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The NAND ECC core is included in the generic NAND core when it is compiled in. Different software ECC engines drivers will select the NAND ECC core and thus also have a dependency on the NAND core. Using a "depends on" between the two leads to possible cases (not real cases, but created by robots) where one is still unselected because of the "select does not verifies depends on" game: WARNING: unmet direct dependencies detected for MTD_NAND_ECC Depends on [n]: MTD [=m] && MTD_NAND_CORE [=n] Selected by [m]: - MTD_NAND_ECC_SW_HAMMING [=y] && MTD [=m] - MTD_NAND_ECC_SW_BCH [=y] && MTD [=m] Fix this by using a select instead. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Link: https://lore.kernel.org/linux-mtd/20201113123945.32592-1-miquel.raynal@bootlin.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.
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.