diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-12-22 14:45:14 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-12-27 12:30:56 +0100 |
| commit | cf4a7207b1cb4a3c3fe3aa11a83c9d673722a7f5 (patch) | |
| tree | 664430c374186b63e808e08f65bca635747e14c9 /tools/testing/selftests/lib | |
| parent | b3ee963fe41d0034cf8b6aff1f0cc9c91bf8d478 (diff) | |
lib: Add a simple prime number generator
Prime numbers are interesting for testing components that use multiplies
and divides, such as testing DRM's struct drm_mm alignment computations.
v2: Move to lib/, add selftest
v3: Fix initial constants (exclude 0/1 from being primes)
v4: More RCU markup to keep 0day/sparse happy
v5: Fix RCU unwind on module exit, add to kselftests
v6: Tidy computation of bitmap size
v7: for_each_prime_number_from()
v8: Compose small-primes using BIT() for easier verification
v9: Move rcu dance entirely into callers.
v10: Improve quote for Betrand's Postulate (aka Chebyshev's theorem)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161222144514.3911-1-chris@chris-wilson.co.uk
Diffstat (limited to 'tools/testing/selftests/lib')
| -rwxr-xr-x | tools/testing/selftests/lib/prime_numbers.sh | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/testing/selftests/lib/prime_numbers.sh b/tools/testing/selftests/lib/prime_numbers.sh new file mode 100755 index 000000000000..da4cbcd766f5 --- /dev/null +++ b/tools/testing/selftests/lib/prime_numbers.sh @@ -0,0 +1,15 @@ +#!/bin/sh +# Checks fast/slow prime_number generation for inconsistencies + +if ! /sbin/modprobe -q -r prime_numbers; then + echo "prime_numbers: [SKIP]" + exit 77 +fi + +if /sbin/modprobe -q prime_numbers selftest=65536; then + /sbin/modprobe -q -r prime_numbers + echo "prime_numbers: ok" +else + echo "prime_numbers: [FAIL]" + exit 1 +fi |