| Message ID | 1480691143-19845-1-git-send-email-vladimir.murzin@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Fri, Dec 02, 2016 at 03:05:18PM +0000, Vladimir Murzin wrote: > there was little interest to run A-class with MMU disabled (or > 1:1 MMU mapping) as well. With a few more changes, on a Cortex-A platform, Kernel reached maximum it can proceed w/o user space help, i.e. upto, "Kernel panic - not syncing: No working init found." Creating user space executables suitable for Cortex-A !MMU is the distance to reach prompt. Seems no !MMU A-class suitable toolchains are available, the existing !MMU toolchains available are for either M or R class. Looks like FDPIC one's also are so (cc'ing Maxime & Mickeal in case they have some input here). And compiling a suitable compiler failed. Let know if any signposts to travel the remaining distance. PS: Version used was v2 instead of this v3 series. Regards afzal
On Saturday, December 10, 2016 11:46:39 PM CET Afzal Mohammed wrote: > Hi, > > On Fri, Dec 02, 2016 at 03:05:18PM +0000, Vladimir Murzin wrote: > > > there was little interest to run A-class with MMU disabled (or > > 1:1 MMU mapping) as well. > > With a few more changes, on a Cortex-A platform, Kernel reached > maximum it can proceed w/o user space help, i.e. upto, > > "Kernel panic - not syncing: No working init found." > > Creating user space executables suitable for Cortex-A !MMU is the > distance to reach prompt. > > Seems no !MMU A-class suitable toolchains are available, the existing > !MMU toolchains available are for either M or R class. Looks like > FDPIC one's also are so (cc'ing Maxime & Mickeal in case they have > some input here). > > And compiling a suitable compiler failed. > > Let know if any signposts to travel the remaining distance. > > PS: Version used was v2 instead of this v3 series. What's wrong with the R class toolchain? Arnd
>>>>> "Afzal" == Afzal Mohammed <afzal.mohd.ma@gmail.com> writes: Hi, > Creating user space executables suitable for Cortex-A !MMU is the > distance to reach prompt. > Seems no !MMU A-class suitable toolchains are available, the existing > !MMU toolchains available are for either M or R class. Looks like > FDPIC one's also are so (cc'ing Maxime & Mickeal in case they have > some input here). > And compiling a suitable compiler failed. > Let know if any signposts to travel the remaining distance. You can build a toolchain and initramfs with Buildroot. Have a look at the stm32f429 nommu config: https://git.buildroot.net/buildroot/tree/configs/stm32f429_disco_defconfig
Hi, On Sat, Dec 10, 2016 at 08:19:19PM +0100, Arnd Bergmann wrote: > On Saturday, December 10, 2016 11:46:39 PM CET Afzal Mohammed wrote: > > Seems no !MMU A-class suitable toolchains are available, the existing > > !MMU toolchains available are for either M or R class. Looks like > > FDPIC one's also are so (cc'ing Maxime & Mickeal in case they have > > some input here). > > > > And compiling a suitable compiler failed. > > > > Let know if any signposts to travel the remaining distance. > What's wrong with the R class toolchain? Yes, hoping that R class toochain for Linux would help here. After a sleep, the same thing came to my mind. The search for R class toolchains turned up baremetal ones only (including Linaro's), but seems there are people using R class with Linux, so the journey now is to get/create R class Linux toolchain. Regards afzal
Hi, On Sat, Dec 10, 2016 at 10:15:35PM +0100, Peter Korsgaard wrote: > >>>>> "Afzal" == Afzal Mohammed <afzal.mohd.ma@gmail.com> writes: > > Seems no !MMU A-class suitable toolchains are available, the existing > > !MMU toolchains available are for either M or R class. Looks like > > FDPIC one's also are so (cc'ing Maxime & Mickeal in case they have > > some input here). > > > And compiling a suitable compiler failed. > > > Let know if any signposts to travel the remaining distance. > You can build a toolchain and initramfs with Buildroot. Have a look at > the stm32f429 nommu config: > > https://git.buildroot.net/buildroot/tree/configs/stm32f429_disco_defconfig iiuc, it builds one for Cortex-M. i already had a file system w/ busybox compiled using a Cortex-M toolchain (stolen from Pengutronix's OSELAS.Toolchain), which works on Cortex M4 (Vybrid VF610 M4 core). But it does not work here, i.e. on Cortex A, seems the above mentioned also would have the same effect. And in buildroot, couldn't see Cortex R option in menuconfig, and selecting Cortex-A's excludes flat binary target & presents only with ELF. Here compiler was attempted to be built using crosstool-NG, target selected was "arm-unknown-linux-gnueabi", and in crosstool-NG menuconfig, MMU was deselected, upon building target got changed to "arm-unknown-linux-uclibcgnueabi". After building binutils & pass 1 compiler, it failed while building multilib. Probably would have to dive into toolchain details now. Regards afzal
