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* x86: GEODE fix a race condition in the MFGPT timer tickJordan Crouse2008-01-221-7/+8
| | | | | | | | | | | | | | | | | | | When we set the MFGPT timer tick, there is a chance that we'll immediately assert an event. If for some reason the IRQ routing for this clock has been setup for some other purpose, then we could end up firing an interrupt into the SMM handler or worse. This rearranges the timer tick init function to initalize the handler before we set up the MFGPT clock to make sure that even if we get an event, it will go to the handler. Furthermore, in the handler we need to make sure that we clear the event, even if the timer isn't running. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Tested-by: Arnd Hannemann <hannemann@i4.informatik.rwth-aachen.de>
* Fix file references in documentation and KconfigJohann Felix Soden2008-01-221-1/+1
| | | | | | | | | | | | | | Fix typo in arch/powerpc/boot/flatdevtree_env.h. There is no Documentation/networking/ixgbe.txt. README.cycladesZ is now in Documentation/. wavelan.p.h is now in drivers/net/wireless/. HFS.txt is now Documentation/filesystems/hfs.txt. OSS-files are now in sound/oss/. Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Revert "x86: fix NMI watchdog & 'stopped time' problem"Thomas Gleixner2008-01-222-17/+4
| | | | | | | | | | | | | | | | This reverts commit d4d25deca49ec2527a634557bf5a6cf449f85deb. It tried to fix long standing bugzilla entries, but the solution was reported to break other systems. The reporter of http://bugzilla.kernel.org/show_bug.cgi?id=9791 tracked it down to this commit and confirmed that reverting the patch restores the correct behaviour. It's too late in the release cycle to find a better solution than reverting the commit to avoid regressions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2008-01-222-3/+3
|\ | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: tc35815: Use irq number for tc35815-mac platform device id [MIPS] Malta: Fix reading the PCI clock frequency on big-endian [MIPS] SMTC: Fix build error.
| * tc35815: Use irq number for tc35815-mac platform device idAtsushi Nemoto2008-01-221-2/+2
| | | | | | | | | | | | | | | | | | | | The tc35815-mac platform device used a pci bus number and a devfn to identify its target device, but the pci bus number may vary if some bus-bridges are found. Use irq number which is be unique for embedded controllers. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] Malta: Fix reading the PCI clock frequency on big-endianDmitri Vorobiev2008-01-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The JMPRS register on Malta boards keeps a 32-bit CPU-endian value. The readw() function assumes that the value it reads is a little-endian 16-bit number. Therefore, using readw() to obtain the value of the JMPRS register is a mistake. This error leads to incorrect reading of the PCI clock frequency on big-endian during board start-up. Change readw() to __raw_readl(). This was tested by injecting a call to printk() and verifying that the value of the jmpr variable was consistent with current setting of the JP4 "PCI CLK" jumper. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | CRIS: add missed local_irq_restore callCyrill Gorcunov2008-01-221-0/+1
| | | | | | | | | | | | | | | | Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@akpm@linux-foundation.org>
* | Merge branch 'omap-fixes' of ↵Russell King2008-01-203-18/+14
|\ \ | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'omap-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: ARM: OMAP1: Fix compile for board-nokia770 ARM: OMAP1: Keymap fix for f-sample and p2-sample
| * | ARM: OMAP1: Fix compile for board-nokia770Daniel Walker2008-01-191-2/+2
| | | | | | | | | | | | | | | | | | | | | Fix compile for board-nokia770 Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | ARM: OMAP1: Keymap fix for f-sample and p2-sampleVivek Kutal2008-01-192-16/+12
| | | | | | | | | | | | | | | | | | | | | Keymap fix for f-sample and p2-sample. Signed-off-by: Vivek Kutal <vivek.kutal@celunite.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* | | [ARM] 4748/1: dca: source drivers/dca/Kconfig in arch/arm/Kconfig to fix warningDan Williams2008-01-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'select' used by config symbol 'INTEL_IOATDMA' refers to undefined symbol 'DCA' Although drivers/dma is currently the only user future drivers outside of drivers/dma may select this option so it is better to add this to arch/arm/Kconfig than move DCA to drivers/dma/Kconfig. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | [ARM] pxa: don't rely on r2 being preserved over a function callRussell King2008-01-201-4/+2
| |/ |/| | | | | | | | | | | | | r2 is not guaranteed to be preserved over a function call, so relying on it to store the link register over the call to sleep_phys_sp() is unreliable. Store the link register on the stack instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | arch: Ignore arch/i386 and arch/x86_64Josef 'Jeff' Sipek2008-01-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | The i386 and x86_64 arch directories contain nothing but a generated symlink to arch/x86/boot/bzImage when a tree a built. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Anvin <hpa@zytor.com> Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | x86: add support for the latest Intel processors to OprofileArjan van de Ven2008-01-181-1/+1
| | | | | | | | | | | | | | | | | | | | The latest Intel processors (the 45nm ones) have a model number of 23 (old ones had 15); they're otherwise compatible on the oprofile side. This patch adds the new model number to the oprofile code. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-01-182-0/+6
|\ \ | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix hypervisor TLB operation error reporting.
