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kernel: sychronize irq_offload() access

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Entering irq_offload() on multiple CPUs can cause
difficult to debug/reproduce crashes. Demote irq_offload()
to non-inline (it never needed to be inline anyway) and
wrap the arch call in a semaphore.

Some tests which were unnecessarily killing threads
have been fixed; these threads exit by themselves anyway
and we won't leave the semaphore dangling.

The definition of z_arch_irq_offload() moved to
arch_interface.h as it only gets called by kernel C code.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-11-06 14:17:17 -08:00 • committed by Andrew Boie
commit e09a0255da
5 changed files with 16 additions and 14 deletions
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include/sys/arch_interface.h
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@ -31,6 +31,7 @@
#include <stddef.h>
#include <zephyr/types.h>
#include <arch/cpu.h>
#include <irq_offload.h>
#ifdef __cplusplus
extern "C" {