>>>>> "Afzal" == Afzal Mohammed <afzal.mohd.ma@gmail.com> writes: Hi, >> You can build a toolchain and initramfs with Buildroot. Have a look at >> the stm32f429 nommu config: >> >> https://git.buildroot.net/buildroot/tree/configs/stm32f429_disco_defconfig > iiuc, it builds one for Cortex-M. i already had a file system w/ > busybox compiled using a Cortex-M toolchain (stolen from > Pengutronix's OSELAS.Toolchain), which works on Cortex M4 (Vybrid > VF610 M4 core). But it does not work here, i.e. on Cortex A, seems the > above mentioned also would have the same effect. Hmm, I'm not sure why a cortex-M toolchain wouldn't work on cortex-A, I thought the 'M' instruction set was a pure subset of the 'A'. > And in buildroot, couldn't see Cortex R option in menuconfig, and > selecting Cortex-A's excludes flat binary target & presents only with > ELF. We indeed don't have cortex-R support. I'm not aware of any cortex-R Linux support. When you select a cortex-A variant, then we enable MMU support by default, but you can disable it under toolchain options (Enable MMU) and then the flat binary option is available.
Hi all, You can find an R toolchain here: https://github.com/mickael-guene/fdpic_manifest/releases/download/v7-r-1.0.1/toolset-v7-r-1.0.1-0-gbdcc6a7c-armv7-r.tgz It's an fdpic toolset for cortex-r cpu class. gcc version is quite old (4.7). Note also that generated code may crash on class A cpu due to generation of udiv/sdiv which is optional for class A. (cortex a15 is ok but not a9). Hope it helps Regards Mickael On 12/11/2016 09:01 PM, Peter Korsgaard wrote: >>>>>> "Afzal" == Afzal Mohammed <afzal.mohd.ma@gmail.com> writes: > > Hi, > > >> You can build a toolchain and initramfs with Buildroot. Have a look at > >> the stm32f429 nommu config: > >> > >> https://git.buildroot.net/buildroot/tree/configs/stm32f429_disco_defconfig > > > iiuc, it builds one for Cortex-M. i already had a file system w/ > > busybox compiled using a Cortex-M toolchain (stolen from > > Pengutronix's OSELAS.Toolchain), which works on Cortex M4 (Vybrid > > VF610 M4 core). But it does not work here, i.e. on Cortex A, seems the > > above mentioned also would have the same effect. > > Hmm, I'm not sure why a cortex-M toolchain wouldn't work on cortex-A, I > thought the 'M' instruction set was a pure subset of the 'A'. > > > And in buildroot, couldn't see Cortex R option in menuconfig, and > > selecting Cortex-A's excludes flat binary target & presents only with > > ELF. > > We indeed don't have cortex-R support. I'm not aware of any cortex-R > Linux support. > > When you select a cortex-A variant, then we enable MMU support by > default, but you can disable it under toolchain options (Enable MMU) and > then the flat binary option is available. >
Hi, On 12/12/16 07:07, mickael guene wrote: > Hi all, > > You can find an R toolchain here: > https://github.com/mickael-guene/fdpic_manifest/releases/download/v7-r-1.0.1/toolset-v7-r-1.0.1-0-gbdcc6a7c-armv7-r.tgz > > It's an fdpic toolset for cortex-r cpu class. gcc version is > quite old (4.7). > > Note also that generated code may crash on class A cpu due to > generation of udiv/sdiv which is optional for class A. > (cortex a15 is ok but not a9). > > Hope it helps Unfortunately, it doesn't help because it depends on FDPIC Linux patches which are out of tree and no link has been given. M-class toolchain should just work with A-class; you don't even need to disable MMU to try it out after d782e42 ("ARM: 8594/1: enable binfmt_flat on systems with an MMU"). Cheers Vladimir > > Regards > Mickael > > On 12/11/2016 09:01 PM, Peter Korsgaard wrote: >>>>>>> "Afzal" == Afzal Mohammed <afzal.mohd.ma@gmail.com> writes: >> >> Hi, >> >> >> You can build a toolchain and initramfs with Buildroot. Have a look at >> >> the stm32f429 nommu config: >> >> >> >> https://git.buildroot.net/buildroot/tree/configs/stm32f429_disco_defconfig >> >> > iiuc, it builds one for Cortex-M. i already had a file system w/ >> > busybox compiled using a Cortex-M toolchain (stolen from >> > Pengutronix's OSELAS.Toolchain), which works on Cortex M4 (Vybrid >> > VF610 M4 core). But it does not work here, i.e. on Cortex A, seems the >> > above mentioned also would have the same effect. >> >> Hmm, I'm not sure why a cortex-M toolchain wouldn't work on cortex-A, I >> thought the 'M' instruction set was a pure subset of the 'A'. >> >> > And in buildroot, couldn't see Cortex R option in menuconfig, and >> > selecting Cortex-A's excludes flat binary target & presents only with >> > ELF. >> >> We indeed don't have cortex-R support. I'm not aware of any cortex-R >> Linux support. >> >> When you select a cortex-A variant, then we enable MMU support by >> default, but you can disable it under toolchain options (Enable MMU) and >> then the flat binary option is available. >> >
On Sun, Dec 11, 2016 at 12:31:04PM +0530, Afzal Mohammed wrote: > And in buildroot, > couldn't see Cortex R option in menuconfig, and selecting Cortex-A's > excludes flat binary target & presents only with ELF. That's something which has changed in the kernel - you can now build for MMUful platforms, and run flat binaries. See commit d782e426b835 ("ARM: 8594/1: enable binfmt_flat on systems with an MMU").
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c index 40a7c4a..c737124 100644 --- a/drivers/mtd/nand/orion_nand.c +++ b/drivers/mtd/nand/orion_nand.c @@ -65,7 +65,7 @@ static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) */ register uint64_t x asm ("r2"); - asm volatile ("ldrd\t%0, [%1]" : "=&r" (x) : "r" (io_base)); +// asm volatile ("ldrd\t%0, [%1]" : "=&r" (x) : "r" (io_base)); buf64[i++] = x; } i *= 8;
Hi, With transition to MULTIPLATFORM we lost capability to build NOMMU configurations. Maybe not a big deal, but there is still interest in building NOMMU configuration apart from M-class cores. Basically, I'm talking about R-class cores which shares a lot with A-class except MMU; there was little interest to run A-class with MMU disabled (or 1:1 MMU mapping) as well. By now it is not even possible to build such configurations without extra patches on top. Another aspect is that some portion of NOMMU code have been (build) untested for a while. All these makes it even harder to involve more people in using NOMMU and build community around that. This series is trying to make it possible to build NOMMU configurations. It is done in PATCH 25/25 which allows to select ARCH_MULTIPLATFORM even for NOMMU. This is controlled with EXPERT config option. All patches prior 25/25 is an attempt to fix build failures for NOMMU case. I don't claim they are 100% correct, so I'm open to suggestion how they can be done in a better way. It was build tested with allmodconfig and defconfigs [1] with !MMU. Additionally, I've been running randconfig, so two more patches have been added compared to RFC v2. I had to keep following diff on top: Not sure all cases are fixed yet, so keep running randconfig. Patches can be pulled from Git tree: git://linux-arm.org/linux-vm.git (branch: nommu-rfc-v3) Cc: Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Russell King <linux@armlinux.org.uk> Thanks! Vladimir Murzin (25): ARM: NOMMU: define stubs for fixup ARM: NOMMU: define debug_ll_io_ini ARM: debug: allow debug_ll_addr for NOMMU ARM: NOMMU: define SECTION_xxx macros ARM: NOMMU: define dummy user structure for feroceon ARM: NOMMU: define __arm_ioremap_exec and pci_ioremap functions ARM: NOMMU: relax restriction on MPU existence ARM: NOMMU: fix head-nommu build for pre-ARMv7 CPUs ARM: NOMMU: fix load of CONFIG_VECTORS_BASE ARM: NOMMU: implement secondary_startup_arm ARM: move arm_heavy_mb to MMU/noMMU neutral place ARM: tlbflush: drop dependency on CONFIG_SMP ARM: sleep: allow it to be build for R-class ARM: setup: move call to erratum_a15_798181_init under CONFIG_MMU ARM: kexec: disallow kexec for NOMMU builds ARM: ep93xx: select ARM_PATCH_PHYS_VIRT for MMU builds only ARM: omap: do not select HIGHMEM explicitly ARM: sa1100: move CPU specific copy code under its own config ARM: sa11x0: assabet: add dependency on MMU ARM: i.MX: remove map_io callback