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2012-03-05m68k: make support for FPU hardware configurableGreg Ungerer1-0/+4
The classic m68k code has always supported an FPU (although it may have been a software emulated one). The non-MMU m68k code has never supported FPU hardware. To help in merging common code create a configation setting that signifies if we are builing in FPU support or not. This switch, CONFIG_FPU, is set as per the current use cases. So it is always enabled if CONFIG_MMU is set, and disabled otherwise. With a little extra code it will be possible to disable it on the classic m68k platforms as well, and to enable it on non-MMU platforms that do have hardware FPU. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2012-03-05m68knommu: remove unused CONFIG_GENERIC_CMOS_UPDATE optionGreg Ungerer1-3/+0
The CONFIG_GENERIC_CMOS_UPDATE switch is always enabled for the non-MMU m68k case. But the underlying code to support it, update_persistent_clock(), doesn't end up doing anything on the currently supported non-MMU platforms. No platforms supply the necessary function support for writing back the RTC. So lets remove this option and support code. This also brings m68knommu in line with the m68k, which doesn't enabled this switch either. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-01-11cpu: Register a generic CPU device on architectures that currently do notBen Hutchings1-0/+1
frv, h8300, m68k, microblaze, openrisc, score, um and xtensa currently do not register a CPU device. Add the config option GENERIC_CPU_DEVICES which causes a generic CPU device to be registered for each present CPU, and make all these architectures select it. Richard Weinberger <richard@nod.at> covered UML and suggested using per_cpu. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-10Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds1-3/+1
lib: use generic pci_iomap on all architectures Many architectures don't want to pull in iomap.c, so they ended up duplicating pci_iomap from that file. That function isn't trivial, and we are going to modify it https://lkml.org/lkml/2011/11/14/183 so the duplication hurts. This reduces the scope of the problem significantly, by moving pci_iomap to a separate file and referencing that from all architectures. * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: alpha: drop pci_iomap/pci_iounmap from pci-noop.c mn10300: switch to GENERIC_PCI_IOMAP mn10300: add missing __iomap markers frv: switch to GENERIC_PCI_IOMAP tile: switch to GENERIC_PCI_IOMAP tile: don't panic on iomap sparc: switch to GENERIC_PCI_IOMAP sh: switch to GENERIC_PCI_IOMAP powerpc: switch to GENERIC_PCI_IOMAP parisc: switch to GENERIC_PCI_IOMAP mips: switch to GENERIC_PCI_IOMAP microblaze: switch to GENERIC_PCI_IOMAP arm: switch to GENERIC_PCI_IOMAP alpha: switch to GENERIC_PCI_IOMAP lib: add GENERIC_PCI_IOMAP lib: move GENERIC_IOMAP to lib/Kconfig Fix up trivial conflicts due to changes nearby in arch/{m68k,score}/Kconfig
2011-12-30m68k: ColdFire with MMU enabled uses same clocking code as non-MMUGreg Ungerer1-1/+1
We want to use the same timer support code for ColdFire CPU's when running with MMU enabled or not. So use the same time_no.c code even when the MMU is enabled for ColdFire. This also means we do not want CONFIG_ARCH_USES_GETTIMEOFFSET set, since that code is only in time_mm.c. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-12-30m68k: compile appropriate mm arch files for ColdFire MMU supportGreg Ungerer1-1/+4
Create a config symbol to enable when using a ColdFire MMU. We then use that to only compile the necessary arch mm files. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com>
2011-12-30m68k: modify user space access functions to support ColdFire CPUsGreg Ungerer1-0/+3
Modify the user space access functions to support the ColdFire V4e cores running with MMU enabled. The ColdFire processors do not support the "moves" instruction used by the traditional 680x0 processors for moving data into and out of another address space. They only support the notion of a single address space, and you use the usual "move" instruction to access that. Create a new config symbol (CONFIG_CPU_HAS_ADDRESS_SPACES) to mark the CPU types that support separate address spaces, and thus also support the sfc/dfc registers and the "moves" instruction that go along with that. The code is almost identical for user space access, so lets just use a define to choose either the "move" or "moves" in the assembler code. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-12-24m68k: handle presence of 64bit mul/div instructions cleanlyGreg Ungerer1-0/+3
