aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/platform (follow)
AgeCommit message (Collapse)AuthorFilesLines
2014-02-14x86/efi: Check status field to validate BGRT headerMatt Fleming1-1/+1
Madper reported seeing the following crash, BUG: unable to handle kernel paging request at ffffffffff340003 IP: [<ffffffff81d85ba4>] efi_bgrt_init+0x9d/0x133 Call Trace: [<ffffffff81d8525d>] efi_late_init+0x9/0xb [<ffffffff81d68f59>] start_kernel+0x436/0x450 [<ffffffff81d6892c>] ? repair_env_string+0x5c/0x5c [<ffffffff81d68120>] ? early_idt_handlers+0x120/0x120 [<ffffffff81d685de>] x86_64_start_reservations+0x2a/0x2c [<ffffffff81d6871e>] x86_64_start_kernel+0x13e/0x14d This is caused because the layout of the ACPI BGRT header on this system doesn't match the definition from the ACPI spec, and so we get a bogus physical address when dereferencing ->image_address in efi_bgrt_init(). Luckily the status field in the BGRT header clearly marks it as invalid, so we can check that field and skip BGRT initialisation. Reported-by: Madper Xie <cxie@redhat.com> Suggested-by: Toshi Kani <toshi.kani@hp.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2014-02-14x86/efi: Fix 32-bit falloutBorislav Petkov3-3/+17
We do not enable the new efi memmap on 32-bit and thus we need to run runtime_code_page_mkexec() unconditionally there. Fix that. Reported-and-tested-by: Lejun Zhu <lejun.zhu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2014-02-05x86/efi: Allow mapping BGRT on x86-32Matt Fleming1-4/+6
CONFIG_X86_32 doesn't map the boot services regions into the EFI memory map (see commit 700870119f49 ("x86, efi: Don't map Boot Services on i386")), and so efi_lookup_mapped_addr() will fail to return a valid address. Executing the ioremap() path in efi_bgrt_init() causes the following warning on x86-32 because we're trying to ioremap() RAM, WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:102 __ioremap_caller+0x2ad/0x2c0() Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-0.rc5.git0.1.2.fc21.i686 #1 Hardware name: DellInc. Venue 8 Pro 5830/09RP78, BIOS A02 10/17/2013 00000000 00000000 c0c0df08 c09a5196 00000000 c0c0df38 c0448c1e c0b41310 00000000 00000000 c0b37bc1 00000066 c043bbfd c043bbfd 00e7dfe0 00073eff 00073eff c0c0df48 c0448ce2 00000009 00000000 c0c0df9c c043bbfd 00078d88 Call Trace: [<c09a5196>] dump_stack+0x41/0x52 [<c0448c1e>] warn_slowpath_common+0x7e/0xa0 [<c043bbfd>] ? __ioremap_caller+0x2ad/0x2c0 [<c043bbfd>] ? __ioremap_caller+0x2ad/0x2c0 [<c0448ce2>] warn_slowpath_null+0x22/0x30 [<c043bbfd>] __ioremap_caller+0x2ad/0x2c0 [<c0718f92>] ? acpi_tb_verify_table+0x1c/0x43 [<c0719c78>] ? acpi_get_table_with_size+0x63/0xb5 [<c087cd5e>] ? efi_lookup_mapped_addr+0xe/0xf0 [<c043bc2b>] ioremap_nocache+0x1b/0x20 [<c0cb01c8>] ? efi_bgrt_init+0x83/0x10c [<c0cb01c8>] efi_bgrt_init+0x83/0x10c [<c0cafd82>] efi_late_init+0x8/0xa [<c0c9bab2>] start_kernel+0x3ae/0x3c3 [<c0c9b53b>] ? repair_env_string+0x51/0x51 [<c0c9b378>] i386_start_kernel+0x12e/0x131 Switch to using early_memremap(), which won't trigger this warning, and has the added benefit of more accurately conveying what we're trying to do - map a chunk of memory. This patch addresses the following bug report, https://bugzilla.kernel.org/show_bug.cgi?id=67911 Reported-by: Adam Williamson <awilliam@redhat.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2014-01-31Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-19/+46
Pull core debug changes from Ingo Molnar: "This contains mostly kernel debugging related updates: - make hung_task detection more configurable to distros - add final bits for x86 UV NMI debugging, with related KGDB changes - update the mailing-list of MAINTAINERS entries I'm involved with" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: hung_task: Display every hung task warning sysctl: Add neg_one as a standard constraint x86/uv/nmi, kgdb/kdb: Fix UV NMI handler when KDB not configured x86/uv/nmi: Fix Sparse warnings kgdb/kdb: Fix no KDB config problem MAINTAINERS: Restore "L: linux-kernel@vger.kernel.org" entries
2014-01-29Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds5-11/+12
Pull intel MID cleanups from Peter Anvin: "Miscellaneous cleanups to the intel-mid code merged earlier in this merge window" * 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, intel-mid: Cleanup some platform code's header files x86, intel-mid: Add missing 'void' to functions without arguments x86: Don't add new __cpuinit users to Merrifield platform code x86: Don't introduce more __cpuinit users in intel_mid_weak_decls.h
2014-01-28x86, intel-mid: Cleanup some platform code's header filesDavid Cohen2-4/+5
