On Wed, Mar 06, 2019 at 10:09:28AM -0800, Linus Torvalds wrote: > On Wed, Mar 6, 2019 at 7:34 AM Arnd Bergmann <a...@arndb.de> wrote: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git > > tags/armsoc-drivers > > This caused a surprising number of kernel file rebuilds for me, and > the reason was > > > include/linux/mod_devicetable.h | 9 + > > It turns out that the above is indirectly included from a _lot_ of > code device header files. > > The reason seems to be the various 'struct *_device_id' declarations, > that then all the different header files want. > > So a tiny change in an oddball header file causes a lot of recompiles. > > Oh well. I don't know if there is anything to be done, but I did react > to how some surprising changes cause a lot of build activity, and it's > not always obvious.
Would it be worth splitting up mod_devicetable.h and having drivers include just the bus-specific device table header(s) that the driver requires? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