The traditional 68000 processors and the newer reduced instruction set ColdFire processors do not support the 32*32->64 multiply or the 64/32->32 divide instructions. This is not a difference based on the presence of a hardware MMU or not. Create a new config symbol to mark that a CPU type doesn't support the longer multiply/divide instructions. Use this then as a basis for using the fast 64bit based divide (in div64.h) and for linking in the extra libgcc functions that may be required (mulsi3, divsi3, etc). Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-12-24m68k: simpler m68k and ColdFire CPU's can use generic csum codeGreg Ungerer1-0/+3
We have two implementations of the IP checksuming code for the m68k arch. One uses the more advanced instructions available in 68020 and above processors, the other uses the simpler instructions available on the original 68000 processors and the modern ColdFire processors. This simpler code is pretty much the same as the generic lib implementation of the IP csum functions. So lets just switch over to using that. That means we can completely remove the checksum_no.c file, and only have the local fast code used for the more complex 68k CPU family members. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-12-24m68k: selection of GENERIC_ATOMIC64 is not MMU specificGreg Ungerer1-1/+0
The selection of the CONFIG_GENERIC_ATOMIC64 option is not specific to the MMU being present and enabled. It is a property of certain CPU families. So select it based on those CPU types being selected. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-11-24lib: move GENERIC_IOMAP to lib/KconfigMichael S. Tsirkin1-3/+1
define GENERIC_IOMAP in a central location instead of all architectures. This will be helpful for the follow-up patch which makes it select other configs. Code is also a bit shorter this way. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2011-11-08m68k/irq: Remove obsolete m68k irq frameworkGeert Uytterhoeven1-8/+2
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-11-08m68k/q40: Convert Q40/Q60 to genirqGeert Uytterhoeven1-1/+0
q40_irq_handler() must be kept to translate ISA IRQs to the range 1-15. q40_probe_irq_o{ff,n}() become unused. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Richard Zidlicky <rz@linux-m68k.org>
2011-11-08m68k/sun3: Convert Sun3/3x to genirqGeert Uytterhoeven1-2/+0
Replace the custom irq handler that masks the irq and calls do_IRQ(), and the unmasking in the individual handlers, by handle_level_irq(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sam Creasey <sammy@sammy.net>
2011-11-08m68k/apollo: Convert Apollo to genirqGeert Uytterhoeven1-1/+0
Replace the custom user vector interrupt handler that calls do_IRQ() and does an EOI by handle_fasteoi_irq(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Peter De Schrijver <p2@debian.org>
2011-11-08m68k/vme: Convert VME to genirqGeert Uytterhoeven1-3/+0
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Richard Hirst <rhirst@parisc-linux.org>
2011-11-08m68k/hp300: Convert HP9000/300 and HP9000/400 to genirqGeert Uytterhoeven1-1/+0
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Philip Blundell <philb@gnu.org>
2011-11-08m68k/mac: Convert Mac to genirqGeert Uytterhoeven1-1/+0
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-11-08m68k/amiga: Convert Amiga to genirqGeert Uytterhoeven1-1/+0
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-11-08m68k/atari: Convert Atari to genirqGeert Uytterhoeven1-1/+0
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> [v1] Acked-by: Thomas Gleixner <tglx@linutronix.de>
2011-11-08m68k/irq: Add genirq supportGeert Uytterhoeven1-0/+17
Disabled on all platforms for now Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> [v1] Acked-by: Thomas Gleixner <tglx@linutronix.de>
2011-10-18m68k: reorganize Kconfig options to improve mmu/non-mmu selectionsGreg Ungerer1-153/+42
The current mmu and non-mmu Kconfig files can be merged to form a more general selection of options. The current break up of options is due to the simple brute force merge from the m68k and m68knommu arch directories. Many of the options are not at all specific to having the MMU enabled or not. They are actually associated with a particular CPU type or platform type. Ultimately as we support all processors with the MMU disabled we need many of these options to be selectable without the MMU option enabled. And likewise some of the ColdFire processors, which currently are only supported with the MMU disabled, do have MMU hardware, and will need to have options selected on CPU type, not MMU disabled. This patch removes the old mmu and non-mmu Kconfigs and instead breaks up the configuration into four areas: cpu, machine, bus, devices. The Kconfig.cpu lists all the options associated with selecting a CPU, and includes options specific to each CPU type as well. Kconfig.machine lists all options associated with selecting a machine type. Almost always the machines selectable is restricted by the chosen CPU. Kconfig.bus contains options associated with selecting bus types on the various machine types. That includes PCI bus, PCMCIA bus, etc. Kconfig.devices contains options for drivers and driver associated options. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-08-03Merge branch 'apei' into apei-releaseLen Brown1-0/+1