platform_ipc.h and platform_msic.h are wrongly declaring functions as external and with 'weak' attribute. This patch does a cleanup on those header files. It should have no functional change. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1390950567-12821-1-git-send-email-david.a.cohen@linux.intel.com Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-25x86/uv/nmi, kgdb/kdb: Fix UV NMI handler when KDB not configuredMike Travis1-14/+42
Fix UV call into kgdb to depend only on whether KGDB is defined and not both KGDB and KDB. This allows the power nmi command to use the gdb remote connection if enabled. Note new action of 'kgdb' needs to be set as well to indicate user wants to wait for gdb to be connected. If it's set to 'kdb' then an error message is displayed if KDB is not configured. Also note that if both KGDB and KDB are enabled, then the action of 'kgdb' or 'kdb' has no affect on which is used. See the KGDB documentation for further information. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Hedi Berriche <hedi@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Link: http://lkml.kernel.org/r/20140114162551.635540667@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-25x86/uv/nmi: Fix Sparse warningsMike Travis1-5/+4
Make uv_register_nmi_notifier() and uv_handle_nmi_ping() static to address sparse warnings. Fix problem where uv_nmi_kexec_failed is unused when CONFIG_KEXEC is not defined. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Hedi Berriche <hedi@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Link: http://lkml.kernel.org/r/20140114162551.480872353@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-25kgdb/kdb: Fix no KDB config problemMike Travis1-1/+1
Some code added to the debug_core module had KDB dependencies that it shouldn't have. Move the KDB dependent REASON back to the caller to remove the dependency in the debug core code. Update the call from the UV NMI handler to conform to the new interface. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Hedi Berriche <hedi@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Link: http://lkml.kernel.org/r/20140114162551.318251993@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-24Merge tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds1-2/+1
Pull ACPI and power management updates from Rafael Wysocki: "As far as the number of commits goes, the top spot belongs to ACPI this time with cpufreq in the second position and a handful of PM core, PNP and cpuidle updates. They are fixes and cleanups mostly, as usual, with a couple of new features in the mix. The most visible change is probably that we will create struct acpi_device objects (visible in sysfs) for all devices represented in the ACPI tables regardless of their status and there will be a new sysfs attribute under those objects allowing user space to check that status via _STA. Consequently, ACPI device eject or generally hot-removal will not delete those objects, unless the table containing the corresponding namespace nodes is unloaded, which is extremely rare. Also ACPI container hotplug will be handled quite a bit differently and cpufreq will support CPU boost ("turbo") generically and not only in the acpi-cpufreq driver. Specifics: - ACPI core changes to make it create a struct acpi_device object for every device represented in the ACPI tables during all namespace scans regardless of the current status of that device. In accordance with this, ACPI hotplug operations will not delete those objects, unless the underlying ACPI tables go away. - On top of the above, new sysfs attribute for ACPI device objects allowing user space to check device status by triggering the execution of _STA for its ACPI object. From Srinivas Pandruvada. - ACPI core hotplug changes reducing code duplication, integrating the PCI root hotplug with the core and reworking container hotplug. - ACPI core simplifications making it use ACPI_COMPANION() in the code "glueing" ACPI device objects to "physical" devices. - ACPICA update to upstream version 20131218. This adds support for the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves debug facilities. From Bob Moore, Lv Zheng and Betty Dall. - Init code change to carry out the early ACPI initialization earlier. That should allow us to use ACPI during the timekeeping initialization and possibly to simplify the EFI initialization too. From Chun-Yi Lee. - Clenups of the inclusions of ACPI headers in many places all over from Lv Zheng and Rashika Kheria (work in progress). - New helper for ACPI _DSM execution and rework of the code in drivers that uses _DSM to execute it via the new helper. From Jiang Liu. - New Win8 OSI blacklist entries from Takashi Iwai. - Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava, Rashika