| * | [SPARC64]: Fix hypervisor TLB operation error reporting.David S. Miller2008-01-172-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Trap level wasn't being passed down properly, we need to move it from %l4 into the correct outgoing arg register. 2) Although the TPC often provides the most direct clue, we have the caller PC so we should provide that as well. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | alpha: fix conversion from denormal float to doubleIvan Kokshaysky2008-01-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The trap handler does properly update the fraction, but not the exponent... Thanks to Paolo Bonzini for the bug report and the testcase. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Paolo Bonzini <bonzini@gnu.org> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | CRIS v10: vmlinux.lds.S: ix kernel oops on boot and use common definesJesper Nilsson2008-01-181-18/+15
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Move alignment to page size of init data outside ifdef for BLK_DEV_INITRD. The reservation up to page size of memory after init data was previously not done if BLK_DEV_INITRD was undefined. This caused a kernel oops when init memory pages were freed after startup, data placed in the same page as the last init memory would also be freed and reused, with disastrous results. - Use macros for initcalls and .text sections. - Replace hardcoded page size constant with PAGE_SIZE define. - Change include/asm-cris/page.h to use the _AC macro to instead of testing __ASSEMBLY__. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Mikael Starvik <mikael.starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* / lockdep: more hardirq annotations for notify_die()Peter Zijlstra2008-01-162-0/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Sat, 2007-12-29 at 18:06 +0100, Marcin Slusarz wrote: > Hi > Today I've got this (while i was upgrading my gentoo box): > > WARNING: at kernel/lockdep.c:2658 check_flags() > Pid: 21680, comm: conftest Not tainted 2.6.24-rc6 #63 > > Call Trace: > [<ffffffff80253457>] check_flags+0x1c7/0x1d0 > [<ffffffff80257217>] lock_acquire+0x57/0xc0 > [<ffffffff8024d5c0>] __atomic_notifier_call_chain+0x60/0xd0 > [<ffffffff8024d641>] atomic_notifier_call_chain+0x11/0x20 > [<ffffffff8024d67e>] notify_die+0x2e/0x30 > [<ffffffff8020da0a>] do_divide_error+0x5a/0xa0 > [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a > [<ffffffff80255b89>] trace_hardirqs_on+0xd9/0x180 > [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a > [<ffffffff80523c2d>] error_exit+0x0/0xa9 > > possible reason: unannotated irqs-off. > irq event stamp: 4693 > hardirqs last enabled at (4693): [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a > hardirqs last disabled at (4692): [<ffffffff80522c17>] trace_hardirqs_off_thunk+0x35/0x37 > softirqs last enabled at (3546): [<ffffffff80238343>] __do_softirq+0xb3/0xd0 > softirqs last disabled at (3521): [<ffffffff8020c97c>] call_softirq+0x1c/0x30 more early fixups for notify_die().. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [IA64] Fix unaligned handler for floating point instructions with base updateLuck, Tony2008-01-151-4/+7
| | | | | | | | | | | | | | | | | | | | | | The compiler team did the hard work for this distilling a problem in large fortran application which showed up when applied to a 290MB input data set down to this instruction: ldfd f34=[r17],-8 Which they noticed incremented r17 by 0x10 rather than decrementing it by 8 when the value in r17 caused an unaligned data fault. I tracked it down to some bad instruction decoding in unaligned.c. The code assumes that the 'x' bit can determine whether the instruction is an "ldf" or "ldfp" ... which it is for opcode=6 (see table 4-29 on page 3:302 of the SDM). But for opcode=7 the 'x' bit is irrelevent, all variants are "ldf" instructions (see table 4-36 on page 3:306). Note also that interpreting the instruction as "ldfp" means that the "paired" floating point register (f35 in the example here) will also be corrupted. Signed-off-by: Tony Luck <tony.luck@intel.com>
