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authorBaolin Wang <baolin.wang@linaro.org>2018-01-29 10:22:51 +0800
committerJason Wessel <jason.wessel@windriver.com>2018-01-31 21:31:09 -0600
commit40b90efeae9be8702d387dbcbb3aadc57033d4db (patch)
tree08dd529110a106de84a75777b056134757e5b74f /kernel/debug/kdb/kdb_support.c
parent33f765f698895527acd69faf5d54ab07f02683ff (diff)
downloadlinux-40b90efeae9be8702d387dbcbb3aadc57033d4db.tar.gz
kdb: use ktime_get_mono_fast_ns() instead of ktime_get_ts()
The kdb code will print the monotonic time by ktime_get_ts(), but
the ktime_get_ts() will be protected by a sequence lock, that will
introduce one deadlock risk if the lock was already held in the
context from which we entered the debugger.

Thus we can use the ktime_get_mono_fast_ns() to get the monotonic
time, which is NMI safe access to clock monotonic. Moreover we can
remove the 'struct timespec', which is not y2038 safe.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'kernel/debug/kdb/kdb_support.c')
0 files changed, 0 insertions, 0 deletions