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* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2007-01-084-4/+61
|\ | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] Provide basic printk_clock() implementation [ARM] Resolve fuse and direct-IO failures due to missing cache flushes [ARM] pass vma for flush_anon_page() [ARM] Fix potential MMCI bug [ARM] Fix kernel-mode undefined instruction aborts [ARM] 4082/1: iop3xx: fix iop33x gpio register offset [ARM] 4070/1: arch/arm/kernel: fix warnings from missing includes [ARM] 4079/1: iop: Update MAINTAINERS
| * [ARM] Provide basic printk_clock() implementationRussell King2007-01-081-0/+11
| | | | | | | | | | | | | | | | | | Current sched_clock() implementations on ARM cause unbootable kernels with PRINTK_TIME support enabled. To avoid this, provide a basic printk_clock() implementation which avoids sched_clock() being called before the page tables have been set up. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Resolve fuse and direct-IO failures due to missing cache flushesRussell King2007-01-081-0/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fuse does not work on ARM due to cache incoherency issues - fuse wants to use get_user_pages() to copy data from the current process into kernel space. However, since this accesses userspace via the kernel mapping, the kernel mapping can be out of date wrt data written to userspace. This can lead to unpredictable behaviour (in the case of fuse) or data corruption for direct-IO. This resolves debian bug #402876 Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Fix kernel-mode undefined instruction abortsRussell King2007-01-061-4/+8
| | | | | | | | | | | | | | | | | | If the kernel attempts to execute a CP1 or CP2 instruction and it aborts, and a FP emulator is not loaded, we try to return as if to a user context, instead of the proper kernel context. Since the fault came from kernel mode, we must use the kernel return paths. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 4070/1: arch/arm/kernel: fix warnings from missing includesBen Dooks2007-01-062-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | Include <asm/io.h> to fix the warning: arch/arm/kernel/traps.c:647:6: warning: symbol '__readwrite_bug' was not declared. Should it be static? Include <linux/mc146818rtc.h> to fix the warning: arch/arm/kernel/time.c:42:1: warning: symbol 'rtc_lock' was not declared. Should it be static? Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Revert "[PATCH] x86-64: Try multiple timer variants in check_timer"Linus Torvalds2007-01-082-51/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit b026872601976f666bae77b609dc490d1834bf77, which has been linked to several problem reports with IO-APIC and the timer. Machines either don't boot because the timer doesn't happen, or we get double timer interrupts because we end up double-routing the timer irq through multiple interfaces. See for example http://lkml.org/lkml/2006/12/16/101 http://lkml.org/lkml/2007/1/3/9 http://bugzilla.kernel.org/show_bug.cgi?id=7789 about some of the discussion. Patches to fix this cleanup exist (and have been confirmed to work fine at least for some of the affected cases) and we'll revisit it for 2.6.21, but this late in the -rc series we're better off just reverting the incomplete commit that caused the problems. Suggested-by: Adrian Bunk <bunk@stusta.de> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Yinghai Lu <yinghai.lu@amd.com> Cc: Andrew Morton <akpm@osdl.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: modpost smpboot code warning fixVivek Goyal2007-01-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | o Currently synchronize_tsc_ap() is of type __init. It is called by smp_callin() which is of type __cpuinit. So synchronize_tsc_ap() should be of type __cpuinit. o Modpost generates warnings for i386 if CONFIG_RELOCATABLE=y and CONFIG_HOTPLUG_CPU=y WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between 'start_secondary' (at offset 0xc01164dc) and 'initialize_secondary' WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between 'start_secondary' (at offset 0xc01164e8) and 'initialize_secondary' o tsc is of type __initdata. It should be of type __cpuinitdata. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: fix another modpost warningVivek Goyal2007-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | o MODPOST generates warning for i386 if kernel is compiled with CONFIG_RELOCATABLE=y WARNING: vmlinux - Section mismatch: reference to .init.data: from .data between 'this_cpu' (at offset 0xc05194d0) and 'cpuinfo_op' o this_cpu pointer should be of type __cpuinitdata. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: fix modpost warning in SMP trampoline codeVivek Goyal2007-01-051-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | o MODPOST generates warning for i386 if kernel is compiled with CONFIG_RELOCATABLE=y WARNING: vmlinux - Section mismatch: reference to .init.text:startup_32_smp from .data between 'trampoline_data' (at offset 0xc0519cf8) and 'boot_gdt' o trampoline code/data can go into init section is CPU hotplug is not enabled. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: Restore CONFIG_PHYSICAL_START optionVivek Goyal2007-01-051-0/+41