* Fix Blackfin HARDWARE_PM supportMathieu Desnoyers2008-01-151-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch restores the blackfin Hardware Performance Monitor Profiling support that was killed by the combining of instrumentation menus in commit 09cadedbdc01f1a4bea1f427d4fb4642eaa19da9. Since there seems to be no good reason to behave differently from other architectures, it now automatically selects the hardware performance counters whenever the profiling is activated. mach-common/irqpanic.c: pm_overflow calls pm_overflow_handler which is in oprofile/op_model_bf533.c. I doubt that setting HARDWARE_PM as "m" will work at all, since the pm_overflow_handler should be in the core kernel image because it is called by irqpanic.c. Therefore, I change HARDWARE_PM from a tristate to a bool. The whole arch/$(ARCH)/oprofile/ is built depending on CONFIG_OPROFILE. Since part of the HARDWARE_PM support files sits in this directory, it makes sense to also depend on OPROFILE, not only PROFILING. Since OPROFILE already depends on PROFILING, it is correct to only depend on OPROFILE only. Thanks to Adrian Bunk for finding this bug and providing an initial patch. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: Adrian Bunk <adrian.bunk@movial.fi> CC: Randy Dunlap <randy.dunlap@oracle.com> CC: bryan.wu@analog.com Acked-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix ARM profiling/instrumentation configurationLinus Torvalds2008-01-152-1/+53
| | | | | | | | | | | | | | | | | | | Commit 09cadedbdc01f1a4bea1f427d4fb4642eaa19da9 ("Combine instrumentation menus in kernel/Kconfig.instrumentation") broke ARM profiling support, since ARM has some extra Kconfig options and doesn't just use the common OPROFILE/KPROBES config options. Rather than just revert the thing outright, or add ARM-specific knowledge to the generic Kconfig.instrumentation file (where the only and whole point was to be generic, not too architecture-specific), this just makes ARM not use the generic version, since it doesn't suit it. So create an arm-specific version of Kconfig.instrumentation instead, and use that. Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Russell King <rmk+lkml@arm.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds2008-01-152-3/+8
|\ | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: fix RTC_AIE with CONFIG_HPET_EMULATE_RTC x86: asm-x86/msr.h: pull in linux/types.h x86: fix boot crash on HIGHMEM4G && SPARSEMEM
| * x86: fix RTC_AIE with CONFIG_HPET_EMULATE_RTCBernhard Walle2008-01-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the current code, RTC_AIE doesn't work if the RTC relies on CONFIG_HPET_EMULATE_RTC because the code sets the RTC_AIE flag in hpet_set_rtc_irq_bit(). The interrupt handles does accidentally check for RTC_PIE and not RTC_AIE when comparing the time which was set in hpet_set_alarm_time(). I now verified on a test system here that without the patch applied, the attached test program fails on a system that has HPET with 2.6.24-rc7-default. That's not critical since I guess the problem has been there for several kernel releases, but as the fix is quite obvious. Configuration is CONFIG_RTC=y and CONFIG_HPET_EMULATE_RTC=y. Signed-off-by: Bernhard Walle <bwalle@suse.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: fix boot crash on HIGHMEM4G && SPARSEMEMIngo Molnar2008-01-151-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Denys Fedoryshchenko reported a bootup crash when he upgraded his system from 3GB to 4GB RAM: http://lkml.org/lkml/2008/1/7/9 the bug is due to HIGHMEM4G && SPARSEMEM kernels making pfn_to_page() to return an invalid pointer when the pfn is in a memory hole. The 256 MB PCI aperture at the end of RAM was not mapped by sparsemem, and hence the pfn was not valid. But set_highmem_pages_init() iterated this range without checking the pfn's validity first. this bug was probably present in the sparsemem code ever since sparsemem has been introduced in v2.6.13. It was masked due to HIGHMEM64G using larger memory regions in sparsemem_32.h: #ifdef CONFIG_X86_PAE #define SECTION_SIZE_BITS 30 #define MAX_PHYSADDR_BITS 36 #define MAX_PHYSMEM_BITS 36 #else #define SECTION_SIZE_BITS 26 #define MAX_PHYSADDR_BITS 32 #define MAX_PHYSMEM_BITS 32 #endif which creates 1GB sparsemem regions instead of 64MB sparsemem regions. So in practice we only ever created true sparsemem holes on x86 with HIGHMEM4G - but that was rarely used by distros. ( btw., we could probably save 2MB of mem_map[]s on X86_PAE if we reduced the sparsemem region size to 256 MB. ) Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Thomas Gleixner <tglx@linutronix.de>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-01-152-2/+13
|\ \ | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix build with SPARSEMEM_VMEMMAP disabled. [SPARC]: Make gettimeofday() monotonic again.
