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Message-ID: <503787D5.7040401@gmail.com> Date: Fri, 24 Aug 2012 08:55:33 -0500 From: Rob Herring <robherring2@...il.com> To: Arnd Bergmann <arnd@...db.de> CC: linux-arm-kernel@...ts.infradead.org, linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 0/4] [RFC] ARM: multiplatform: rename all mach headers On 08/22/2012 07:53 AM, Arnd Bergmann wrote: > I've created this series some time ago, and updated it now to > v3.6-rc1. The idea is to get us a big step closer to the > single zImage kernel across multiple ARM platforms by > untangling the duplicate header file names. > > There are two branches available in the arm-soc tree: > > 1. This series, > http://git.kernel.org/?p=linux/kernel/git/arm/arm-soc.git;a=shortlog;h=refs/heads/testing/mach-headers > This just moves header files around and changes most of the > files including them. There are a few remaining drivers > and platform files that keep including a generic file name > like <mach/uncompress.h>. It remains possible to do that, > and I've run extensive tests to ensure I did not break > anything with this. However, each of these instances means > that there is something that stops working when you get to > the real multiplatform kernel and we still need to deal > with them one by one. > > 2. Actually enabling CONFIG_ARCH_MULTIPLATFORM > http://git.kernel.org/?p=linux/kernel/git/arm/arm-soc.git;a=shortlog;h=refs/heads/testing/multiplatform > This builds on top of the first series, but is much more > experimental. It shows how a multiplatform kernel can look > like, by allowing to build vexpress, ux500, imx and omap2 > together in one kernel, but at the same time breaking some of > their features. Can't we treat these as independent problems? The mach headers are a problem for enabling some (most) platforms, but strictly speaking are not a blocker for enabling multi-platform builds. I successfully built highbank and vexpress without all this header renaming. This did require pushing the mach/plat include path down into the mach directory for vexpress adding this to its Makefile: ccflags-y := -I$(srctree)/$(src)/include -I$(srctree)/arch/arm/plat-versatile/include Any new DT only platforms probably don't even need this. I think fixing the headers by adding mach names doesn't force further clean-up of drivers. I suspect there are still drivers which get their irq number from an include rather than a resource for example. A quarter of the 600 something includes are hardware.h which pulls in anything and everything. I removed them and did a build. At least with pxa, there's only a handful of errors and nearly all where on cpu_is_X not being defined. This is something we should implement in a standardized way or figure out how to remove. Rob > I would like to get the first series merged in v3.7 if we can agree > on the general approach. So far, feedback in Linaro internal > meetings has been very positive, but Russell had concerns when > we first discussed it a few months ago. > > A patch set this large means a lot of churn, and there are a few > ways we could deal with this: > > a) Put the branch into linux-next now, and have