After posting on_cpu() support yesterday I thought of some potential
issues.
1) cpu0 was the only cpu allowed to call on_cpus, and no cpu was
allowed to call on_cpu on cpu0 (as it'll never idle).
2) deadlocks are easy with this idle state scheduling model, but
also easy to detect, so we should.
v2:
- fix race in cpu_wait() by ordering set/check correctly
Andrew Jones (2):
arm/arm64: smp: cpu0 is special
arm/arm64: smp: add deadlock detection
lib/arm/asm/smp.h | 2 ++
lib/arm/smp.c | 46 ++++++++++++++++++++++++++++++++++++----------
2 files changed, 38 insertions(+), 10 deletions(-)
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2.9.4
