 @@ enum bitops_fun { static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH); +static unsigned int order_comb[][2] = { + {0x00000003, 2}, + {0x00000004, 2}, + {0x00001fff, 13}, + {0x00002000, 13}, + {0x50000000, 31}, + {0x80000000, 31}, + {0x80003000, 32}, +}; + +#ifdef CONFIG_64BIT +static unsigned long order_comb_long[][2] = { + {0x0000000300000000, 34}, + {0x0000000400000000, 34}, + {0x00001fff00000000, 45}, + {0x0000200000000000, 45}, + {0x5000000000000000, 63}, + {0x8000000000000000, 63}, + {0x8000300000000000, 64}, +}; +#endif + static int __init test_bitops_startup(void) { + int i; + pr_warn("Loaded test module\n"); set_bit(BITOPS_4, g_bitmap); set_bit(BITOPS_7, g_bitmap); 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); i++) { + if (order_comb[i][1] != get_count_order_long(order_comb[i][0])) + pr_warn("get_count_order_long wrong for %x\n", + order_comb[i][0]); + } + +#ifdef CONFIG_64BIT + 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]); + } +#endif return 0; } @@ -55,6 +104,6 @@ static void __exit test_bitops_unstartup(void) module_init(test_bitops_startup); module_exit(test_bitops_unstartup); -MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>"); +MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>, Wei Yang <richard.weiyang@gmail.com>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Bit testing module"); |