|/ | | | | | | | | | | | | | | | | | o Relocatable bzImage support had got rid of CONFIG_PHYSICAL_START option thinking that now this option is not required as people can build a second kernel as relocatable and load it anywhere. So need of compiling the kernel for a custom address was gone. But Magnus uses vmlinux images for second kernel in Xen environment and he wants to continue to use it. o Restoring the CONFIG_PHYSICAL_START option for the time being. I think down the line we can get rid of it. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'release' of ↵Linus Torvalds2007-01-041-1/+1
|\ | | | | | | | | | | | | | | | | | | | | 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: ACPI: asus_acpi: new MAINTAINER ACPI: fix section mis-match build warning ACPI: increase ACPI_MAX_REFERENCE_COUNT for larger systems ACPI: EC: move verbose printk to debug build only backlight: fix backlight_device_register compile failures
| * ACPI: fix section mis-match build warningLen Brown2007-01-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Dunno why this pops out in only in the allmodconfig build. Though the warning is accurate, all the callers of the flagged non __init function are __init, this is not a functional change. WARNING: vmlinux - Section mismatch: reference to .init.data:acpi_sci_flags from .text between 'acpi_sci_ioapic_setup' (at offset 0xc010f0a 6) and 'acpi_gsi_to_irq' WARNING: vmlinux - Section mismatch: reference to .init.text:mp_override_legacy_irq from .text between 'acpi_sci_ioapic_setup' (at offset 0 xc010f0de) and 'acpi_gsi_to_irq' WARNING: vmlinux - Section mismatch: reference to .init.data:acpi_sci_override_gsi from .text between 'acpi_sci_ioapic_setup' (at offset 0x c010f0e4) and 'acpi_gsi_to_irq' Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds2007-01-034-74/+63
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] longhaul: Kill off warnings introduced by recent changes. [CPUFREQ] Uninitialized use of cmd.val in arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c:acpi_cpufreq_target() [CPUFREQ] Longhaul - Always guess FSB [CPUFREQ] Longhaul - Fix up powersaver assumptions. [CPUFREQ] longhaul: Fix up unreachable code. [CPUFREQ] speedstep-centrino: missing space and bracket [CPUFREQ] Bug fix for acpi-cpufreq and cpufreq_stats oops on frequency change notification [CPUFREQ] select consistently
| * | [CPUFREQ] longhaul: Kill off warnings introduced by recent changes.Dave Jones2007-01-021-4/+1
| | | | | | | | | | | | | | | | | | Bunch of unused vars + one case where gcc isn't smart enough. Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Uninitialized use of cmd.val in ↵Guillaume Chazarain2007-01-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c:acpi_cpufreq_target() cmd.val was used uninitialized on the line below. Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Longhaul - Always guess FSBRafa³ Bilski2007-01-021-30/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is patch that solves Ebox mini PC issue and make FSB code more specification compilant. At start guess_fsb function is guessing 200MHz FSB too. It is better to make it in this way because, thanks to this function, driver will fail for bogus FSB values caused by bogus multiplier value. For PowerSaver processors we can't depend on Max / MinMHzFSB because these values are only used for PowerSaver 2.0 and 3.0. Most processors on which Longhaul is used are PowerSaver 1.0 only. I'm changing code for older CPU's too, but not so much as previously, and this code was already used for Ezra. Using MinMHzBR for Ezra-T is outside spec. It is for voltage scaling purpose and don't have to be equal to minmult (but it is). Same for Nehemiah (it isn't for sure). Added mult - current multiplier value. Signed-off-by: Rafa³ Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Longhaul - Fix up powersaver assumptions.Rafa³ Bilski2006-12-291-33/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI PM2 register was fallback for "Longhaul