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33e9572483
smp_processor_id() checks preemption if CONFIG_DEBUG_PREEMPT is enabled, causing a warning dump during boot: [ 5.042377] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1 [ 5.050281] caller is pwrdm_set_next_pwrst+0x48/0x88 [ 5.055330] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.14.24-g57341df0b4 #1 Use the raw_smp_processor_id() for the trace instead, this value does not need to be perfectly correct. The alternative of disabling preempt is too heavy weight operation to be applied in PM hot path for just tracing purposes. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.