:orphan:

.. title:: SWAP_NONATOMIC

.. option:: CONFIG_SWAP_NONATOMIC

*(No prompt -- not directly user assignable.)*

Type: ``bool``

Help
====

On some architectures, the _Swap() primitive cannot be made
atomic with respect to the irq_lock being released.  That
is, interrupts may be received between the entry to _Swap
and the completion of the context switch.  There are a
handful of workaround cases in the kernel that need to be
enabled when this is true.  Currently, this only happens on
ARM when the PendSV exception priority sits below that of
Zephyr-handled interrupts.

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols that select this symbol
===============================

- \ :option:`CPU_CORTEX_M <CONFIG_CPU_CORTEX_M>`

Kconfig definition
==================

.. highlight:: kconfig

At ``kernel/Kconfig:527``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:30``

Menu path: (Top) → General Kernel Options

.. parsed-literal::

    config SWAP_NONATOMIC
    	bool
    	help
    	  On some architectures, the _Swap() primitive cannot be made
    	  atomic with respect to the irq_lock being released.  That
    	  is, interrupts may be received between the entry to _Swap
    	  and the completion of the context switch.  There are a
    	  handful of workaround cases in the kernel that need to be
    	  enabled when this is true.  Currently, this only happens on
    	  ARM when the PendSV exception priority sits below that of
    	  Zephyr-handled interrupts.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*