PCI: tegra: limit to MMU build only IB: add dependency on MMU cnic: add dependency on MMU scsi: bnx2i: bnx2fc: add dependency on MMU ARM: Allow ARCH_MULTIPLATFORM to be selected for NOMMU arch/arm/Kconfig | 25 +++++++++++++++++++---- arch/arm/include/asm/fixmap.h | 6 ++++++ arch/arm/include/asm/mach/map.h | 3 +++ arch/arm/include/asm/page.h | 2 +- arch/arm/include/asm/pgtable-nommu.h | 6 ++++++ arch/arm/include/asm/tlbflush.h | 2 +- arch/arm/kernel/Makefile | 5 +++++ arch/arm/kernel/debug.S | 6 ++++-- arch/arm/kernel/head-nommu.S | 30 +++++++++++++++++++++++----- arch/arm/kernel/setup.c | 4 ++-- arch/arm/kernel/sleep.S | 8 ++++---- arch/arm/mach-imx/mach-imx1.c | 1 - arch/arm/mach-omap2/Kconfig | 1 - arch/arm/mach-sa1100/Kconfig | 1 + arch/arm/mm/Kconfig | 4 ++++ arch/arm/mm/Makefile | 2 +- arch/arm/mm/flush.c | 15 -------------- arch/arm/mm/iomap.c | 17 ++++++++++++++++ arch/arm/mm/nommu.c | 35 +++++++++++++++++++++++++++++++++ drivers/infiniband/Kconfig | 1 + drivers/net/ethernet/broadcom/Kconfig | 1 + drivers/pci/host/Kconfig | 2 +- drivers/scsi/bnx2fc/Kconfig | 1 + drivers/scsi/bnx2i/Kconfig | 1 + 24 files changed, 141 insertions(+), 38 deletions(-) [1] List of errors/warnings from defconfigs: acs5k_defconfig arch/arm/mach-ks8695/cpu.c:37:24: warning: 'ks8695_io_desc' defined but not used [-Wunused-variable] static struct map_desc ks8695_io_desc[] __initdata = { ^ acs5k_tiny_defconfig arch/arm/mach-ks8695/cpu.c:37:24: warning: 'ks8695_io_desc' defined but not used [-Wunused-variable] static struct map_desc ks8695_io_desc[] __initdata = { ^ am200epdkit_defconfig aspeed_g4_defconfig aspeed_g5_defconfig assabet_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ /work/tools/gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-ld: no machine record defined make: *** [vmlinux] Error 1 at91_dt_defconfig axm55xx_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ badge4_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/badge4.c:295:24: warning: 'badge4_io_desc' defined but not used [-Wunused-variable] static struct map_desc badge4_io_desc[] __initdata = { ^ bcm2835_defconfig cerfcube_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/cerf.c:137:24: warning: 'cerf_io_desc' defined but not used [-Wunused-variable] static struct map_desc cerf_io_desc[] __initdata = { ^ clps711x_defconfig cm_x2xx_defconfig cm_x300_defconfig cns3420vb_defconfig arch/arm/mach-cns3xxx/core.c:29:24: warning: 'cns3xxx_io_desc' defined but not used [-Wunused-variable] static struct map_desc cns3xxx_io_desc[] __initdata = { ^ arch/arm/mach-cns3xxx/cns3420vb.c:230:24: warning: 'cns3420_io_desc' defined but not used [-Wunused-variable] static struct map_desc cns3420_io_desc[] __initdata = { ^ colibri_pxa270_defconfig colibri_pxa300_defconfig collie_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/collie.c:403:24: warning: 'collie_io_desc' defined but not used [-Wunused-variable] static struct map_desc collie_io_desc[] __initdata = { ^ corgi_defconfig davinci_all_defconfig dove_defconfig arch/arm/mach-dove/common.c:50:24: warning: 'dove_io_desc' defined but not used [-Wunused-variable] static struct map_desc dove_io_desc[] __initdata = { ^ ebsa110_defconfig arch/arm/mach-ebsa110/core.c:72:24: warning: 'ebsa110_io_desc' defined but not used [-Wunused-variable] static struct map_desc ebsa110_io_desc[] __initdata = { ^ efm32_defconfig em_x270_defconfig ep93xx_defconfig arch/arm/mach-ep93xx/core.c:56:24: warning: 'ep93xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc ep93xx_io_desc[] __initdata = { ^ arch/arm/mach-ep93xx/ts72xx.c:32:24: warning: 'ts72xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc ts72xx_io_desc[] __initdata = { ^ arch/arm/mach-ep93xx/vision_ep9307.c:51:24: warning: 'vision_io_desc' defined but not used [-Wunused-variable] static struct map_desc vision_io_desc[] __initdata = { ^ eseries_pxa_defconfig exynos_defconfig arch/arm/mach-exynos/exynos.c:31:24: warning: 'exynos4_iodesc' defined but not used [-Wunused-variable] static struct map_desc exynos4_iodesc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ ezx_defconfig footbridge_defconfig arch/arm/mach-footbridge/common.c:140:24: warning: 'fb_common_io_desc' defined but not used [-Wunused-variable] static struct map_desc fb_common_io_desc[] __initdata = { ^ arch/arm/mach-footbridge/common.c:153:24: warning: 