diff options
| author | Maxime Ripard <mripard@kernel.org> | 2024-05-27 11:08:31 +0200 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2024-05-27 11:08:31 +0200 |
| commit | 375c4d1583948cf2439833e4a85d5a0aee853895 (patch) | |
| tree | 821f494e7df09af36887f710cfce1fb89600e666 /lib/test_bitops.c | |
| parent | 983095eaf6c161ef73d96152bfc1a99ca051cd57 (diff) | |
| parent | 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 (diff) | |
Merge drm/drm-next into drm-misc-next
Let's start the new release cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'lib/test_bitops.c')
| -rw-r--r-- | lib/test_bitops.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/test_bitops.c b/lib/test_bitops.c index 3b7bcbee84db..55669624bb28 100644 --- a/lib/test_bitops.c +++ b/lib/test_bitops.c @@ -5,9 +5,11 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/cleanup.h> #include <linux/init.h> #include <linux/module.h> #include <linux/printk.h> +#include <linux/slab.h> /* a tiny module only meant to test * @@ -50,6 +52,30 @@ static unsigned long order_comb_long[][2] = { }; #endif +static int __init test_fns(void) +{ + static volatile __always_used unsigned long tmp __initdata; + unsigned long *buf __free(kfree) = NULL; + unsigned int i, n; + ktime_t time; + + buf = kmalloc_array(10000, sizeof(unsigned long), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + get_random_bytes(buf, 10000 * sizeof(unsigned long)); + time = ktime_get(); + + for (n = 0; n < BITS_PER_LONG; n++) + for (i = 0; i < 10000; i++) + tmp = fns(buf[i], n); + + time = ktime_get() - time; + pr_err("fns: %18llu ns\n", time); + + return 0; +} + static int __init test_bitops_startup(void) { int i, bit_set; @@ -94,6 +120,8 @@ static int __init test_bitops_startup(void) if (bit_set != BITOPS_LAST) pr_err("ERROR: FOUND SET BIT %d\n", bit_set); + test_fns(); + pr_info("Completed bitops test\n"); return 0; |