Messages in this thread Patch in this message | | | From | Wei Yang <> | Subject | [PATCH] lib: make a test module with get_count_order/long | Date | Sat, 30 May 2020 00:43:28 +0000 |
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A test module to make sure get_count_order/long returns the correct result.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com> --- lib/Kconfig.debug | 13 ++++++ lib/Makefile | 2 + lib/test_getorder.c | 64 ++++++++++++++++++++++++++++++ tools/testing/selftests/lib/config | 1 + 4 files changed, 80 insertions(+) create mode 100644 lib/test_getorder.c
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c0ef216bb803..01e671151f42 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1999,6 +1999,19 @@ config TEST_BITOPS If unsure, say N. +config TEST_GETORDER + tristate "Test module for compilation of get_count_order operations" + depends on m + help + This builds the "test_getorder" module that is much like the + TEST_LKM module except that it does a basic exercise of the + get_count_order 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_getorder. + + If unsure, say N. + config TEST_VMALLOC tristate "Test module for stress/performance analysis of vmalloc allocator" default n diff --git a/lib/Makefile b/lib/Makefile index 0d942f7c7478..806d4df8f7c7 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -81,6 +81,8 @@ obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o obj-$(CONFIG_TEST_BITOPS) += test_bitops.o CFLAGS_test_bitops.o += -Werror +obj-$(CONFIG_TEST_GETORDER) += test_getorder.o +CFLAGS_test_getorder.o += -Werror obj-$(CONFIG_TEST_PRINTF) += test_printf.o obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o diff --git a/lib/test_getorder.c b/lib/test_getorder.c new file mode 100644 index 000000000000..6492abc793af --- /dev/null +++ b/lib/test_getorder.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Author: Wei Yang <richard.weiyang@gmail.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/printk.h> + +/* a tiny module only meant to test get_count_order/long */ +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_getorder_startup(void) +{ + int i; + + pr_warn("Loaded test module\n"); + 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; +} + +static void __exit test_getorder_unstartup(void) +{ + pr_warn("Unloaded test module\n"); +} + +module_init(test_getorder_startup); +module_exit(test_getorder_unstartup); + +MODULE_AUTHOR("Wei Yang <richard.weiyang@gmail.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("get_count_order/long testing module"); diff --git a/tools/testing/selftests/lib/config b/tools/testing/selftests/lib/config index b80ee3f6e265..2ad467d34648 100644 --- a/tools/testing/selftests/lib/config +++ b/tools/testing/selftests/lib/config @@ -3,3 +3,4 @@ CONFIG_TEST_BITMAP=m CONFIG_PRIME_NUMBERS=m CONFIG_TEST_STRSCPY=m CONFIG_TEST_BITOPS=m +CONFIG_TEST_GETORDER=m -- 2.23.0
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