everyone who > encounters conflicts pull it into their own branch to resolve > the conflicts. This can be a lot of work, and it means we > cannot rebase this branch any more. > > b) Involve Linus Torvalds in the process and get him to > take the series at the end of the v3.7 merge window, after > rebasing it on top of all the other branches he merged. > This means it happens pretty much ad-hoc and there is little > testing on the patches that actually get merged. > > c) Split the series and submit the first two branches at > the start of the merge window, and do the changes to all > the drivers either at the end of the v3.7 merge window > (after rebasing) or merge them through the subsystem > maintainer trees in small chunks for v3.8. This can minimize > the problems of the other two approaches, but means the process > takes longer to get to the same result. > > Arnd > > [second attempt to send these patches, the first one was rejected by > lists.infradead.org, this one uses a different smtp setup] > > Arnd Bergmann (4): > [RFC] ARM: autogenerate mach-foo/* and plat-foo/* header redirects > [RFC] ARM: mass move of mach-*/plat-* header files > [RFC] ARM: treewide: scripted conversion to mach-*/*.h > [RFC] ARM: treewide: manually change more mach-*/*.h includes > > 0.0% Documentation/spi/ > 0.0% arch/arm/boot/compressed/ > 2.0% arch/arm/mach-at91/include/mach-at91/ > 2.0% arch/arm/mach-at91/include/mach/ > 0.1% arch/arm/mach-at91/ > 0.0% arch/arm/mach-bcmring/csp/chipc/ > 0.0% arch/arm/mach-bcmring/csp/dmac/ > 0.0% arch/arm/mach-bcmring/csp/tmr/ > 0.0% arch/arm/mach-bcmring/include/csp/ > 3.0% arch/arm/mach-bcmring/include/mach-bcmring/csp/ > 0.6% arch/arm/mach-bcmring/include/mach-bcmring/ > 3.0% arch/arm/mach-bcmring/include/mach/csp/ > 0.6% arch/arm/mach-bcmring/include/mach/ > 0.0% arch/arm/mach-bcmring/ > 0.3% arch/arm/mach-clps711x/include/mach-clps711x/ > 0.3% arch/arm/mach-clps711x/include/mach/ > 0.0% arch/arm/mach-clps711x/ > 0.3% arch/arm/mach-cns3xxx/include/mach-cns3xxx/ > 0.3% arch/arm/mach-cns3xxx/include/mach/ > 0.0% arch/arm/mach-cns3xxx/ > 1.2% arch/arm/mach-davinci/include/mach-davinci/ > 1.2% arch/arm/mach-davinci/include/mach/ > 0.1% arch/arm/mach-davinci/ > 0.1% arch/arm/mach-dove/include/mach-dove/ > 0.1% arch/arm/mach-dove/include/mach/ > 0.0% arch/arm/mach-dove/ > 0.0% arch/arm/mach-ebsa110/include/mach-ebsa110/ > 0.0% arch/arm/mach-ebsa110/include/mach/ > 0.0% arch/arm/mach-ebsa110/ > 0.2% arch/arm/mach-ep93xx/include/mach-ep93xx/ > 0.2% arch/arm/mach-ep93xx/include/mach/ > 0.0% arch/arm/mach-ep93xx/ > 1.0% arch/arm/mach-exynos/include/mach-exynos/ > 1.0% arch/arm/mach-exynos/include/mach/ > 0.1% arch/arm/mach-exynos/ > 0.1% arch/arm/mach-footbridge/include/mach-footbridge/ > 0.1% arch/arm/mach-footbridge/include/mach/ > 0.0% arch/arm/mach-footbridge/ > 0.1% arch/arm/mach-gemini/include/mach-gemini/ > 0.1% arch/arm/mach-gemini/include/mach/ > 0.0% arch/arm/mach-gemini/ > 0.2% arch/arm/mach-h720x/include/mach-h720x/ > 0.2% arch/arm/mach-h720x/include/mach/ > 0.0% arch/arm/mach-h720x/ > 0.0% arch/arm/mach-highbank/include/mach-highbank/ > 0.0% arch/arm/mach-highbank/include/mach/ > 7.2% arch/arm/mach-imx/include/mach-imx/ > 0.0% arch/arm/mach-imx/include/mach/ > 0.1% arch/arm/mach-imx/ > 0.3% arch/arm/mach-integrator/include/mach-integrator/ > 0.3% arch/arm/mach-integrator/include/mach/ > 0.0% arch/arm/mach-integrator/ > 0.6% arch/arm/mach-iop13xx/include/mach-iop13xx/ > 0.6% arch/arm/mach-iop13xx/include/mach/ > 0.0% arch/arm/mach-iop13xx/ > 0.0% arch/arm/mach-iop32x/include/mach-iop32x/ > 0.0% arch/arm/mach-iop32x/include/mach/ > 0.0% arch/arm/mach-iop32x/ > 0.0% arch/arm/mach-iop33x/include/mach-iop33x/ > 0.0% arch/arm/mach-iop33x/include/mach/ > 0.0% arch/arm/mach-iop33x/ > 0.7% arch/arm/mach-ixp4xx/include/mach-ixp4xx/ > 0.7% arch/arm/mach-ixp4xx/include/mach/ > 0.0% arch/arm/mach-ixp4xx/ > 0.1% arch/arm/mach-kirkwood/include/mach-kirkwood/ > 0.1% arch/arm/mach-kirkwood/include/mach/ > 0.0% arch/arm/mach-kirkwood/ > 0.4% arch/arm/mach-ks8695/include/mach-ks8695/ > 0.4% arch/arm/mach-ks8695/include/mach/ > 0.0% arch/arm/mach-ks8695/ > 0.0% arch/arm/mach-l7200/include/mach-l7200/ > 0.0% arch/arm/mach-l7200/include/mach/ > 0.4% arch/arm/mach-lpc32xx/include/mach-lpc32xx/ > 0.4% arch/arm/mach-lpc32xx/include/mach/ > 0.0% arch/arm/mach-lpc32xx/ > 1.0% arch/arm/mach-mmp/include/mach-mmp/ > 1.0% arch/arm/mach-mmp/include/mach/ > 0.0% arch/arm/mach-mmp/ > 1.9% arch/arm/mach-msm/include/mach-msm/ > 1.9% arch/arm/mach-msm/include/mach/ > 0.0% arch/arm/mach-msm/ > 0.1% arch/arm/mach-mv78xx0/include/mach-mv78xx0/ > 0.1% arch/arm/mach-mv78xx0/include/mach/ > 0.0% arch/arm/mach-mv78xx0/ > 0.0% arch/arm/mach-mvebu/include/mach-mvebu/ > 0.0% arch/arm/mach-mvebu/include/mach/ > 0.0% arch/arm/mach-mvebu/ > 0.0% arch/arm/mach-mxs/devices/ > 1.1% arch/arm/mach-mxs/include/mach-mxs/ > 1.1% arch/arm/mach-mxs/include/mach/ > 0.0% arch/arm/mach-mxs/ > 0.3% arch/arm/mach-netx/include/mach-netx/ > 0.3% arch/arm/mach-netx/include/mach/ > 0.0% arch/arm/mach-netx/ > 0.1% arch/arm/mach-nomadik/include/mach-nomadik/ > 0.1% arch/arm/mach-nomadik/include/mach/ > 0.0% arch/arm/mach-nomadik/ > 0.2% arch/arm/mach-omap1/include/mach-omap1/ > 0.2% arch/arm/mach-omap1/include/mach/ > 0.1% arch/arm/mach-omap1/ > 1.2% arch/arm/mach-omap2/include/mach-omap2/ > 1.2% arch/arm/mach-omap2/include/mach/ > 0.3% arch/arm/mach-omap2/ > 0.1% arch/arm/mach-orion5x/include/mach-orion5x/ > 0.1% arch/arm/mach-orion5x/include/mach/ > 0.0% arch/arm/mach-orion5x/ > 0.0% arch/arm/mach-picoxcell/include/mach-picoxcell/ > 0.0% arch/arm/mach-picoxcell/include/mach/ > 0.0% arch/arm/mach-picoxcell/ > 0.4% arch/arm/mach-pnx4008/include/mach-pnx4008/ > 0.4% arch/arm/mach-pnx4008/include/mach/ > 0.0% arch/arm/mach-pnx4008/ > 0.0% arch/arm/mach-prima2/include/mach-prima2/ > 0.0% arch/arm/mach-prima2/include/mach/ > 0.0% arch/arm/mach-prima2/ > 4.0% arch/arm/mach-pxa/include/mach-pxa/ > 4.0% arch/arm/mach-pxa/include/mach/ > 0.3% arch/arm/mach-pxa/ > 0.7% arch/arm/mach-realview/include/mach-realview/ > 0.7% arch/arm/mach-realview/include/mach/ > 0.0% arch/arm/mach-realview/ > 0.1% arch/arm/mach-rpc/include/mach-rpc/ > 0.1% arch/arm/mach-rpc/include/mach/ > 0.0% arch/arm/mach-rpc/ > 0.0% arch/arm/mach-s3c2410/ > 0.0% arch/arm/mach-s3c2412/ > 0.0% arch/arm/mach-s3c2440/ > 1.4% arch/arm/mach-s3c24xx/include/mach-s3c24xx/ > 1.4% arch/arm/mach-s3c24xx/include/mach/ > 0.4% arch/arm/mach-s3c24xx/ > 0.5% arch/arm/mach-s3c64xx/include/mach-s3c64xx/ > 0.5% arch/arm/mach-s3c64xx/include/mach/ > 0.1% arch/arm/mach-s3c64xx/ > 0.3% arch/arm/mach-s5p64x0/include/mach-s5p64x0/ > 0.3% arch/arm/mach-s5p64x0/include/mach/ > 0.0% arch/arm/mach-s5p64x0/ > 0.2% arch/arm/mach-s5pc100/include/mach-s5pc100/ > 0.2% arch/arm/mach-s5pc100/include/mach/ > 0.0% arch/arm/mach-s5pc100/ > 0.3% arch/arm/mach-s5pv210/include/mach-s5pv210/ > 0.3% arch/arm/mach-s5pv210/include/mach/ > 0.0% arch/arm/mach-s5pv210/ > 1.9% arch/arm/mach-sa1100/include/mach-sa1100/ > 1.9% arch/arm/mach-sa1100/include/mach/ > 0.0% arch/arm/mach-sa1100/ > 0.0% arch/arm/mach-shark/include/mach-shark/ > 0.0% arch/arm/mach-shark/include/mach/ > 1.5% arch/arm/mach-shmobile/include/mach-shmobile/ > 1.5% arch/arm/mach-shmobile/include/mach/ > 0.0% arch/arm/mach-shmobile/ > 0.0% arch/arm/mach-socfpga/include/mach-socfpga/ > 0.0% arch/arm/mach-socfpga/include/mach/ > 0.1% arch/arm/mach-spear13xx/include/mach-spear13xx/ > 0.1% arch/arm/mach-spear13xx/include/mach/ > 0.0% arch/arm/mach-spear13xx/ > 0.0% arch/arm/mach-spear3xx/include/mach-spear3xx/ > 0.0% arch/arm/mach-spear3xx/include/mach/ > 0.0% arch/arm/mach-spear3xx/ > 0.0% arch/arm/mach-spear6xx/include/mach-spear6xx/ > 0.0% arch/arm/mach-spear6xx/include/mach/ > 0.0% arch/arm/mach-spear6xx/ > 0.5% arch/arm/mach-tegra/include/mach-tegra/ > 0.5% arch/arm/mach-tegra/include/mach/ > 0.0% arch/arm/mach-tegra/ > 0.5% arch/arm/mach-u300/include/mach-u300/ > 0.5% arch/arm/mach-u300/include/mach/ > 0.0% arch/arm/mach-u300/ > 0.3% arch/arm/mach-ux500/include/mach-ux500/ > 0.3% arch/arm/mach-ux500/include/mach/ > 0.0% arch/arm/mach-ux500/ > 0.3% arch/arm/mach-versatile/include/mach-versatile/ > 0.3% arch/arm/mach-versatile/include/mach/ > 0.0% arch/arm/mach-versatile/ > 0.1% arch/arm/mach-vexpress/include/mach-vexpress/ > 0.1% arch/arm/mach-vexpress/include/mach/ > 0.0% arch/arm/mach-vexpress/ > 0.2% arch/arm/mach-vt8500/include/mach-vt8500/ > 0.2% arch/arm/mach-vt8500/include/mach/ > 0.0% arch/arm/mach-vt8500/ > 0.3% arch/arm/mach-w90x900/include/mach-w90x900/ > 0.3% arch/arm/mach-w90x900/include/mach/ > 0.0% arch/arm/mach-w90x900/ > 0.0% arch/arm/mach-zynq/include/mach-zynq/ > 0.0% arch/arm/mach-zynq/include/mach/ > 0.0% arch/arm/mach-zynq/ > 0.0% arch/arm/mm/ > 0.0% arch/arm/plat-mxc/devices/ > 7.2% arch/arm/plat-mxc/include/mach/ > 0.0% arch/arm/plat-mxc/ > 0.1% arch/arm/plat-nomadik/include/plat-nomadik/ > 0.1% arch/arm/plat-nomadik/include/plat/ > 3.4% arch/arm/plat-omap/include/plat-omap/ > 3.4% arch/arm/plat-omap/include/plat/ > 0.0% arch/arm/plat-omap/ > 0.1% arch/arm/plat-orion/include/plat-orion/ > 0.1% arch/arm/plat-orion/include/plat/ > 0.0% arch/arm/plat-orion/ > 0.2% arch/arm/plat-pxa/include/plat-pxa/ > 0.2% arch/arm/plat-pxa/include/plat/ > 0.0% arch/arm/plat-pxa/ > 0.0% arch/arm/plat-s3c24xx/ > 2.7% arch/arm/plat-samsung/include/plat-samsung/ > 2.7% arch/arm/plat-samsung/include/plat/ > 0.0% arch/arm/plat-samsung/ > 0.1% arch/arm/plat-spear/include/plat-spear/ > 0.1% arch/arm/plat-spear/include/plat/ > 0.0% arch/arm/plat-spear/ > 0.0% arch/arm/plat-versatile/include/plat-versatile/ > 0.0% arch/arm/plat-versatile/include/plat/ > 0.0% arch/arm/plat-versatile/ > 0.0% arch/arm/tools/ > 0.0% arch/arm/ > 0.0% drivers/ata/ > 0.0% drivers/char/hw_random/ > 0.0% drivers/char/ > 0.0% drivers/clk/mxs/ > 0.0% drivers/clk/ > 0.0% drivers/clocksource/ > 0.0% drivers/cpufreq/ > 0.0% drivers/crypto/ux500/cryp/ > 0.0% drivers/crypto/ux500/hash/ > 0.0% drivers/crypto/ > 0.0% drivers/devfreq/ > 0.0% drivers/dma/ipu/ > 0.0% drivers/dma/ > 0.0% drivers/gpio/ > 0.0% drivers/gpu/drm/exynos/ > 0.0% drivers/hwmon/ > 0.0% drivers/i2c/busses/ > 0.0% drivers/iio/adc/ > 0.0% drivers/input/keyboard/ > 0.0% drivers/input/misc/ > 0.0% drivers/input/mouse/ > 0.0% drivers/input/serio/ > 0.0% drivers/input/touchscreen/ > 0.0% drivers/iommu/ > 0.0% drivers/leds/ > 0.0% drivers/media/video/davinci/ > 0.0% drivers/media/video/omap/ > 0.0% drivers/media/video/omap3isp/ > 0.0% drivers/media/video/s5p-fimc/ > 0.0% drivers/media/video/s5p-tv/ > 0.0% drivers/media/video/ > 0.0% drivers/mfd/ > 0.0% drivers/misc/ > 0.0% drivers/mmc/host/ > 0.0% drivers/mtd/maps/ > 0.0% drivers/mtd/nand/ > 0.0% drivers/mtd/onenand/ > 0.0% drivers/net/can/ > 0.0% drivers/net/ethernet/amd/ > 0.0% drivers/net/ethernet/cadence/ > 0.0% drivers/net/ethernet/cirrus/ > 0.0% drivers/net/ethernet/micrel/ > 0.0% drivers/net/ethernet/nxp/ > 0.0% drivers/net/ethernet/smsc/ > 0.0% drivers/net/ethernet/xscale/ > 0.0% drivers/net/ethernet/ > 0.0% drivers/net/irda/ > 0.0% drivers/net/wan/ > 0.0% drivers/pcmcia/ > 0.0% drivers/pinctrl/ > 0.0% drivers/power/avs/ > 0.0% drivers/power/ > 0.0% drivers/ptp/ > 0.0% drivers/pwm/ > 0.0% drivers/remoteproc/ > 0.0% drivers/rtc/ > 0.0% drivers/scsi/arm/ > 0.0% drivers/spi/ > 0.0% drivers/staging/nvec/ > 0.0% drivers/staging/omapdrm/ > 0.0% drivers/staging/ste_rmi4/ > 0.0% drivers/staging/tidspbridge/core/ > 0.0% drivers/staging/tidspbridge/include/dspbridge/ > 0.0% drivers/staging/tidspbridge/rmgr/ > 0.0% drivers/tty/serial/ > 0.0% drivers/uio/ > 0.0% drivers/usb/gadget/ > 0.0% drivers/usb/host/ > 0.0% drivers/usb/musb/ > 0.0% drivers/usb/otg/ > 0.0% drivers/video/backlight/ > 0.0% drivers/video/exynos/ > 0.0% drivers/video/msm/ > 0.0% drivers/video/omap/ > 0.0% drivers/video/omap2/dss/ > 0.0% drivers/video/omap2/omapfb/ > 0.0% drivers/video/omap2/ > 0.0% drivers/video/pnx4008/ > 0.0% drivers/video/ > 0.0% drivers/w1/masters/ > 0.0% drivers/watchdog/ > 0.0% include/linux/mfd/ > 0.0% include/linux/platform_data/ > 0.0% include/linux/power/ > 0.0% include/linux/spi/ > 0.0% include/linux/ > 0.0% sound/arm/ > 0.0% sound/atmel/ > 0.0% sound/oss/ > 0.0% sound/soc/atmel/ > 0.0% sound/soc/davinci/ > 0.0% sound/soc/ep93xx/ > 0.0% sound/soc/fsl/ > 0.0% sound/soc/kirkwood/ > 0.0% sound/soc/mxs/ > 0.0% sound/soc/nuc900/ > 0.0% sound/soc/omap/ > 0.0% sound/soc/pxa/ > 0.0% sound/soc/samsung/ > 0.0% sound/soc/tegra/ > 0.0% sound/soc/ux500/ > > > _______________________________________________ > linaro-kernel mailing list > linaro-kernel@...ts.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-kernel > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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