ver. 1" CPU's. My assumption that this register isn't present at "PowerSaver" motherboards is so far true, but current code will not work correctly in other case. There are three possible supports: ACPI C3, PM2 and northbridge. That was my assumption that ACPI C3 and northbridge is for PS and northbridge and PM2 is for V1. In current code we can only check if it is ACPI support or not by port22_en. So remove port22_en and add longhaul_flags. If USE_ACPI_C3 and USE_NORTHBRIDGE are both clear then it means ACPI PM2 support. Also change order of support probe from ACPI C3, PM2, northbridge to ACPI C3, northbridge, ACPI PM2. Paranoid protection against port 0x22 cast as ACPI PM2 register. Bit 1 clear in such case - lockup on AGP DMA. And obvious (now) fixup for do_powersaver. Use cx->address only for ACPI C3 ("PowerSaver" processor using PM2 support). Signed-off-by: Rafa¿ Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] longhaul: Fix up unreachable code.Dave Jones2006-12-281-1/+1
| | | | | | | | | | | | | | | Signed-off-by: Rafał Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] speedstep-centrino: missing space and bracketBrice Goglin2006-12-221-3/+3
| | | | | | | | | | | | | | | | | | | | | A space and a bracket are missing (and indentation is wrong). Signed-off-by: Brice Goglin <Brice.Goglin@ens-lyon.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Bug fix for acpi-cpufreq and cpufreq_stats oops on frequency ↵Venkatesh Pallipadi2006-12-221-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | change notification Fixes the oops in cpufreq_stats with acpi_cpufreq driver. The issue was that the frequency was reported as 0 in acpi-cpufreq.c. The bug is due to different indicies for freq_table and ACPI perf table. Also adds a check in cpufreq_stats to check for error return from freq_table_get_index() and avoid using the error return value. Patch fixes the issue reported at http://www.ussg.iu.edu/hypermail/linux/kernel/0611.2/0629.html and also other similar issue here http://bugme.osdl.org/show_bug.cgi?id=7383 comment 53 Signed-off-by: Dhaval Giani <dhaval.giani@gmail.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] select consistentlyRandy Dunlap2006-12-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Make x86_64 ACPI_CPU_FREQ select CPU_FREQ_TABLE like other methods do. (although we should still eliminate as much use of 'select' as possible) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [PATCH] x86_64: Fix dump_trace()OGAWA Hirofumi2007-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | If caller passed the tsk, we should use it to validate a stack ptr. Otherwise, sysrq-t and other debugging stuff doesn't work. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2007-01-028-7/+59
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4081/1: Add definition for TI Sync Serial Protocol [ARM] 4080/1: Fix for the SSCR0_SlotsPerFrm macro [ARM] Fix VFP initialisation issue for SMP systems [ARM] 4078/1: Fix ARM copypage cache coherency problems [ARM] 4077/1: iop13xx: fix __io() macro [ARM] 4074/1: Flat loader stack alignment [ARM] 4073/1: Prevent s3c24xx drivers from including asm/arch/hardware.h and asm/arch/irqs.h [ARM] 4071/1: S3C24XX: Documentation update [ARM] 4066/1: correct a comment about PXA's sched_clock range [ARM] 4065/1: S3C24XX: dma printk fixes [ARM] 4064/1: make pxa_get_cycles() static [ARM] 4063/1: ep93xx: fix IRQ_EP93XX_GPIO?MUX numbering
| * | | [ARM] Fix VFP initialisation issue for SMP systemsRussell King2007-01-021-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we install the handlers for context switching, we must enable VFP on all CPU cores, otherwise undefined (and random) effects occur. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 4078/1: Fix ARM copypage cache coherency problemsRichard Purdie2006-12-303-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If PG_dcache_dirty is set for a page, we need to flush the source page before performing any copypage operation using a different virtual address. This fixes the copypage implementations for XScale, StrongARM and ARMv6. This patch fixes segmentation faults seen in the dynamic linker under the usage patterns in glibc 2.4/2.5. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 4077/1: iop13xx: fix __io() macroDan Williams2006-12-301-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since iop13xx defines the PCI I/O spaces with physical resource addresses the __io macro needs to perform the physical to virtual conversion. I incorrectly assumed that this would be handled by ioremap, but drivers (like e1000) directly dereference the address returned from __io. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 4066/1: correct a comment about PXA's sched_clock rangeNicolas Pitre2006-12-301-1/+3
