[PATCH] log: Allow LOG_DEBUG to always enable log output

[Tom Rini]

On Sun, Jul 26, 2020 at 08:27:35PM -0600, Simon Glass wrote:

> At present if CONFIG_LOG enabled, putting LOG_DEBUG at the top of a file
> (before log.h inclusion) causes _log() to be executed for every log()
> call, regardless of the build- or run-time logging level.
> 
> However there is no guarantee that the log record will actually be
> displayed. If the current log level is lower than LOGL_DEBUG then it will
> not be.
> 
> Add a way to signal that the log record should always be displayed and
> update log_passes_filters() to handle this.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

This exposes an underlying problem with LOG and clang I believe:
https://gitlab.denx.de/u-boot/u-boot/-/jobs/135789

-- 
Tom
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