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* kernel/cpu.c: create a CPU_STARTING cpu_chain notifierManfred Spraul2008-09-0814-0/+22
| | | | | | | | | | | | | | | | | Right now, there is no notifier that is called on a new cpu, before the new cpu begins processing interrupts/softirqs. Various kernel function would need that notification, e.g. kvm works around by calling smp_call_function_single(), rcu polls cpu_online_map. The patch adds a CPU_STARTING notification. It also adds a helper function that sends the message to all cpu_chain handlers. Tested on x86-64. All other archs are untested. Especially on sparc, I'm not sure if I got it right. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-09-069-55/+154
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: cpu_init(): fix memory leak when using CPU hotplug x86: pda_init(): fix memory leak when using CPU hotplug x86, xen: Use native_pte_flags instead of native_pte_val for .pte_flags x86: move mtrr cpu cap setting early in early_init_xxxx x86: delay early cpu initialization until cpuid is done x86: use X86_FEATURE_NOPL in alternatives x86: add NOPL as a synthetic CPU feature bit x86: boot: stub out unimplemented CPU feature words
| * x86: cpu_init(): fix memory leak when using CPU hotplugAndreas Herrmann2008-09-061-10/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Exception stacks are allocated each time a CPU is set online. But the allocated space is never freed. Thus with one CPU hotplug offline/online cycle there is a memory leak of 24K (6 pages) for a CPU. Fix is to allocate exception stacks only once -- when the CPU is set online for the first time. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: akpm@linux-foundation.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: pda_init(): fix memory leak when using CPU hotplugAndreas Herrmann2008-09-061-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | pda->irqstackptr is allocated whenever a CPU is set online. But it is never freed. This results in a memory leak of 16K for each CPU offline/online cycle. Fix is to allocate pda->irqstackptr only once. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: akpm@linux-foundation.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86, xen: Use native_pte_flags instead of native_pte_val for .pte_flagsEduardo Habkost2008-09-061-1/+1
| | | | | | | | | | | | | | | | | | Using native_pte_val triggers the BUG_ON() in the paravirt_ops version of pte_flags(). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: move mtrr cpu cap setting early in early_init_xxxxYinghai Lu2008-09-063-8/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Krzysztof Helt found MTRR is not detected on k6-2 root cause: we moved mtrr_bp_init() early for mtrr trimming, and in early_detect we only read the CPU capability from cpuid, so some cpu doesn't have that bit in cpuid. So we need to add early_init_xxxx to preset those bit before mtrr_bp_init for those earlier cpus. this patch is for v2.6.27 Reported-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: delay early cpu initialization until cpuid is doneKrzysztof Helt2008-09-061-2/+2
| | | | | | | | | | | | | | | | | | Move early cpu initialization after cpu early get cap so the early cpu initialization can fix up cpu caps. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: use X86_FEATURE_NOPL in alternativesH. Peter Anvin2008-09-051-23/+13
| | | | | | | | | | | | | | Use X86_FEATURE_NOPL to determine if it is safe to use P6 NOPs in alternatives. Also, replace table and loop with simple if statement. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * x86: add NOPL as a synthetic CPU feature bitH. Peter Anvin2008-09-053-2/+69
| | | | | | | | | | | | | | | | | | The long noops ("NOPL") are supposed to be detected by family >= 6. Unfortunately, several non-Intel x86 implementations, both hardware and software, don't obey this dictum. Instead, probe for NOPL directly by executing a NOPL instruction and see if we get #UD. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * x86: boot: stub out unimplemented CPU feature wordsH. Peter Anvin2008-09-051-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | The CPU feature detection code in the boot code is somewhat minimal, and doesn't include all possible CPUID words. In particular, it doesn't contain the code for CPU feature words 2 (Transmeta), 3 (Linux-specific), 5 (VIA), or 7 (scattered). Zero them out, so we can still set those bits as known at compile time; in particular, this allows creating a Linux-specific NOPL flag and have it required (and therefore resolvable at compile time) in 64-bit mode. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2008-09-061-6/+13
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: clocksource, acpi_pm.c: check for monotonicity clocksource, acpi_pm.c: use proper read function also in errata mode ntp: fix calculation of the next jiffie to trigger RTC sync x86: HPET: read back compare register before reading counter x86: HPET fix moronic 32/64bit thinko clockevents: broadcast fixup possible waiters HPET: make minimum reprogramming delta useful clockevents: prevent endless loop lockup clockevents: prevent multiple init/shutdown clockevents: enforce reprogram in oneshot setup clockevents: prevent endless loop in periodic broadcast handler clockevents: prevent clockevent event_handler ending up handler_noop
