xtensa: allow arch-specific arch_spin_relax() with more NOPs #60601
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This adds a Kconfig to introduce the Xtensa specific arch_spin_relax() which can do more NOPs. Some Xtensa SoCs may need more NOPs after failure to lock a spinlock, especially under SMP. This gives the bus extra time to propagate the RCW transactions among CPUs. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
andyross
approved these changes
Jul 20, 2023
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Not that I know of. Stuff magically start working after introduction of |
nashif
approved these changes
Jul 20, 2023
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This adds a Kconfig to introduce the Xtensa specific arch_spin_relax() which can do more NOPs. Some Xtensa SoCs may need more NOPs after failure to lock a spinlock, especially under SMP. This gives the bus extra time to propagate the RCW transactions among CPUs.