Kheria, Tang Chen, Zhang Rui. - intel_pstate driver updates, including proper Baytrail support, from Dirk Brandewie and intel_pstate documentation from Ramkumar Ramachandra. - Generic CPU boost ("turbo") support for cpufreq from Lukasz Majewski. - powernow-k6 cpufreq driver fixes from Mikulas Patocka. - cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark Brown. - Assorted cpufreq drivers fixes and cleanups from Anson Huang, John Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh Kumar. - cpuidle cleanups from Bartlomiej Zolnierkiewicz. - Support for hibernation APM events from Bin Shi. - Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC disabled during thaw transitions from Bjørn Mork. - PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf Hansson. - PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente Kurusa, Rashika Kheria. - New tool for profiling system suspend from Todd E Brandt and a cpupower tool cleanup from One Thousand Gnomes" * tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits) thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412) cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ Documentation: cpufreq / boost: Update BOOST documentation cpufreq: exynos: Extend Exynos cpufreq driver to support boost cpufreq / boost: Kconfig: Support for software-managed BOOST acpi-cpufreq: Adjust the code to use the common boost attribute cpufreq: Add boost frequency support in core intel_pstate: Add trace point to report internal state. cpufreq: introduce cpufreq_generic_get() routine ARM: SA1100: Create dummy clk_get_rate() to avoid build failures cpufreq: stats: create sysfs entries when cpufreq_stats is a module cpufreq: stats: free table and remove sysfs entry in a single routine cpufreq: stats: remove hotplug notifiers cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly cpufreq: speedstep: remove unused speedstep_get_state platform: introduce OF style 'modalias' support for platform bus PM / tools: new tool for suspend/resume performance optimization ACPI: fix module autoloading for ACPI enumerated devices ACPI: add module autoloading support for ACPI enumerated devices ACPI: fix create_modalias() return value handling ...
2014-01-22x86, intel-mid: Add missing 'void' to functions without argumentsDavid Cohen2-4/+4
This patch adds missing 'void' to functions that doesn't receive arguments. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1390429369-13761-1-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-22x86: Don't add new __cpuinit users to Merrifield platform codePaul Gortmaker2-2/+2
Commit bc20aa48bbb3068224a1c91f8332971fdb689fad ("x86, intel-mid: Add Merrifield platform support") added new instances of __cpuinit usage. We removed this a couple versions ago; we now want to remove the compat no-op stubs. Introducing new users is not what we want to see at this point in time, as it will break once the stubs are gone. This also fixes an out of sync __init vs. __cpuinit -- as the former is real, and the latter is a no-op; hence it would have been a section mismatch. Cc: Fei Yang <fei.yang@intel.com> Cc: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1390412125-19439-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-22x86: Don't introduce more __cpuinit users in intel_mid_weak_decls.hPaul Gortmaker2-4/+4
Commit 85611e3febe78955a519f5f9eb47b941525c8c76 ("x86, intel-mid: Add Clovertrail platform support") added new instances of __cpuinit usage. We removed this a couple versions ago; we now want to remove the compat no-op stubs. Introducing new users is not what we want to see at this point in time, as it will break once the stubs are gone. Reported-by: kbuild test robot <fengguang.wu@intel.com> Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Cc: Fei Yang <fei.yang@intel.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1390412055-19341-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-20Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds13-49/+282
Pull Intel MID updates from Ingo Molnar: "This tree improves Intel MID (Mobile Internet Device) platform support: - Merrifield platform support (David Cohen) - Clovertrail platform support (Kuppuswamy Sathyanarayanan) - Various cleanups and fixes (David Cohen)" * 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, intel_mid: Replace memcpy with struct assignment x86, intel-mid: Return proper error code from get_gpio_by_name() x86, intel-mid: Check get_gpio_by_name() error code on platform code x86, intel-mid: sfi_handle_*_dev() should check for pdata error code x86, intel-mid: Remove deprecated X86_MDFLD and X86_WANT_INTEL_MID configs x86, intel-mid: Add Merrifield platform support x86, intel-mid: Add Clovertrail platform support x86, intel-mid: Move Medfield code out of intel-mid.c core file