| * | x86: HPET: read back compare register before reading counterThomas Gleixner2008-09-061-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After fixing the u32 thinko I sill had occasional hickups on ATI chipsets with small deltas. There seems to be a delay between writing the compare register and the transffer to the internal register which triggers the interrupt. Reading back the value makes sure, that it hit the internal match register befor we compare against the counter value. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | x86: HPET fix moronic 32/64bit thinkoThomas Gleixner2008-09-061-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We use the HPET only in 32bit mode because: 1) some HPETs are 32bit only 2) on i386 there is no way to read/write the HPET atomic 64bit wide The HPET code unification done by the "moron of the year" did not take into account that unsigned long is different on 32 and 64 bit. This thinko results in a possible endless loop in the clockevents code, when the return comparison fails due to the 64bit/332bit unawareness. unsigned long cnt = (u32) hpet_read() + delta can wrap over 32bit. but the final compare will fail and return -ETIME causing endless loops. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | HPET: make minimum reprogramming delta usefulThomas Gleixner2008-09-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The minimum reprogramming delta was hardcoded in HPET ticks, which is stupid as it does not work with faster running HPETs. The C1E idle patches made this prominent on AMD/RS690 chipsets, where the HPET runs with 25MHz. Set it to 5us which seems to be a reasonable value and fixes the problems on the bug reporters machines. We have a further sanity check now in the clock events, which increases the delta when it is not sufficient. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Tested-by: Dmitry Nezhevenko <dion@inhex.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2008-09-069-31/+58
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Probe initrd header only if explicitly specified [MIPS] TX39xx: Add missing local_flush_icache_range initialization [MIPS] TXx9: Fix txx9_pcode initialization [MIPS] Fix WARNING: at kernel/smp.c:290 [MIPS] Fix data bus error recovery
| * | | [MIPS] Probe initrd header only if explicitly specifiedAtsushi Nemoto2008-09-052-15/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently init_initrd() probes initrd header at the last page of kernel image, but it is valid only if addinitrd was used. If addinitrd was not used, the area contains garbage so probing there might misdetect initrd header (magic number is not strictly robust). This patch introduces CONFIG_PROBE_INITRD_HEADER to explicitly enable this probing. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | [MIPS] TX39xx: Add missing local_flush_icache_range initializationAtsushi Nemoto2008-09-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commmit 59e39ecd933ba49eb6efe84cbfa5597a6c9ef18a ("Fix WARNING: at kernel/smp.c:290") introduced local_flush_icache_range but lacks initialization for some TX39 case. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | [MIPS] TXx9: Fix txx9_pcode initializationAtsushi Nemoto2008-09-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The txx9_pcode variable was introduced in commit fe1c2bc64f65003b39f331a8e4b0d15b235a4afd ("TXx9: Add 64-bit support") but was not initialized properly. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | [MIPS] Fix WARNING: at kernel/smp.c:290Thomas Bogendoerfer2008-09-056-14/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | trap_init issues flush_icache_range(), which uses ipi functions to get icache flushing done on all cpus. But this is done before interrupts are enabled and caused WARN_ON messages. This changeset introduces a new local_flush_icache_range() and uses it before interrupts (and additional CPUs) are enabled to avoid this problem. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | [MIPS] Fix data bus error recoveryThomas Bogendoerfer2008-09-051-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With -ffunction-section the entries in __dbe_table aren't no longer sorted, so the lookup of exception addresses in do_be() failed for some addresses. To avoid this we now sort __dbe_table. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-09-051-0/+8
|\ \ \ \ | | |_|/ | |/| | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: add io delay quirk for Presario F700