Some trivial conflicts due to other various merges adding to the end of common lists sooner than this one. arch/ia64/Kconfig arch/powerpc/Kconfig arch/x86/Kconfig lib/Kconfig lib/Makefile Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-03Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHGHuang Ying1-0/+1
cmpxchg() is widely used by lockless code, including NMI-safe lockless code. But on some architectures, the cmpxchg() implementation is not NMI-safe, on these architectures the lockless code may need a spin_trylock_irqsave() based implementation. This patch adds a Kconfig option: ARCH_HAVE_NMI_SAFE_CMPXCHG, so that NMI-safe lockless code can depend on it or provide different implementation according to it. On many architectures, cmpxchg is only NMI-safe for several specific operand sizes. So, ARCH_HAVE_NMI_SAFE_CMPXCHG define in this patch only guarantees cmpxchg is NMI-safe for sizeof(unsigned long). Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Richard Henderson <rth@twiddle.net> CC: Mikael Starvik <starvik@axis.com> Acked-by: David Howells <dhowells@redhat.com> CC: Yoshinori Sato <ysato@users.sourceforge.jp> CC: Tony Luck <tony.luck@intel.com> CC: Hirokazu Takata <takata@linux-m32r.org> CC: Geert Uytterhoeven <geert@linux-m68k.org> CC: Michal Simek <monstr@monstr.eu> Acked-by: Ralf Baechle <ralf@linux-mips.org> CC: Kyle McMartin <kyle@mcmartin.ca> CC: Martin Schwidefsky <schwidefsky@de.ibm.com> CC: Chen Liqin <liqin.chen@sunplusct.com> CC: "David S. Miller" <davem@davemloft.net> CC: Ingo Molnar <mingo@redhat.com> CC: Chris Zankel <chris@zankel.net> Signed-off-by: Len Brown <len.brown@intel.com>
2011-07-25m68k: merge mmu and non-mmu bitops.hGreg Ungerer1-0/+4
The following patch merges the mmu and non-mmu versions of the m68k bitops.h files. Now there is a good deal of difference between the two files, but none of it is actually an mmu specific difference. It is all about the specific m68k/coldfire varient we are targeting. So it makes an awful lot of sense to merge these into a single bitops.h. There is a number of ways I can see to factor this code. The approach I have taken here is to keep the various versions of each macro/function type together. This means that there is some ifdefery with each to handle each CPU type. I have added some comments in a couple of appropriate places to try and make it clear what the differences we are dealing with are. Specifically the instruction and addressing mode differences we have to deal with. The merged form keeps the same underlying optimizations for each CPU type for all the general bit clear/set/change and find bit operations. It does switch to using the generic le operations though, instead of any local varients. Build tested on ColdFire, 68328, 68360 (which is cpu32) and 68020+. Run tested on ColdFire and ARAnyM. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-05-24m68knommu: Use generic show_interrupts()Geert Uytterhoeven1-0/+1
Apart from whitespace differences, /proc/interrupts doesn't change by enabling GENERIC_IRQ_SHOW. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-03-30genirq: Remove the now obsolete config options and select statementsThomas Gleixner1-1/+0
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-25m68k: merge m68k and m68knommu arch directoriesGreg Ungerer1-423/+33
There is a lot of common code that could be shared between the m68k and m68knommu arch branches. It makes sense to merge the two branches into a single directory structure so that we can more easily share that common code. This is a brute force merge, based on a script from Stephen King <sfking@fdwdc.com>, which was originally written by Arnd Bergmann <arnd@arndb.de>. > The script was inspired by the script Sam Ravnborg used to merge the > includes from m68knommu. For those files common to both arches but > differing in content, the m68k version of the file is renamed to > <file>_mm.<ext> and the m68knommu version of the file is moved into the > corresponding m68k directory and renamed <file>_no.