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 4065/1: S3C24XX: dma printk fixesArnaud Patard2006-12-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 505788cccbb96cd496b646594c8a5fcdc26bc2d9 in linus kernel tree introduced some printks (for debugging ?) which are flooding the logs on my h1940. This patch replace them with pr_debug calls. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 4064/1: make pxa_get_cycles() staticNicolas Pitre2006-12-301-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | ... and fix a comment as well. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | [PATCH] Fix insta-reboot with "i386: Relocatable kernel support"Segher Boessenkool2007-01-021-1/+1
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 968de4f02621db35b8ae5239c8cfc6664fb872d8 ("i386: Relocatable kernel support") caused problems for people with old binutils versions that didn't mark ".text.*" sections automatically allocated. So we should use .section command to specifically mark .text.head section as AX (allocatable and executable) to solve the problem. This should be unnecessary with binutils 2.15 and later, which is already three years old, but it doesn't hurt supporting older toolchains where possible. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Acked-by: Jean Delvare <khali@linux-fr.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Revert "[PATCH] x86_64: fix boot hang caused by ↵Linus Torvalds2007-01-011-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CALGARY_IOMMU_ENABLED_BY_DEFAULT" This reverts commit a9622f6219ce58faba1417743bf3078501eb3434. Now that the Calgary code apparently detects itself properly, it's not needed any more. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [SPARC64]: Handle ISA devices with no 'regs' property.David S. Miller2006-12-311-12/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | And this points out that the return value from isa_dev_get_resource() and the 'pregs' arg to isa_dev_get_irq() are totally unused. Based upon a patch from Richard Mortimer <richm@oldelvet.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | [SPARC64]: Update defconfig.David S. Miller2006-12-311-8/+26
| | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | | [SPARC64]: Fix of_iounmap() region release.David S. Miller2006-12-312-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to pass in the resource otherwise we cannot release the region properly. We must know whether it is an I/O or MEM resource. Spotted by Eric Brower. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | [SPARC64]: Fix "mem=xxx" handling.David S. Miller2006-12-311-23/+124
| | | | | | | | | | | | | | | | | | | | | | | | We were not being careful enough. When we trim the physical memory areas, we have to make sure we don't remove the kernel image or initial ramdisk image ranges. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | [PATCH] sparc32: add offset in pci_map_sg()Jan Andersson2006-12-301-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add sg->offset to sg->dvma_address in pci_map_sg() on sparc32. Without the offset, transfers to buffers that do not begin on a page boundary will not work as expected. Signed-off-by: Jan Andersson <jan.andersson@ieee.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] ARM: OMAP: fix missing header on apollon boardKyungmin Park2006-12-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix apollon board compiler error Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] ARM: OMAP: fix GPMC compiler errorsKyungmin Park2006-12-301-13/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix GPMC compiler errors on OMAP2 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] make fn_keys work again on power/macbooksSoeren Sonnenburg2006-12-303-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The apple fn keys don't work anymore with 2.6.20-rc1. The reason is that USB_HID_POWERBOOK appears in several files although USB_HIDINPUT_POWERBOOK is the thing to be used. The patch fixes this. Cc: Greg KH <greg@kroah.com> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Add .gitignore file for relocs in arch/i386Thomas Meyer2006-12-301-0/+1