2014-01-20Merge branch 'x86-efi-kexec-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds4-76/+465
Pull x86 EFI changes from Ingo Molnar: "This consists of two main parts: - New static EFI runtime services virtual mapping layout which is groundwork for kexec support on EFI (Borislav Petkov) - EFI kexec support itself (Dave Young)" * 'x86-efi-kexec-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) x86/efi: parse_efi_setup() build fix x86: ksysfs.c build fix x86/efi: Delete superfluous global variables x86: Reserve setup_data ranges late after parsing memmap cmdline x86: Export x86 boot_params to sysfs x86: Add xloadflags bit for EFI runtime support on kexec x86/efi: Pass necessary EFI data for kexec via setup_data efi: Export EFI runtime memory mapping to sysfs efi: Export more EFI table variables to sysfs x86/efi: Cleanup efi_enter_virtual_mode() function x86/efi: Fix off-by-one bug in EFI Boot Services reservation x86/efi: Add a wrapper function efi_map_region_fixed() x86/efi: Remove unused variables in __map_region() x86/efi: Check krealloc return value x86/efi: Runtime services virtual mapping x86/mm/cpa: Map in an arbitrary pgd x86/mm/pageattr: Add last levels of error path x86/mm/pageattr: Add a PUD error unwinding path x86/mm/pageattr: Add a PTE pagetable populating function x86/mm/pageattr: Add a PMD pagetable populating function ...
2014-01-20Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds2-2/+0
Pull x86 cleanups from Ingo Molnar: "Misc cleanups" * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, cpu, amd: Fix a shadowed variable situation um, x86: Fix vDSO build x86: Delete non-required instances of include <linux/init.h> x86, realmode: Pointer walk cleanups, pull out invariant use of __pa() x86/traps: Clean up error exception handler definitions
2014-01-16x86, intel_mid: Replace memcpy with struct assignmentFengguang Wu1-2/+2
This is a cleanup proposed by coccinelle. It replaces memcpy with struct assignment on intel-mid's sfi layer. Generated by: coccinelle/misc/memcpy-assign.cocci Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Link: http://lkml.kernel.org/r/1389917588-9785-1-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-16x86, intel-mid: Return proper error code from get_gpio_by_name()David Cohen1-1/+1
This patch cleans up get_gpio_by_name() to return an error code instead of hardcoded -1. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1389913624-9149-4-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-16x86, intel-mid: Check get_gpio_by_name() error code on platform codeDavid Cohen7-8/+12
This patch does cleanup on all intel mid platform code that uses gpio_get_by_name() function. From now on they should check for any error code instead of only hardcoded -1. There are no functional changes from this change. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1389913624-9149-3-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-16x86, intel-mid: sfi_handle_*_dev() should check for pdata error codeDavid Cohen1-0/+6
When Intel MID finds a match between SFI table from FW and registered SFI devices, it will always register a device regardless the platform code was successful or not. This patch adds an extra option for platform code to return error code and abort device registration on SFI table parsing. This patch does not contain any functional changes for current intel mid platform code. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1389913624-9149-2-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-15x86, intel-mid: Add Merrifield platform supportDavid Cohen5-7/+137
This code was partially based on Mark Brown's previous work. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1387224459-25746-4-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: Fei Yang <fei.yang@intel.com> Cc: Mark F. Brown <mark.f.brown@intel.com> Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-15x86, intel-mid: Add Clovertrail platform supportKuppuswamy Sathyanarayanan3-9/+69
This patch adds Clovertrail support on intel-mid and makes it more flexible to support other SoCs. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1387224459-25746-3-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Fei Yang <fei.yang@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-15x86, intel-mid: Move Medfield code out of intel-mid.c core fileDavid Cohen4-37/+70
In order make the driver more portable and support other Intel MID (Mobile Internet Device) platforms we need to move Medfield code from intel-mid.c core to its own mfld.c file. This patch contains no functional changes. Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Link: http://lkml.kernel.org/r/1387224459-25746-2-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-13sched/clock, x86: Rewrite cyc2ns() to avoid the need to disable IRQsPeter Zijlstra1-26/+40