| * | | x86: add io delay quirk for Presario F700Chuck Ebbert2008-09-031-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Manually adding "io_delay=0xed" fixes system lockups in ioapic mode on this machine. System Information Manufacturer: Hewlett-Packard Product Name: Presario F700 (KA695EA#ABF) Base Board Information Manufacturer: Quanta Product Name: 30D3 Reference: https://bugzilla.redhat.com/show_bug.cgi?id=459546 Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | Merge git://git.infradead.org/~dwmw2/dwmw2-2.6.27Linus Torvalds2008-09-051-11/+14
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/~dwmw2/dwmw2-2.6.27: Revert "[ARM] use the new byteorder headers" Fix conditional export of kvh.h and a.out.h to userspace. [MTD] [NAND] tmio_nand: fix base address programming
| * | | | Revert "[ARM] use the new byteorder headers"David Woodhouse2008-09-051-11/+14
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit ae82cbfc8beaa69007aa09966d3983ac938c3577. It needs the new byteorder headers to be exported to userspace, and they aren't yet -- and probably shouldn't be, at this point in the 2.6.27 release cycle (or ever, for that matter). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | Merge branch 'sh/for-2.6.27' of ↵Linus Torvalds2008-09-0510-62/+42
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: i2c: fix i2c-sh_mobile timing issues sh64: resume_kernel fix for kernel oops built with CONFIG_BKL_PREEMPT=y. sh: resume_kernel fix for kernel oops built with CONFIG_BKL_PREEMPT=y. sh: fix semtimedop syscall sh: update AP325RXA defconfig sh: update Migo-R defconfig sh: fix platform_resource_setup_memory() section mismatch sh: fix kexec entry point for crash kernels sh: crash kernel resource fix sh: fix ptrace_64.c:user_disable_single_step() sh64: re-add the __strnlen_user() prototype
| * | | sh64: resume_kernel fix for kernel oops built with CONFIG_BKL_PREEMPT=y.Paul Mundt2008-09-051-10/+4
| | | | | | | | | | | | | | | | | | | | | | | | Follows the SH change. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: resume_kernel fix for kernel oops built with CONFIG_BKL_PREEMPT=y.Carmelo Amoroso2008-09-051-24/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a problem within the SH implementation of resume_kernel code, that implements in assembly the bulk of preempt_schedule_irq function without taking care of the extra code needed to handle the BKL preemptible. The patch basically consists of removing this asm code and calling the common C implementation (see kernel/sched.c) as other archs do. Another change is the missing 'cli' macro invocation at the beginning of the resume_kernel. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: fix semtimedop syscallYoshihiro Shimoda2008-08-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | fix the problem that cannot work semtimedop system call. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: update AP325RXA defconfigMagnus Damm2008-08-281-10/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates the AP325RXA defconfig to include the recently merged uio_pdrv_genirq driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: update Migo-R defconfigMagnus Damm2008-08-281-8/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates the MigoR defconfig to include the recently merged uio_pdrv_genirq driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: fix platform_resource_setup_memory() section mismatchMagnus Damm2008-08-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch kills a section mismatch for platform_resource_setup_memory(). Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: fix kexec entry point for crash kernelsMagnus Damm2008-08-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The crash kernel entry point is currently checked by the kexec kernel code and only physical addresses in the reserved memory window are accepted. This means that we can't pass P2 or P1 addresses as entry points in the case of crash kernels. This patch makes sure we can start crash kernels by adding support for physical address entry points. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: crash kernel resource fixMagnus Damm2008-08-281-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The reserved crash kernel memory range is currently missing from /proc/iomem. crashk_res is mistakenly setup after __add_active_range(). Reorder things to make sure the resource shows up in /proc/iomem. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: fix ptrace_64.c:user_disable_single_step()Adrian Bunk2008-08-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following compile error caused by commit c459dbf294b4a3d70490a468a7ca3907fb2c2f57 (sh: ptrace single stepping cleanups.): <-- snip --> ... CC arch/sh/kernel/ptrace_64.o arch/sh/kernel/ptrace_64.c: In function 'user_disable_single_step': arch/sh/kernel/ptrace_64.c:134: error: 'regs' undeclared (first use in this function) arch/sh/kernel/ptrace_64.c:134: error: (Each undeclared identifier is reported only once arch/sh/kernel/ptrace_64.c:134: error: for each function it appears in.) ... make[2]: *** [arch/sh/kernel/ptrace_64.o] Error 1 <-- snip --> Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh64: re-add the __strnlen_user() prototypeAdrian Bunk2008-08-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 42fd3b142d8867f5b58d6fb75592cd20fd654c1b (sh: Initial consolidation of the _32/_64 uaccess split.) mistakenly removed the sh64 __strnlen_user() prototype, resulting in the following compile error: <-- snip --> ... CC init/main.o In file included from include/linux/poll.h:13, from include/linux/rtc.h:113, from include/linux/efi.h:19, from init/main.c:43: arch/sh/include/asm/uaccess.h: In function 'strnlen_user': arch/sh/include/asm/uaccess.h:213: error: implicit declaration of function '__strnlen_user' ... make[2]: *** [init/main.o] Error 1 <-- snip --> Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | | | x86: Change warning message in TSC calibration.Alok N Kataria2008-09-031-2/+1
