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| author | David Riley <davidriley@chromium.org> | 2014-06-16 14:58:32 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-07-23 10:16:35 -0700 |
| commit | e704f93af5a083c07b8f722672d63a1d908daf55 (patch) | |
| tree | 0a50758b433101ad3616726c6b9fd29c6943301a /lib/Kconfig.debug | |
| parent | 1af447bd8cbfb808a320885d214555fb2d32e6e6 (diff) | |
| download | lwn-e704f93af5a083c07b8f722672d63a1d908daf55.tar.gz lwn-e704f93af5a083c07b8f722672d63a1d908daf55.zip | |
kernel: time: Add udelay_test module to validate udelay
Create a module that allows udelay() to be executed to ensure that
it is delaying at least as long as requested (with a little bit of
error allowed).
There are some configurations which don't have reliably udelay
due to using a loop delay with cpufreq changes which should use
a counter time based delay instead. This test aims to identify
those configurations where timing is unreliable.
Signed-off-by: David Riley <davidriley@chromium.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7a638aa3545b..24a26ad5c99d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1649,6 +1649,15 @@ config TEST_BPF If unsure, say N. +config TEST_UDELAY + tristate "udelay test driver" + default n + help + This builds the "udelay_test" module that helps to make sure + that udelay() is working properly. + + If unsure, say N. + source "samples/Kconfig" source "lib/Kconfig.kgdb" |