Use a ring-buffer like multi-version object structure which allows always having a coherent object; we use this to avoid having to disable IRQs while reading sched_clock() and avoids a problem when getting an NMI while changing the cyc2ns data. MAINLINE PRE POST sched_clock_stable: 1 1 1 (cold) sched_clock: 329841 331312 257223 (cold) local_clock: 301773 310296 309889 (warm) sched_clock: 38375 38247 25280 (warm) local_clock: 100371 102713 85268 (warm) rdtsc: 27340 27289 24247 sched_clock_stable: 0 0 0 (cold) sched_clock: 382634 372706 301224 (cold) local_clock: 396890 399275 399870 (warm) sched_clock: 38194 38124 25630 (warm) local_clock: 143452 148698 129629 (warm) rdtsc: 27345 27365 24307 Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-s567in1e5ekq2nlyhn8f987r@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-12Merge branch 'acpi-cleanup'Rafael J. Wysocki1-2/+1
* acpi-cleanup: (22 commits) ACPI / tables: Return proper error codes from acpi_table_parse() and fix comment. ACPI / tables: Check if id is NULL in acpi_table_parse() ACPI / proc: Include appropriate header file in proc.c ACPI / EC: Remove unused functions and add prototype declaration in internal.h ACPI / dock: Include appropriate header file in dock.c ACPI / PCI: Include appropriate header file in pci_link.c ACPI / PCI: Include appropriate header file in pci_slot.c ACPI / EC: Mark the function acpi_ec_add_debugfs() as static in ec_sys.c ACPI / NVS: Include appropriate header file in nvs.c ACPI / OSL: Mark the function acpi_table_checksum() as static ACPI / processor: initialize a variable to silence compiler warning ACPI / processor: use ACPI_COMPANION() to get ACPI device ACPI: correct minor typos ACPI / sleep: Drop redundant acpi_disabled check ACPI / dock: Drop redundant acpi_disabled check ACPI / table: Replace '1' with specific error return values ACPI: remove trailing whitespace ACPI / IBFT: Fix incorrect <acpi/acpi.h> inclusion in iSCSI boot firmware module ACPI / i915: Fix incorrect <acpi/acpi.h> inclusions via <linux/acpi_io.h> SFI / ACPI: Fix warnings reported during builds with W=1 ... Conflicts: drivers/acpi/nvs.c drivers/hwmon/asus_atk0110.c
2014-01-06x86: Delete non-required instances of include <linux/init.h>Paul Gortmaker2-2/+0
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. [ hpa: undid incorrect removal from arch/x86/kernel/head_32.S ] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Link: http://lkml.kernel.org/r/1389054026-12947-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2014-01-05Merge tag 'v3.13-rc7' into x86/efi-kexec to resolve conflictsIngo Molnar3-10/+4
Conflicts: arch/x86/platform/efi/efi.c drivers/firmware/efi/Kconfig Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-12-29x86/efi: Delete superfluous global variablesMatt Fleming2-18/+1
There's no need to save the runtime map details in global variables, the values are only required to pass to efi_runtime_map_setup(). And because 'nr_efi_runtime_map' isn't needed, get_nr_runtime_map() can be deleted along with 'efi_data_len'. Cc: Dave Young <dyoung@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-29x86/efi: Pass necessary EFI data for kexec via setup_dataDave Young3-25/+140
Add a new setup_data type SETUP_EFI for kexec use. Passing the saved fw_vendor, runtime, config tables and EFI runtime mappings. When entering virtual mode, directly mapping the EFI runtime regions which we passed in previously. And skip the step to call SetVirtualAddressMap(). Specially for HP z420 workstation we need save the smbios physical address. The kernel boot sequence proceeds in the following order. Step 2 requires efi.smbios to be the physical address. However, I found that on HP z420 EFI system table has a virtual address of SMBIOS in step 1. Hence, we need set it back to the physical address with the smbios in efi_setup_data. (When it is still the physical address, it simply sets the same value.) 1. efi_init() - Set efi.smbios from EFI system table 2. dmi_scan_machine() - Temporary map efi.smbios to access SMBIOS table 3. efi_enter_virtual_mode() - Map EFI ranges Tested on ovmf+qemu, lenovo thinkpad, a dell laptop and an HP z420 workstation. Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21efi: Export EFI runtime memory mapping to sysfsDave Young1-3/+43