|/ / | | | | | | | | | | | | | | | | | | | | Due to the changes to make the kernel relocateable a new file is created during the build process. [jirislaby@gmail.com: The .gitigonre was intended to be in arch/ subtree] Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] arch/i386/pci/mmconfig.c tlb flush fixOGAWA Hirofumi2006-12-231-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We use the fixmap for accessing pci config space in pci_mmcfg_read/write(). The problem is in pci_exp_set_dev_base(). It is caching a last accessed address to avoid calling set_fixmap_nocache() whenever pci_mmcfg_read/write() is used. static inline void pci_exp_set_dev_base(int bus, int devfn) { u32 dev_base = base | (bus << 20) | (devfn << 12); if (dev_base != mmcfg_last_accessed_device) { mmcfg_last_accessed_device = dev_base; set_fixmap_nocache(FIX_PCIE_MCFG, dev_base); } } cpu0 cpu1 --------------------------------------------------------------------------- pci_mmcfg_read("device-A") pci_exp_set_dev_base() set_fixmap_nocache() pci_mmcfg_read("device-B") pci_exp_set_dev_base() set_fixmap_nocache() pci_mmcfg_read("device-B") pci_exp_set_dev_base() /* doesn't flush tlb */ But if cpus accessed the above order, the second pci_mmcfg_read() on cpu0 doesn't flush the TLB, because "mmcfg_last_accessed_device" is device-B. So, second pci_mmcfg_read() on cpu0 accesses a device-A via a previous TLB cache. This problem became the cause of several strange behavior. This patches fixes this situation by adds "mmcfg_last_accessed_cpu" check. [ Alternatively, we could make a per-cpu mapping area or something. Not that it's probably worth it, but if we wanted to avoid all locking and instead just disable preemption, that would be the way to go. --Linus ] Signed-off-by: OGAWA Hirofumi <hogawa@miraclelinux.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge branch 'release' of ↵Linus Torvalds2006-12-222-3/+23
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (68 commits) ACPI: replace kmalloc+memset with kzalloc ACPI: Add support for acpi_load_table/acpi_unload_table_id fbdev: update after backlight argument change ACPI: video: Add dev argument for backlight_device_register ACPI: Implement acpi_video_get_next_level() ACPI: Kconfig - depend on PM rather than selecting it ACPI: fix NULL check in drivers/acpi/osl.c ACPI: make drivers/acpi/ec.c:ec_ecdt static ACPI: prevent processor module from loading on failures ACPI: fix single linked list manipulation ACPI: ibm_acpi: allow clean removal ACPI: fix git automerge failure ACPI: ibm_acpi: respond to workqueue update ACPI: dock: add uevent to indicate change in device status ACPI: ec: Lindent once again ACPI: ec: Change #define to enums there possible. ACPI: ec: Style changes. ACPI: ec: Acquire Global Lock under EC mutex. ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead. ACPI: ec: Rename gpe_bit to gpe ...
| * | ACPI: replace kmalloc+memset with kzallocBurman Yan2006-12-201-3/+1
| | | | | | | | | | | | | | | Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | merge linus into test branchLen Brown2006-12-2025-661/+693
| |\ \
| * | | ACPI: fix git automerge failureLen Brown2006-12-161-1/+0
| | | | | | | | | | | | | | | | Signed-off-by: Len Brown <len.brown@intel.com>
| * | | Pull trivial into test branchLen Brown2006-12-162-0/+23
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/acpi/ec.c
| | * | | ACPI: acpi-cpufreq: remove unused data when !CONFIG_SMPAndrew Morton2006-10-211-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | acpi-cpufreq.c, speedstep-centrino.c: warning: 'sw_any_bug_dmi_table' defined but not used Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
| | * | | ACPI: uninline ACPI global locking functionsAndrew Morton2006-10-211-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Fixes a build problem with CONFIG_M386=y (include file dependencies get messy). - Share the implementation between x86 and x86_64 - These are too big to inline anyway. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | | | | [PATCH] sched: fix bad missed wakeups in the i386, x86_64, ia64, ACPI and ↵Ingo Molnar2006-12-224-5/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | APM idle code Fernando Lopez-Lezcano reported frequent scheduling latencies and audio xruns starting at the 2.6.18-rt kernel, and those problems persisted all until current -rt kernels. The latencies were serious and unjustified by system load, often in the milliseconds range. After a patient and heroic multi-month effort of Fernando, where he tested dozens of kernels, tried various configs, boot options, test-patches of mine and provided latency traces of those incidents, the following 'smoking gun' trace was captured by him: _------=> CPU# / _-----=> irqs-off | / _----=> need-resched || / _---=> hardirq/softirq ||| / _--=> preempt-depth |||| / ||||| delay cmd pid ||||| time | caller \ / ||||| \ | / IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup (try_to_wake_up) IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup <<...