'ebsa285_host_io_desc' defined but not used [-Wunused-variable] static struct map_desc ebsa285_host_io_desc[] __initdata = { ^ h3600_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/h3xxx.c:274:24: warning: 'h3600_io_desc' defined but not used [-Wunused-variable] static struct map_desc h3600_io_desc[] __initdata = { ^ h5000_defconfig hackkit_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/hackkit.c:64:24: warning: 'hackkit_io_desc' defined but not used [-Wunused-variable] static struct map_desc hackkit_io_desc[] __initdata = { ^ hisi_defconfig arch/arm/mach-hisi/hisilicon.c:31:24: warning: 'hi3620_io_desc' defined but not used [-Wunused-variable] static struct map_desc hi3620_io_desc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ imote2_defconfig imx_v4_v5_defconfig arch/arm/mach-imx/mm-imx21.c:33:24: warning: 'imx21_io_desc' defined but not used [-Wunused-variable] static struct map_desc imx21_io_desc[] __initdata = { ^ arch/arm/mach-imx/mm-imx27.c:33:24: warning: 'imx27_io_desc' defined but not used [-Wunused-variable] static struct map_desc imx27_io_desc[] __initdata = { ^ arch/arm/mach-imx/mach-mx27ads.c:381:24: warning: 'mx27ads_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx27ads_io_desc[] __initdata = { ^ imx_v6_v7_defconfig arch/arm/mach-imx/mm-imx3.c:119:24: warning: 'mx31_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx31_io_desc[] __initdata = { ^ arch/arm/mach-imx/mm-imx3.c:216:24: warning: 'mx35_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx35_io_desc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ arch/arm/mach-imx/mach-mx31ads.c:542:24: warning: 'mx31ads_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx31ads_io_desc[] __initdata = { ^ arch/arm/mach-imx/mach-mx31lite.c:236:24: warning: 'mx31lite_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx31lite_io_desc[] __initdata = { ^ arch/arm/mach-imx/mach-kzm_arm11_01.c:262:24: warning: 'kzm_io_desc' defined but not used [-Wunused-variable] static struct map_desc kzm_io_desc[] __initdata = { ^ integrator_defconfig iop13xx_defconfig iop32x_defconfig iop33x_defconfig ixp4xx_defconfig jornada720_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/jornada720.c:277:24: warning: 'jornada720_io_desc' defined but not used [-Wunused-variable] static struct map_desc jornada720_io_desc[] __initdata = { ^ keystone_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ ks8695_defconfig arch/arm/mach-ks8695/cpu.c:37:24: warning: 'ks8695_io_desc' defined but not used [-Wunused-variable] static struct map_desc ks8695_io_desc[] __initdata = { ^ lart_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/lart.c:115:24: warning: 'lart_io_desc' defined but not used [-Wunused-variable] static struct map_desc lart_io_desc[] __initdata = { ^ lpc18xx_defconfig lpc32xx_defconfig arch/arm/mach-lpc32xx/common.c:70:24: warning: 'lpc32xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc lpc32xx_io_desc[] __initdata = { ^ lpd270_defconfig lubbock_defconfig magician_defconfig mainstone_defconfig mini2440_defconfig arch/arm/mach-s3c24xx/common.c:155:24: warning: 's3c_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c244x.c:49:24: warning: 's3c244x_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c244x_iodesc[] __initdata = { ^ mmp2_defconfig arch/arm/mach-mmp/common.c:28:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ moxart_defconfig mps2_defconfig multi_v4t_defconfig arch/arm/mach-clps711x/board-dt.c:33:24: warning: 'clps711x_io_desc' defined but not used [-Wunused-variable] static struct map_desc clps711x_io_desc __initdata = { ^ multi_v5_defconfig arch/arm/mach-imx/mm-imx21.c:33:24: warning: 'imx21_io_desc' defined but not used [-Wunused-variable] static struct map_desc imx21_io_desc[] __initdata = { ^ arch/arm/mach-imx/mm-imx27.c:33:24: warning: 'imx27_io_desc' defined but not used [-Wunused-variable] static struct map_desc imx27_io_desc[] __initdata = { ^ arch/arm/mach-imx/mach-mx27ads.c:381:24: warning: 'mx27ads_io_desc' defined but not used [-Wunused-variable] static struct map_desc mx27ads_io_desc[] __initdata = { ^ multi_v7_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ arch/arm/mach-exynos/exynos.c:31:24: warning: 'exynos4_iodesc' defined but not used [-Wunused-variable] static struct map_desc exynos4_iodesc[] __initdata = { ^ arch/arm/mach-hisi/hisilicon.c:31:24: warning: 'hi3620_io_desc' defined but not used [-Wunused-variable] static struct map_desc hi3620_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:141:24: warning: 'omap34xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap34xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:188:24: warning: 'omapti81xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omapti81xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:199:24: warning: 'omapam33xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omapam33xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:216:24: warning: 'omap44xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap44xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:239:24: warning: 'omap54xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap54xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:268:24: warning: 'dra7xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc dra7xx_io_desc[] __initdata = { ^ arch/arm/mach-tegra/io.c:33:24: warning: 'tegra_io_desc' defined but not used [-Wunused-variable] static struct map_desc tegra_io_desc[] __initdata = { ^ arch/arm/mach-vt8500/vt8500.c:52:24: warning: 'vt8500_io_desc' defined but not used [-Wunused-variable] static struct map_desc vt8500_io_desc[] __initdata = { ^ arch/arm/mach-spear/spear13xx.c:60:24: warning: 'spear13xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc spear13xx_io_desc[] __initdata = { ^ arch/arm/mach-spear/spear1310.c:43:24: warning: 'spear1310_io_desc' defined but not used [-Wunused-variable] static struct map_desc spear1310_io_desc[] __initdata = { ^ mv78xx0_defconfig mvebu_v5_defconfig mvebu_v7_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ mxs_defconfig neponset_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ /work/tools/gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-ld: no machine record defined make: *** [vmlinux] Error 1 netwinder_defconfig arch/arm/mach-footbridge/common.c:140:24: warning: 'fb_common_io_desc' defined but not used [-Wunused-variable] static struct map_desc fb_common_io_desc[] __initdata = { ^ arch/arm/mach-footbridge/common.c:153:24: warning: 'ebsa285_host_io_desc' defined but not used [-Wunused-variable] static struct map_desc ebsa285_host_io_desc[] __initdata = { ^ In file included from sound/oss/os.h:20:0, from sound/oss/sound_config.h:20, from sound/oss/midibuf.c:21: sound/oss/midibuf.c: In function 'MIDIbuf_read': ./arch/arm/include/asm/uaccess.h:530:38: warning: 'tmp_data' may be used uninitialized in this function [-Wmaybe-uninitialized] #define __copy_to_user(to, from, n) (memcpy((void __force *)to, from, n), 0) ^ sound/oss/midibuf.c:316:16: note: 'tmp_data' was declared here unsigned char tmp_data; ^ netx_defconfig arch/arm/mach-netx/generic.c:33:24: warning: 'netx_io_desc' defined but not used [-Wunused-variable] static struct map_desc netx_io_desc[] __initdata = { ^ nhk8815_defconfig arch/arm/mach-nomadik/cpu-8815.c:86:24: warning: 'cpu8815_io_desc' defined but not used [-Wunused-variable] static struct map_desc cpu8815_io_desc[] __initdata = { ^ nuc910_defconfig arch/arm/mach-w90x900/cpu.c:45:24: warning: 'nuc900_iodesc' defined but not used [-Wunused-variable] static struct map_desc nuc900_iodesc[] __initdata = { ^ nuc950_defconfig arch/arm/mach-w90x900/cpu.c:45:24: warning: 'nuc900_iodesc' defined but not used [-Wunused-variable] static struct map_desc nuc900_iodesc[] __initdata = { ^ nuc960_defconfig arch/arm/mach-w90x900/cpu.c:45:24: warning: 'nuc900_iodesc' defined but not used [-Wunused-variable] static struct map_desc nuc900_iodesc[] __initdata = { ^ omap1_defconfig omap2plus_defconfig arch/arm/mach-omap2/io.c:71:24: warning: 'omap24xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap24xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:87:24: warning: 'omap242x_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap242x_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:111:24: warning: 'omap243x_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap243x_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:141:24: warning: 'omap34xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap34xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:188:24: warning: 'omapti81xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omapti81xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:199:24: warning: 'omapam33xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omapam33xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:216:24: warning: 'omap44xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap44xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:239:24: warning: 'omap54xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc omap54xx_io_desc[] __initdata = { ^ arch/arm/mach-omap2/io.c:268:24: warning: 'dra7xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc dra7xx_io_desc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ orion5x_defconfig palmz72_defconfig pcm027_defconfig pleb_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ prima2_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ pxa168_defconfig arch/arm/mach-mmp/common.c:28:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ pxa255-idp_defconfig pxa3xx_defconfig pxa910_defconfig arch/arm/mach-mmp/common.c:28:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ pxa_defconfig qcom_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ raumfeld_defconfig realview_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ rpc_defconfig s3c2410_defconfig arch/arm/mach-s3c24xx/common.c:155:24: warning: 's3c_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c2410.c:54:24: warning: 's3c2410_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c2410_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c2412.c:64:24: warning: 's3c2412_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c2412_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c2416.c:69:24: warning: 's3c2416_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c2416_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c244x.c:49:24: warning: 's3c244x_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c244x_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c2443.c:50:24: warning: 's3c2443_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c2443_iodesc[] __initdata = { ^ s3c6400_defconfig arch/arm/mach-s3c64xx/common.c:106:24: warning: 's3c_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c_iodesc[] __initdata = { ^ s5pv210_defconfig sama5_defconfig shannon_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ shmobile_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ simpad_defconfig arch/arm/mach-sa1100/generic.c:350:24: warning: 'standard_io_desc' defined but not used [-Wunused-variable] static struct map_desc standard_io_desc[] __initdata = { ^ arch/arm/mach-sa1100/simpad.c:121:24: warning: 'simpad_io_desc' defined but not used [-Wunused-variable] static struct map_desc simpad_io_desc[] __initdata = { ^ socfpga_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ spear13xx_defconfig arch/arm/mach-spear/spear13xx.c:60:24: warning: 'spear13xx_io_desc' defined but not used [-Wunused-variable] static struct map_desc spear13xx_io_desc[] __initdata = { ^ arch/arm/mach-spear/spear1310.c:43:24: warning: 'spear1310_io_desc' defined but not used [-Wunused-variable] static struct map_desc spear1310_io_desc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ spear3xx_defconfig spear6xx_defconfig spitz_defconfig stm32_defconfig sunxi_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ tct_hammer_defconfig arch/arm/mach-s3c24xx/common.c:155:24: warning: 's3c_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c_iodesc[] __initdata = { ^ arch/arm/mach-s3c24xx/s3c2410.c:54:24: warning: 's3c2410_iodesc' defined but not used [-Wunused-variable] static struct map_desc s3c2410_iodesc[] __initdata = { ^ tegra_defconfig arch/arm/mach-tegra/io.c:33:24: warning: 'tegra_io_desc' defined but not used [-Wunused-variable] static struct map_desc tegra_io_desc[] __initdata = { ^ arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ trizeps4_defconfig u300_defconfig u8500_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ versatile_defconfig vexpress_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd) ^ vf610m4_defconfig viper_defconfig vt8500_v6_v7_defconfig arch/arm/mach-vt8500/vt8500.c:52:24: warning: 'vt8500_io_desc' defined but not used [-Wunused-variable] static struct map_desc vt8500_io_desc[] __initdata = { ^ xcep_defconfig zeus_defconfig zx_defconfig arch/arm/kernel/smp.c:93:22: warning: 'get_arch_pgd' defined but not used [-Wunused-function] static unsigned long get_arch_pgd(pgd_t *pgd)