<ext> and a small > wrapper file <file>.<ext> is used to select between the two version. Files > that are common to both but don't differ are removed from the m68knommu > tree and files and directories that are unique to the m68knommu tree are > moved to the m68k tree. Finally, the arch/m68knommu tree is removed. > > To select between the the versions of the files, the wrapper uses > > #ifdef CONFIG_MMU > #include <file>_mm.<ext> > #else > #include <file>_no.<ext> > #endif On top of this file merge I have done a simplistic merge of m68k and m68knommu Kconfig, which primarily attempts to keep existing options and menus in place. Other than a handful of options being moved it produces identical .config outputs on m68k and m68knommu targets I tested it on. With this in place there is now quite a bit of scope for merge cleanups in future patches. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-03-16Merge branch 'for-linus' of ↵Linus Torvalds1-2/+31
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/block: amiflop - Remove superfluous amiga_chip_alloc() cast m68k/atari: ARAnyM - Add support for network access m68k/atari: ARAnyM - Add support for console access m68k/atari: ARAnyM - Add support for block access m68k/atari: Initial ARAnyM support m68k: Kconfig - Remove unneeded "default n" m68k: Makefiles - Change to new flags variables m68k/amiga: Reclaim Chip RAM for PPC exception handlers m68k: Allow all kernel traps to be handled via exception fixups m68k: Use base_trap_init() to initialize vectors m68k: Add helper function handle_kernel_fault()
2011-03-16m68k/atari: ARAnyM - Add support for network accessMilan Jurik1-0/+8
[petr: Second author] [michael, geert: Cleanups and updates] Signed-off-by: Milan Jurik <milan.jurik@xylab.cz> Signed-off-by: Petr Stehlik <pstehlik@sophics.cz> Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: netdev@vger.kernel.org
2011-03-16m68k/atari: ARAnyM - Add support for console accessRoman Zippel1-0/+8
[geert: Cleanups and updates] Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Petr Stehlik <pstehlik@sophics.cz>
2011-03-16m68k/atari: ARAnyM - Add support for block accessRoman Zippel1-0/+8
[geert: Cleanups and updates] Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Petr Stehlik <pstehlik@sophics.cz>
2011-03-16m68k/atari: Initial ARAnyM supportPetr Stehlik1-0/+7
Add improved support for running under the ARAnyM emulator (Atari Running on Any Machine - http://aranym.org/). [michael, geert: Cleanups and updates] Signed-off-by: Petr Stehlik <pstehlik@sophics.cz> Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-03-16m68k: Kconfig - Remove unneeded "default n"Geert Uytterhoeven1-2/+0
Reported-by: Phillip Lougher <phillip@lougher.demon.co.uk> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-02-22tty: move obsolete and broken tty drivers to drivers/staging/tty/Greg Kroah-Hartman1-8/+0
As planned by Arnd Bergmann, this moves the following drivers to the drivers/staging/tty/ directory where they will be removed after 2.6.41 if no one steps up to claim them. epca epca ip2 istallion riscom8 serial167 specialix stallion Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-28Merge branch 'kconfig' of ↵Linus Torvalds1-6/+0
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits) kbuild: convert `arch/tile' to the kconfig mainmenu upgrade README: cite nconfig Revert "kconfig: Temporarily disable dependency warnings" kconfig: Use PATH_MAX instead of 128 for path buffer sizes. kconfig: Fix realloc usage() kconfig: Propagate const kconfig: Don't go out from read config loop when you read new symbol kconfig: fix menuconfig on debian lenny kbuild: migrate all arch to the kconfig mainmenu upgrade kconfig: expand file names kconfig: use the file's name of sourced file kconfig: constify file name kconfig: don't emit warning upon rootmenu's prompt redefinition kconfig: replace KERNELVERSION usage by the mainmenu's prompt kconfig: delay gconf window initialization kconfig: expand by default the rootmenu's prompt kconfig: add a symbol string expansion helper kconfig: regen parser kconfig: implement the `mainmenu' directive kconfig: allow PACKAGE to be defined on the compiler's command-line ... Fix up trivial conflict in arch/mn10300/Kconfig
2010-10-22m68k: Remove dead GG2 config optionChristian Dietrich1-2/+2
CONFIG_GG2 doesn't exist in Kconfig, therefore remove all references to it from the source. Signed-off-by: Christian Dietrich <qy03fugy@stud.informatik.uni-erlangen.de> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-10-12Merge branch 'kbuild/rc-fixes' into kbuild/kconfigMichal Marek1-3/+0
We need to revert the temporary hack in 71ebc01, hence the merge.