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When calibration against PIT fails, the warning that we print is misleading. In a virtualized environment the VM may get descheduled while calibration or, the check in PIT calibration may fail due to other virtualization overheads. The warning message explicitly assumes that calibration failed due to SMI's which may not be the case. Change that to something proper. Signed-off-by: Alok N Kataria <akataria@vmware.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'merge' of ↵Linus Torvalds2008-09-039-21/+31
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 for getting CPU number in power_save_ppc32_restore() powerpc: Fix build error with 64K pages and !hugetlbfs powerpc: Work around gcc's -fno-omit-frame-pointer bug powerpc: Make sure _etext is after all kernel text powerpc: Only make kernel text pages of linear mapping executable powerpc: Fix uninitialised variable in VSX alignment code
| * | powerpc: Fix for getting CPU number in power_save_ppc32_restore()Kumar Gala2008-09-032-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The calculation to get TI_CPU based off of SPRG3 was just plain wrong, meaning that we were getting garbage for the CPU number on 6xx/G3/G4 based SMP boxes in this code. Just offset off the stack pointer (to get to thread_info) like all the other references to TI_CPU do. This was pointed out by Chen Gong <G.Chen@freescale.com> [paulus@samba.org - use rlwinm r12,r11,... instead of rlwinm r12,r1,...; tophys()] Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | powerpc: Fix build error with 64K pages and !hugetlbfsBenjamin Herrenschmidt2008-09-031-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | HAVE_ARCH_UNMAPPED_AREA and HAVE_ARCH_UNMAPPED_AREA_TOPDOWN must be defined whenever CONFIG_PPC_MM_SLICES is enabled, not just when CONFIG_HUGETLB_PAGE is. They used to be always defined together but this is no longer the case since 3a8247cc2c856930f34eafce33f6a039227ee175 ("powerpc: Only demote individual slices rather than whole process"). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | powerpc: Work around gcc's -fno-omit-frame-pointer bugTony Breeds2008-09-033-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This bug is causing random crashes (http://bugzilla.kernel.org/show_bug.cgi?id=11414). -fno-omit-frame-pointer is only needed on powerpc when -pg is also supplied, and there is a gcc bug that causes incorrect code generation on 32-bit powerpc when -fno-omit-frame-pointer is used---it uses stack locations below the stack pointer, which is not allowed by the ABI because those locations can and sometimes do get corrupted by an interrupt. This ensures that CONFIG_FRAME_POINTER is only selected by ftrace. When CONFIG_FTRACE is enabled we also pass -mno-sched-epilog to work around the gcc codegen bug. Patch based on work by: Andreas Schwab <schwab@suse.de> Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | powerpc: Make sure _etext is after all kernel textStephen Rothwell2008-09-031-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This makes core_kernel_text() (and therefore kernel_text_address()) return the correct result. Currently all the __devinit routines (at least) will not be considered to be kernel text. This is just a quick fix for 2.6.27 - hopefully we will be able to fix this better in 2.6.28. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | powerpc: Only make kernel text pages of linear mapping executablePaul Mackerras2008-09-031-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit bc033b63bbfeb6c4b4eb0a1d083c650e4a0d2af8 ("powerpc/mm: Fix attribute confusion with htab_bolt_mapping()") moved the check for whether we should make pages of the linear mapping executable from htab_bolt_mapping into its callers, including htab_initialize. A side-effect of this is that the decision is now made once for each contiguous section in the LMB array rather than for each page individually. This can often mean that the whole of the linear mapping ends up being executable. This reverts to the previous behaviour, where individual pages are checked for being part of the kernel text or not, by moving the check back down into htab_bolt_mapping. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | powerpc: Fix uninitialised variable in VSX alignment codeMichael Neuling2008-09-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes an uninitialised variable in the VSX alignment code. It can cause warnings from GCC (noticed with gcc-4.1.1). Gcc is actually correct in this instance, and this bug could cause the alignment interrupt handler to send a SIGSEGV to the process on a legitimate access. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Split up PIT part of TSC calibration from native_calibrate_tscLinus Torvalds2008-09-031-61/+71