kexec kernel will need exactly same mapping for EFI runtime memory ranges. Thus here export the runtime ranges mapping to sysfs, kexec-tools will assemble them and pass to 2nd kernel via setup_data. Introducing a new directory /sys/firmware/efi/runtime-map just like /sys/firmware/memmap. Containing below attribute in each file of that directory: attribute num_pages phys_addr type virt_addr Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21efi: Export more EFI table variables to sysfsDave Young1-0/+4
Export fw_vendor, runtime and config table physical addresses to /sys/firmware/efi/{fw_vendor,runtime,config_table} because kexec kernels need them. From EFI spec these 3 variables will be updated to virtual address after entering virtual mode. But kernel startup code will need the physical address. Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21x86/efi: Cleanup efi_enter_virtual_mode() functionDave Young1-53/+79
Add two small functions: efi_merge_regions() and efi_map_regions(), efi_enter_virtual_mode() calls them instead of embedding two long for loop. Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Borislav Petkov <bp@suse.de> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21x86/efi: Fix off-by-one bug in EFI Boot Services reservationDave Young1-1/+1
Current code check boot service region with kernel text region by: start+size >= __pa_symbol(_text) The end of the above region should be start + size - 1 instead. I see this problem in ovmf + Fedora 19 grub boot: text start: 1000000 md start: 800000 md size: 800000 Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Borislav Petkov <bp@suse.de> Acked-by: Toshi Kani <toshi.kani@hp.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Cc: stable@vger.kernel.org Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21x86/efi: Add a wrapper function efi_map_region_fixed()Dave Young2-0/+12
Kexec kernel will use saved runtime virtual mapping, so add a new function efi_map_region_fixed() for directly mapping a md to md->virt. The md is passed in from 1st kernel, the virtual addr is saved in md->virt_addr. Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Borislav Petkov <bp@suse.de> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-21x86/efi: Remove unused variables in __map_region()Dave Young1-5/+1
variables size and end is useless in this function, thus remove them. Reported-by: Toshi Kani <toshi.kani@hp.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-12-10x86, efi: Don't use (U)EFI time services on 32 bitMatthew Garrett1-7/+0
UEFI time services are often broken once we're in virtual mode. We were already refusing to use them on 64-bit systems, but it turns out that they're also broken on some 32-bit firmware, including the Dell Venue. Disable them for now, we can revisit once we have the 1:1 mappings code incorporated. Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com> Link: http://lkml.kernel.org/r/1385754283-2464-1-git-send-email-matthew.garrett@nebula.com Cc: <stable@vger.kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-12-10x86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot option is usedcpw1-2/+3
The SGI UV tlb shootdown code panics the system with a NULL pointer deference if 'nobau' is specified on the boot commandline. uv_flush_tlb_other() gets called for every flush, whether the BAU is disabled or not. It should not be keeping the s_enters statistic while the BAU is disabled. The panic occurs because during initialization init_per_cpu_tunables() does not set the bcp->statp pointer if 'nobau' was specified. Signed-off-by: Cliff Wickman <cpw@sgi.com> Cc: <stable@vger.kernel.org> # 3.12.x Link: http://lkml.kernel.org/r/E1VnzBi-0005yF-MU@eag09.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-12-07ACPI: Clean up inclusions of ACPI header filesLv Zheng1-2/+1
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-28x86/efi: Fix earlyprintk off-by-one bugMatt Fleming1-1/+1
Dave reported seeing the following incorrect output on his Thinkpad T420 when using earlyprintk=efi, [ 0.000000] efi: EFI v2.00 by Lenovo ACPI=0xdabfe000 ACPI 2.0=0xdabfe014 SMBIOS=0xdaa9e000 The output should be on one line, not split over two. The cause is an off-by-one error when checking that the efi_y coordinate hasn't been incremented out of bounds. Reported-by: Dave Young <dyoung@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-11-26Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/efiIngo Molnar4-35/+248
Pull EFI virtual mapping changes from Matt Fleming: * New static EFI runtime services virtual mapping layout which is groundwork for kexec support on EFI. (Borislav Petkov) Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-14Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-1/+1
Pull two x86 fixes from Ingo Molnar. * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/microcode/amd: Tone down printk(), don't treat a missing firmware file as an error x86/dumpstack: Fix printk_address for direct addresses