| * | [SPARC64]: Fix build with SPARSEMEM_VMEMMAP disabled.David S. Miller2008-01-131-1/+5
| | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SPARC]: Make gettimeofday() monotonic again.David S. Miller2008-01-131-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we switched away from the optimized C version things stopped being monotonic. The problem is that if we run this with interrupts disabled, we can see the interrupt pending because the counter reached the limit value. When this happens the counter has bit 31 set, and the low bits start counting again from zero. Reported by Martin Habets. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge branch 'merge' of ↵Linus Torvalds2008-01-153-12/+16
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix boot failure on POWER6 [POWERPC] Workaround for iommu page alignment
| * | [POWERPC] Fix boot failure on POWER6Paul Mackerras2008-01-152-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 473980a99316c0e788bca50996375a2815124ce1 added a call to clear the SLB shadow buffer before registering it. Unfortunately this means that we clear out the entries that slb_initialize has previously set in there. On POWER6, the hypervisor uses the SLB shadow buffer when doing partition switches, and that means that after the next partition switch, each non-boot CPU has no SLB entries to map the kernel text and data, which causes it to crash. This fixes it by reverting most of 473980a9 and instead clearing the 3rd entry explicitly in slb_initialize. This fixes the problem that 473980a9 was trying to solve, but without breaking POWER6. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Workaround for iommu page alignmentBenjamin Herrenschmidt2008-01-151-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 5d2efba64b231a1733c4048d1708d77e07f26426 changed our iommu code so that it always uses an iommu page size of 4kB. That means with our current code, drivers may do a dma_map_sg() of a 64kB page and obtain a dma_addr_t that is only 4k aligned. This works fine in most cases except for some infiniband HW it seems, where they tell the HW about the page size and it ignores the low bits of the DMA address. This works around it by making our IOMMU code enforce a PAGE_SIZE alignment for mappings of objects that are page aligned in the first place and whose size is larger or equal to a page. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2008-01-153-1/+8
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Cacheops.h: Fix typo. [MIPS] Cobalt: Qube1 has no serial port so don't use it [MIPS] Cobalt: Fix ethernet interrupts for RaQ1 [MIPS] Kconfig fixes for BCM47XX platform
| * | [MIPS] Cobalt: Qube1 has no serial port so don't use itThomas Bogendoerfer2008-01-151-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because Qube1 doesn't have a serial chip waiting for transmit fifo empty takes forever, which isn't a good idea. No prom_putchar/early console for Qube1 fixes this. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Cobalt: Fix ethernet interrupts for RaQ1Thomas Bogendoerfer2008-01-151-1/+1
| | | | | | | | | | | | | | | | | | | | | RAQ1 uses the same interrupt routing as Qube2. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Kconfig fixes for BCM47XX platformAurelien Jarno2008-01-151-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch below fixes two problems for Kconfig on the BCM47xx platform: - arch/mips/bcm47xx/gpio.c uses ssb_extif_* functions. Selecting SSB_DRIVER_EXTIF makes sure those functions are available. - arch/mips/pci/pci.c needs, when enabled, platform specific functions, which are defined when SSB_PCICORE_HOSTMODE is enabled. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | CRIS v10: driver for ds1302 needs to include cris-specific i2c.hJesper Nilsson2008-01-141-128/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes compilation error where i2c_init wasn't defined. Also, remove the CVS log and version tags, they are no longer useful. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <mikael.starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | CRIS v10: kernel/time.c needs to include linux/vmstat.h to compileJesper Nilsson2008-01-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes compile error when nr_free_pages() from linux/swap.h expands to global_page_state(NR_FREE_PAGES), but linux/vmstat.h isn't included to declare global_page_state(). Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <mikael.starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | CRIS v10: correct do_signal to fix oops and clean up signal handling in generalJesper Nilsson2008-01-141-139/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a kernel panic on boot due to do_signal not being compatible with it's callers. - do_signal now returns void, and does not have the previous signal set as a parameter. - Remove sys_rt_sigsuspend, we can use the common one instead. - Change sys_sigsuspend to be more like x86, don't call do_signal here. - handle_signal, setup_frame and setup_rt_frame now return -EFAULT if we've delivered a segfault, which is used by callers to perform necessary cleanup. - Break long lines, correct whitespace and formatting errors. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <mikael.starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Kick CPUS that might be sleeping in cpus_idle_waitSteven Rostedt2008-01-142-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sometimes cpu_idle_wait gets stuck because it might miss CPUS that are already in idle, have no tasks waiting to run and have no interrupts going to them. This is common on bootup when switching cpu idle governors. This patch gives those CPUS that don't check in an IPI kick. Background: ----------- I notice this while developing the mcount patches, that every once in a while the system would hang. Looking deeper, the hang was always at boot up when registering init_menu of the cpu_idle menu governor. Talking with Thomas Gliexner, we discovered that one of the CPUS had no timer events scheduled for it and it was in idle (running with NO_HZ). So the CPU would not set the cpu_idle_state bit. Hitting sysrq-t a few times would eventually route the interrupt to the stuck CPU and the system would continue. Note, I would have used the PDA isidle but that is set after the cpu_idle_state bit is cleared, and would leave a window open where we may miss being kicked. hmm, looking closer at this, we still have a small race window between clearing the cpu_idle_state and disabling interrupts (hence the RFC). CPU0: CPU 1: --------- --------- cpu_idle_wait(): cpu_idle(): | __cpu_cpu_var(is_idle) = 1; | if (__get_cpu_var(cpu_idle_state)) /* == 0 */ per_cpu(cpu_idle_state, 1) = 1; | if (per_cpu(is_idle, 1)) /* == 1 */ | smp_call_function(1) | | receives ipi and runs do_nothing. wait on map == empty idle(); /* waits forever */ So really we need interrupts off for most of this then. One might think that we could simply clear the cpu_idle_state from do_nothing, but I'm assuming that cpu_idle governors can be removed, and this might cause a race that a governor might be used after the module was removed. Venki said: I think your RFC patch is the right solution here. As I see it, there is no race with your RFC patch. As long as you call a dummy smp_call_function on all CPUs, we should be OK. We can get rid of cpu_idle_state and the current wait forever logic altogether with dummy smp_call_function. And so there wont be any wait forever scenario. The whole point of cpu_idle_wait() is to make all CPUs come out of idle loop atleast once. The caller will use cpu_idle_wait something like this. // Want to change idle handler - Switch global idle handler to always present default_idle - call cpu_idle_wait so that all cpus come out of idle for an instant and stop using old idle pointer and start using default idle - Change the idle handler to a new handler - optional cpu_idle_wait if you want all cpus to start using the new handler immediately. Maybe the below 1s patch is safe bet for .24. But for .25, I would say we just replace all complicated logic by simple dummy smp_call_function and remove cpu_idle_state altogether. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2008-01-132-3/+13
|\ \ \ | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] vfp: fix fuitod/fsitod instructions [ARM] pxa: silence warnings from cpu_is_xxx() macros
| * | | [ARM] vfp: fix fuitod/fsitod instructionsRussell King2008-01-102-3/+13
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | These two instructions exceptionally take a single precision register as their operand. This means we can't use vfp_get_dm() to read the register number - we need to use vfp_get_sm() instead. Add a flag to indicate this exception to the general rule. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | Merge branch 'merge' of ↵Linus Torvalds2008-01-134-0/+50
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix CPU hotplug when using the SLB shadow buffer [POWERPC] efika: add phy-handle property for fec_mpc52xx
