On Wed, Jan 20, 2016 at 12:08 PM, Dan Williams <dan.j.willi...@intel.com> wrote: > On Wed, Jan 20, 2016 at 12:01 PM, Larry Finger > <larry.fin...@lwfinger.net> wrote: >> My PowerBook G4 Aluminum with a 32-bit PPC processor fails to boot for the >> 4.4-git series. The problem was bisected to commit 21266be. It took a while >> to figure out why a commit that only rearranges the Kconfig files could >> cause the problem. >> >> The answer came when I read the commit message for 90a545e98126 and saw that >> "Recompiling with CONFIG_IO_STRICT_DEVMEM=n" might be necessary. After I >> made that change, the system boots. >> >> If it is the graphics hardware driver at fault, the VGA controller is listed >> as an ATI RV350 [Mobility Radeon 9600 M10] with PCI ID 1002:4350. It uses >> radeon as the driver. >> >> I'm not sure if this is a bug in the configuration, but I know that >> selecting the default answer to all the new configuration parameters leaves >> me with a machine that is unbootable. > > I agree that the default configuration should remain bootable. I'll > send a change that does not force that default. > > Thanks for the report and sorry for the inconvenience.
Are you sure that the bisect is pointing to "21266be9ed54 arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug" and not "90a545e98126 restrict /dev/mem to idle io memory ranges"? The default for CONFIG_STRICT_DEVM should be unchanged in 21266be9ed54, it's not until 90a545e98126 that I would expect a behavior change.
