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    Subjectrunning my kernel scanning scripts on your favourite part of the tree

    not sure when i'll get the time to do another pass over the kernel
    source tree with my kernel cleanup scripts but anyone who's
    interested is welcome to download the scripts from here:

    http://www.crashcourse.ca/wiki/index.php/Kernel_cleanup_scripts

    to check out whatever part of the tree they want.

    as a simple example, i can run the script to find "badref" config
    variables on, say, the drivers/mtd part of the tree:

    $ ../s/find_badref_configs.sh drivers/mtd
    >>>>> MTD_SUPERH_RESERVE
    drivers/mtd/maps/solutionengine.c:38:#ifdef CONFIG_MTD_SUPERH_RESERVE
    drivers/mtd/maps/solutionengine.c:44: .size = CONFIG_MTD_SUPERH_RESERVE,
    drivers/mtd/maps/solutionengine.c:54:#endif /* CONFIG_MTD_SUPERH_RESERVE */
    drivers/mtd/maps/solutionengine.c:97:#ifdef CONFIG_MTD_SUPERH_RESERVE
    drivers/mtd/maps/solutionengine.c:100: CONFIG_MTD_SUPERH_RESERVE);
    drivers/mtd/maps/solutionengine.c:104:#endif /* CONFIG_MTD_SUPERH_RESERVE */
    $

    that tells me that, under drivers/mtd, there's some file that
    insists on testing CONFIG_MTD_SUPERH_RESERVE even though no Kconfig
    file defines such a variable.

    the other common check is to look for the exact opposite --
    variables defined in a Kconfig file that are never tested anywhere.
    once again, let's pick on drivers/mtd:

    $ ../s/find_unused_configs.sh drivers/mtd
    ===== MTD_NAND_ATMEL_ECC_SOFT
    drivers/mtd/nand/Kconfig:375:config MTD_NAND_ATMEL_ECC_SOFT
    $

    that should be self-explanatory. anyway, have at it if it interests
    you.

    rday


    --

    ========================================================================
    Robert P. J. Day Waterloo, Ontario, CANADA
    http://crashcourse.ca

    Twitter: http://twitter.com/rpjday
    LinkedIn: http://ca.linkedin.com/in/rpjday
    ========================================================================


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