| * | | [POWERPC] Fix CPU hotplug when using the SLB shadow bufferMichael Neuling2008-01-113-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before we register the SLB shadow buffer, we need to invalidate the entries in the buffer, otherwise we can end up stale entries from when we previously offlined the CPU. This does this invalidate as well as unregistering the buffer with PHYP before we offline the cpu. Tested and fixes crashes seen on 970MP (thanks to tonyb) and POWER5. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [POWERPC] efika: add phy-handle property for fec_mpc52xxOlaf Hering2008-01-101-0/+39
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new network driver fec_mpc52xx will not work on efika because the firmware does not provide all required properties. http://www.powerdeveloper.org/asset/by-id/46 has a Forth script to create more properties. But only the phy stuff is required to get a working network. This should go into the kernel because its appearently impossible to boot the script via tftp and then load the real boot binary (yaboot or zimage). Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | Merge branch 'release' of ↵Linus Torvalds2008-01-131-7/+3
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: pnpacpi: print resource shortage message only once PM: ACPI and APM must not be enabled at the same time ACPI: apply quirk_ich6_lpc_acpi to more ICH8 and ICH9 ACPICA: fix acpi_serialize hang regression ACPI : Not register gsi for PCI IDE controller in legacy mode ACPI: Reintroduce run time configurable max_cstate for !CPU_IDLE case ACPI: Make sysfs interface in ACPI power optional. ACPI: EC: Enable boot EC before bus_scan increase PNP_MAX_PORT to 40 from 24
| * | Pull bugzilla-9194 into release branchLen Brown2008-01-111-7/+3
| |\ \ | | |/ | |/|
| | * PM: ACPI and APM must not be enabled at the same timeLen Brown2008-01-111-7/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI and APM used "pm_active" to guarantee that they would not be simultaneously active. But pm_active was recently moved under CONFIG_PM_LEGACY, so that without CONFIG_PM_LEGACY, pm_active became a NOP -- allowing ACPI and APM to both be simultaneously enabled. This caused unpredictable results, including boot hangs. Further, the code under CONFIG_PM_LEGACY is scheduled for removal. So replace pm_active with pm_flags. pm_flags depends only on CONFIG_PM, which is present for both CONFIG_APM and CONFIG_ACPI. http://bugzilla.kernel.org/show_bug.cgi?id=9194 Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* | | [MIPS] Replace 40c7869b693b18412491fdcff64682215b739f9e kludgeAtsushi Nemoto2008-01-112-6/+3
| | | | | | | | | | | | | | | Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | [MIPS] Lasat: Fix built in separate object directory.WANG Cong2008-01-111-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> [Ralf: The LDSCRIPT script needed fixing, too] Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | [MIPS] Malta: Fix software reset on big endianDmitri Vorobiev2008-01-111-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I noticed that the commit f197465384bf7ef1af184c2ed1a4e268911a91e3 (MIPS Tech: Get rid of volatile in core code) broke the software reset functionality for MIPS Malta boards in big-endian mode. According to the MIPS Malta board user's manual, writing the magic 32-bit GORESET value into the SOFTRES register initiates board soft reset. My experimentation has shown that the endianness of the GORESET integer should thereby be the same as the endianness, which has been set for the CPU itself. The writew() function used to write the magic value in the code introduced by the commit mentioned above, however, swaps bytes for big-endian kernels and transfers 16 bits instead of 32. The patch below replaces the writew() function by the __raw_writel() routine, which leaves the byte order intact and transfers the whole MIPS machine word. Trivial code cleanup (replacing spaces by a tab and cutting oversized lines to make checkpatch.pl happy) is also included. The patch was tested using a Malta evaluation board running in both BE and LE modes. For both modes, software reset was fully functional after the change. P.S. I suspect that the same commit broke the "standby" functionality for MIPS Atlas boards. However, I did not touch the Atlas code as I don't have such board at my disposal and also because the linux-mips.org Web site claims that Atlas support is scheduled for removal. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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