2010-09-19kbuild: migrate all arch to the kconfig mainmenu upgradeArnaud Lacombe1-6/+0
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Michal Marek <mmarek@suse.cz>
2010-07-27time: Kill off CONFIG_GENERIC_TIMEJohn Stultz1-3/+0
Now that all arches have been converted over to use generic time via clocksources or arch_gettimeoffset(), we can remove the GENERIC_TIME config option and simplify the generic code. Signed-off-by: John Stultz <johnstul@us.ibm.com> LKML-Reference: <1279068988-21864-4-git-send-email-johnstul@us.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-05-26m68k: Enable atomic64_tGeert Uytterhoeven1-0/+1
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-02-27mac68k: replace mac68k SCC code with platform deviceFinn Thain1-5/+1
Remove the old 68k Mac serial port code and a lot of related cruft. Add new SCC platform devices to mac 68k platform. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-10-30tty: Mark generic_serial users as BROKENAlan Cox1-3/+3
There isn't much else I can do with these. I can find no hardware for any of them and no users. The code is broken. Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-22m68k: convert to use arch_gettimeoffset()john stultz1-0/+6
Convert m68k to use GENERIC_TIME via the arch_getoffset() infrastructure, reducing the amount of arch specific code we need to maintain. I've taken my best swing at converting this, but I'm not 100% confident I got it right. My cross-compiler is now out of date (gcc4.2) so I wasn't able to check if it compiled. Any assistance from arch maintainers or testers to get this merged would be great. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06trivial: fix then -> than typos in comments and documentationFrederik Schwarzer1-1/+1
- (better, more, bigger ...) then -> (...) than Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-01-02m68k: fix recursive dependency in KconfigSam Ravnborg1-1/+0
We had a recursive dependency between MMU_MOTOROLA and MMU_SUN3 Fix it by dropping the unused dependencies on MMU_MOTOROLA. MMU_MOTOROLA is set to y only using select so any dependencies are anyway ignored. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org>
2008-10-20container freezer: implement freezer cgroup subsystemMatt Helsley1-0/+2
This patch implements a new freezer subsystem in the control groups framework. It provides a way to stop and resume execution of all tasks in a cgroup by writing in the cgroup filesystem. The freezer subsystem in the container filesystem defines a file named freezer.state. Writing "FROZEN" to the state file will freeze all tasks in the cgroup. Subsequently writing "RUNNING" will unfreeze the tasks in the cgroup. Reading will return the current state. * Examples of usage : # mkdir /containers/freezer # mount -t cgroup -ofreezer freezer /containers # mkdir /containers/0 # echo $some_pid > /containers/0/tasks to get status of the freezer subsystem : # cat /containers/0/freezer.state RUNNING to freeze all tasks in the container : # echo FROZEN > /containers/0/freezer.state # cat /containers/0/freezer.state FREEZING # cat /containers/0/freezer.state FROZEN to unfreeze all tasks in the container : # echo RUNNING > /containers/0/freezer.state # cat /containers/0/freezer.state RUNNING This is the basic mechanism which should do the right thing for user space task in a simple scenario. It's important to note that freezing can be incomplete. In that case we return EBUSY. This means that some tasks in the cgroup are busy doing something that prevents us from completely freezing the cgroup at this time. After EBUSY, the cgroup will remain partially frozen -- reflected by freezer.state reporting "FREEZING" when read. The state will remain "FREEZING" until one of these things happens: 1) Userspace cancels the freezing operation by writing "RUNNING" to the freezer.state file 2) Userspace retries the freezing operation by writing "FROZEN" to the freezer.state file (writing "FREEZING" is not legal and returns EIO) 3) The tasks that blocked the cgroup from entering the "FROZEN" state disappear from the cgroup's set of tasks. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: export thaw_process] Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Matt Helsley <matthltc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-14m68k: remove the dead PCI codeAdrian Bunk1-4/+0
This patch removes the no longer used m68k PCI code. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-14m68k: Remove the broken Hades supportAdrian Bunk1-13/+0
This patch removes the Hades support that was marked as BROKEN 5 years ago. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-14m68k: Reverse platform MMU logic so Sun 3 is lastGeert Uytterhoeven1-21/+22
Currently Sun 3 support is the first platform option, as the Sun 3 MMU is incompatible with standard Motorola MMUs. However, this means that `allmodconfig' enables support for Sun 3, and thus disables support for all other platforms. Reverse the logic and move Sun 3 last, so `allmodconfig' enables all platforms except for Sun 3, increasing compile-coverage. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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