|/ / | | | | | | | | | | | | | | | | The TSC calibration function is still very complicated, but this makes it at least a little bit less so by moving the PIT part out into a helper function of its own. Tested-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-of-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [x86] Fix TSC calibration issuesThomas Gleixner2008-09-021-54/+181
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Larry Finger reported at http://lkml.org/lkml/2008/9/1/90: An ancient laptop of mine started throwing errors from b43legacy when I started using 2.6.27 on it. This has been bisected to commit bfc0f59 "x86: merge tsc calibration". The unification of the TSC code adopted mostly the 64bit code, which prefers PMTIMER/HPET over the PIT calibration. Larrys system has an AMD K6 CPU. Such systems are known to have PMTIMER incarnations which run at double speed. This results in a miscalibration of the TSC by factor 0.5. So the resulting calibrated CPU/TSC speed is half of the real CPU speed, which means that the TSC based delay loop will run half the time it should run. That might explain why the b43legacy driver went berserk. On the other hand we know about systems, where the PIT based calibration results in random crap due to heavy SMI/SMM disturbance. On those systems the PMTIMER/HPET based calibration logic with SMI detection shows better results. According to Alok also virtualized systems suffer from the PIT calibration method. The solution is to use a more wreckage aware aproach than the current either/or decision. 1) reimplement the retry loop which was dropped from the 32bit code during the merge. It repeats the calibration and selects the lowest frequency value as this is probably the closest estimate to the real frequency 2) Monitor the delta of the TSC values in the delay loop which waits for the PIT counter to reach zero. If the maximum value is significantly different from the minimum, then we have a pretty safe indicator that the loop was disturbed by an SMI. 3) keep the pmtimer/hpet reference as a backup solution for systems where the SMI disturbance is a permanent point of failure for PIT based calibration 4) do the loop iteration for both methods, record the lowest value and decide after all iterations finished. 5) Set a clear preference to PIT based calibration when the result makes sense. The implementation does the reference calibration based on HPET/PMTIMER around the delay, which is necessary for the PIT anyway, but keeps separate TSC values to ensure the "independency" of the resulting calibration values. Tested on various 32bit/64bit machines including Geode 266Mhz, AMD K6 (affected machine with a double speed pmtimer which I grabbed out of the dump), Pentium class machines and AMD/Intel 64 bit boxen. Bisected-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: atari_keyb_init operator precedence fixMichael Schmitz2008-09-021-3/+6
| | | | | | | | | | | | | | | | Fix operator precedence bug in atari_keyb_init, which caused a failure on CT60 Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | fix typo in arch/parisc/hpux/fs.cStephen Rothwell2008-09-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A parisc allmodconfig build produces this: arch/parisc/hpux/fs.c:107: error: 'buffer' undeclared (first use in this function) Introduced by commit da574983de9f9283ba35662c8723627096e160de ("[PATCH] fix hpux_getdents()"). Helge Dille also reported this in bugzilla 11461: http://bugzilla.kernel.org/show_bug.cgi?id=11461 and he posted an identical patch. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-09-026-32/+62
|\ \ | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: setup_valid_addr_bitmap_from_pavail() should be __init sparc: Fix resource flags for PCI children in OF device tree. sparc32: Implement smp_call_function_single().
| * | sparc64: setup_valid_addr_bitmap_from_pavail() should be __initDavid S. Miller2008-08-301-1/+1
| | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * | sparc: Fix resource flags for PCI children in OF device tree.David S. Miller2008-08-282-11/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a device is under an EBUS or ISA bus, the resource flags don't get set properly. Fix this by re-evaluating the resource flags at each level of bus as we apply ranges on the way to the root. And let PCI override any existing flags setting, but don't let the default flags calculator make such overrides. Signed-off-by: David S. Miller <davem@davemloft.net>
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