Masayuki Ishikawa c8a372702a sched/sched: SMP: Fix this_task() to be an atomic operation. In the previous implementation, this_task() was defined in sched.h by using just a macro current_task(this_cpu()). However, I found that this is not atomic and actually sometimes switching CPU happened in executing the macro when we tested audio steaming plus executing commands via telnet. This change resolves this issue by implementing atomic this_task()in sched_thistask.c which is newly introduced.		2018-02-04 16:59:09 -06:00
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include	armv7-a, armv7-r, armv7-m: Add atomic read-add-write and read-subtract-write functions.	2018-02-04 12:22:03 -06:00
src	sched/sched: SMP: Fix this_task() to be an atomic operation. In the previous implementation, this_task() was defined in sched.h by using just a macro current_task(this_cpu()). However, I found that this is not atomic and actually sometimes switching CPU happened in executing the macro when we tested audio steaming plus executing commands via telnet. This change resolves this issue by implementing atomic this_task()in sched_thistask.c which is newly introduced.	2018-02-04 16:59:09 -06:00
Kconfig	spin_lock_irqsave() and spin_unlock_irqrestore() are only valid if the CPU supports global disabling of interrupts.	2018-02-04 15:41:22 -06:00