>-5856> (37 0) IRQ_19-1479 1D..1 0us : __trace_start_sched_wakeup (c01262ba 0 0) IRQ_19-1479 1D..1 0us : resched_task (try_to_wake_up) IRQ_19-1479 1D..1 0us : __spin_unlock_irqrestore (try_to_wake_up) ... <idle>-0 1...1 11us!: default_idle (cpu_idle) ... <idle>-0 0Dn.1 602us : smp_apic_timer_interrupt (c0103baf 1 0) ... <...>-5856 0D..2 618us : __switch_to (__schedule) <...>-5856 0D..2 618us : __schedule <<idle>-0> (20 162) <...>-5856 0D..2 619us : __spin_unlock_irq (__schedule) <...>-5856 0...1 619us : trace_stop_sched_switched (__schedule) <...>-5856 0D..1 619us : trace_stop_sched_switched <<...>-5856> (37 0) what is visible in this trace is that CPU#1 ran try_to_wake_up() for PID:5856, it placed PID:5856 on CPU#0's runqueue and ran resched_task() for CPU#0. But it decided to not send an IPI that no CPU - due to TS_POLLING. But CPU#0 never woke up after its NEED_RESCHED bit was set, and only rescheduled to PID:5856 upon the next lapic timer IRQ. The result was a 600+ usecs latency and a missed wakeup! the bug turned out to be an idle-wakeup bug introduced into the mainline kernel this summer via an optimization in the x86_64 tree: commit 495ab9c045e1b0e5c82951b762257fe1c9d81564 Author: Andi Kleen <ak@suse.de> Date: Mon Jun 26 13:59:11 2006 +0200 [PATCH] i386/x86-64/ia64: Move polling flag into thread_info_status During some profiling I noticed that default_idle causes a lot of memory traffic. I think that is caused by the atomic operations to clear/set the polling flag in thread_info. There is actually no reason to make this atomic - only the idle thread does it to itself, other CPUs only read it. So I moved it into ti->status. the problem is this type of change: if (!hlt_counter && boot_cpu_data.hlt_works_ok) { - clear_thread_flag(TIF_POLLING_NRFLAG); + current_thread_info()->status &= ~TS_POLLING; smp_mb__after_clear_bit(); while (!need_resched()) { local_irq_disable(); this changes clear_thread_flag() to an explicit clearing of TS_POLLING. clear_thread_flag() is defined as: clear_bit(flag, &ti->flags); and clear_bit() is a LOCK-ed atomic instruction on all x86 platforms: static inline void clear_bit(int nr, volatile unsigned long * addr) { __asm__ __volatile__( LOCK_PREFIX "btrl %1,%0" hence smp_mb__after_clear_bit() is defined as a simple compile barrier: #define smp_mb__after_clear_bit() barrier() but the explicit TS_POLLING clearing introduced by the patch: + current_thread_info()->status &= ~TS_POLLING; is not an atomic op! So the clearing of the TS_POLLING bit is freely reorderable with the reading of the NEED_RESCHED bit - and both now reside in different memory addresses. CPU idle wakeup very much depends on ordered memory ops, the clearing of the TS_POLLING flag must always be done before we test need_resched() and hit the idle instruction(s). [Symmetrically, the wakeup code needs to set NEED_RESCHED before it tests the TS_POLLING flag, so memory ordering is paramount.] Fernando's dual-core Athlon64 system has a sufficiently advanced memory ordering model so that it triggered this scenario very often. ( And it also turned out that the reason why these latencies never triggered on my testsystems is that i routinely use idle=poll, which was the only idle variant not affected by this bug. ) The fix is to change the smp_mb__after_clear_bit() to an smp_mb(), to act as an absolute barrier between the TS_POLLING write and the NEED_RESCHED read. This affects almost all idling methods (default, ACPI, APM), on all 3 x86 architectures: i386, x86_64, ia64. Signed-off-by: Ingo Molnar <mingo@elte.hu> Tested-by: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] ptrace: Fix EFL_OFFSET value according to i386 pda changesJeremy Fitzhardinge2006-12-221-11/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PDA patches introduced a bug in ptrace: it reads eflags from the wrong place on the target's stack, but writes it back to the correct place. The result is a corrupted eflags, which is most visible when it turns interrupts off unexpectedly. This patch fixes this by making the ptrace code a little less fragile. It changes [gs]et_stack_long to take a straightforward byte offset into struct pt_regs, rather than requiring all callers to do a sizeof(struct pt_regs) offset adjustment. This means that the eflag's offset (EFL_OFFSET) on the target stack can be simply computed with offsetof(). Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Frederik Deweerdt <deweerdt@free.fr> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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