:orphan:

.. title:: PRINTK_SYNC

.. option:: CONFIG_PRINTK_SYNC

*Serialize printk() calls*

Type: ``bool``

Help
====

When true, a spinlock will be taken around the output from a
single printk() call, preventing the output data from
interleaving with concurrent usage from another CPU or an
preempting interrupt.

Default
=======

- y if \ :option:`SMP <CONFIG_SMP>` && \ :option:`MP_NUM_CPUS <CONFIG_MP_NUM_CPUS>` > 1

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

.. highlight:: kconfig

At ``lib/os/Kconfig:64``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:33`` → ``lib/Kconfig:16``

Menu path: (Top) → Additional libraries → OS Support Library

.. parsed-literal::

    config PRINTK_SYNC
    	bool "Serialize printk() calls"
    	default y if \ :option:`SMP <CONFIG_SMP>` && \ :option:`MP_NUM_CPUS <CONFIG_MP_NUM_CPUS>` > 1
    	help
    	  When true, a spinlock will be taken around the output from a
    	  single printk() call, preventing the output data from
    	  interleaving with concurrent usage from another CPU or an
    	  preempting interrupt.

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