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6f47c1e987
[ Upstream commit fa555b5026d0bf1ba7c9e645ff75e2725a982631 ]
Kbuild does not support having a source file compiled multiple times
and linked into distinct modules, or built-in and modular at the
same time. For fs-edma, there are two common components that are
linked into the fsl-edma.ko for Arm and PowerPC, plus the mcf-edma.ko
module on Coldfire. This violates the rule for compile-testing:
scripts/Makefile.build:236: drivers/dma/Makefile: fsl-edma-common.o is added to multiple modules: fsl-edma mcf-edma
scripts/Makefile.build:236: drivers/dma/Makefile: fsl-edma-trace.o is added to multiple modules: fsl-edma mcf-edma
I tried splitting out the common parts into a separate modules, but
that adds back the complexity that a cleanup patch removed, and it
gets harder with the addition of the tracepoints.
As a minimal workaround, address it at the Kconfig level, by disallowing
the broken configurations.
Link: https://lore.kernel.org/lkml/20240110232255.1099757-1-arnd@kernel.org/
Fixes: 66aac8ea0a ("dmaengine: fsl-edma: clean up EXPORT_SYMBOL_GPL in fsl-edma-common.c")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240528115440.2965975-1-arnd@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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.
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.