Messages in this thread Patch in this message | | | Date | Wed, 3 Jun 2020 12:18:02 +0300 | From | Andy Shevchenko <> | Subject | Re: [Patch v2] lib: test get_count_order/long in test_bitops.c |
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On Tue, Jun 02, 2020 at 10:37:28PM +0000, Wei Yang wrote: > Add some test for get_count_order/long in test_bitops.c.
Thanks! LGTM, Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Note, we can have as many MODULE_AUTHOR() lines as we want.
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com> > > --- > 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 <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"); > -- > 2.23.0 >
-- With Best Regards, Andy Shevchenko
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