2013-11-14Merge tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds1-8/+1
Pull ACPI and power management updates from Rafael J Wysocki: - New power capping framework and the the Intel Running Average Power Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan. - Addition of the in-kernel switching feature to the arm_big_little cpufreq driver from Viresh Kumar and Nicolas Pitre. - cpufreq support for iMac G5 from Aaro Koskinen. - Baytrail processors support for intel_pstate from Dirk Brandewie. - cpufreq support for Midway/ECX-2000 from Mark Langsdorf. - ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha. - ACPI power management support for the I2C and SPI bus types from Mika Westerberg and Lv Zheng. - cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat, Stratos Karafotis, Xiaoguang Chen, Lan Tianyu. - cpufreq drivers updates (mostly fixes and cleanups) from Viresh Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev. - intel_pstate updates from Dirk Brandewie and Adrian Huang. - ACPICA update to version 20130927 includig fixes and cleanups and some reduction of divergences between the ACPICA code in the kernel and ACPICA upstream in order to improve the automatic ACPICA patch generation process. From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh Bhat, Bjorn Helgaas, David E Box. - ACPI IPMI driver fixes and cleanups from Lv Zheng. - ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang Yanfei, Rafael J Wysocki. - Conversion of the ACPI AC driver to the platform bus type and multiple driver fixes and cleanups related to ACPI from Zhang Rui. - ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu, Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki. - Fixes and cleanups and new blacklist entries related to the ACPI video support from Aaron Lu, Felipe Contreras, Lennart Poettering, Kirill Tkhai. - cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi. - cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han, Bartlomiej Zolnierkiewicz, Prarit Bhargava. - devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe. - Operation Performance Points (OPP) core updates from Nishanth Menon. - Runtime power management core fix from Rafael J Wysocki and update from Ulf Hansson. - Hibernation fixes from Aaron Lu and Rafael J Wysocki. - Device suspend/resume lockup detection mechanism from Benoit Goby. - Removal of unused proc directories created for various ACPI drivers from Lan Tianyu. - ACPI LPSS driver fix and new device IDs for the ACPI platform scan handler from Heikki Krogerus and Jarkko Nikula. - New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa. - Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter, Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause, Liu Chuansheng. - Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding, Jean-Christophe Plagniol-Villard. * tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits) cpufreq: conservative: fix requested_freq reduction issue ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines PM / runtime: Use pm_runtime_put_sync() in __device_release_driver() ACPI / event: remove unneeded NULL pointer check Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1" ACPI / video: Quirk initial backlight level 0 ACPI / video: Fix initial level validity test intel_pstate: skip the driver if ACPI has power mgmt option PM / hibernate: Avoid overflow in hibernate_preallocate_memory() ACPI / hotplug: Do not execute "insert in progress" _OST ACPI / hotplug: Carry out PCI root eject directly ACPI / hotplug: Merge device hot-removal routines ACPI / hotplug: Make acpi_bus_hot_remove_device() internal ACPI / hotplug: Simplify device ejection routines ACPI / hotplug: Fix handle_root_bridge_removal() ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug ACPI / scan: Start matching drivers after trying scan handlers ACPI: Remove acpi_pci_slot_init() headers from internal.h ACPI / blacklist: fix name of ThinkPad Edge E530 PowerCap: Fix build error with option -Werror=format-security ... Conflicts: arch/arm/mach-omap2/opp.c drivers/Kconfig drivers/spi/spi.c
2013-11-12x86/dumpstack: Fix printk_address for direct addressesJiri Slaby1-1/+1
Consider a kernel crash in a module, simulated the following way: static int my_init(void) { char *map = (void *)0x5; *map = 3; return 0; } module_init(my_init); When we turn off FRAME_POINTERs, the very first instruction in that function causes a BUG. The problem is that we print IP in the BUG report using %pB (from printk_address). And %pB decrements the pointer by one to fix printing addresses of functions with tail calls. This was added in commit 71f9e59800e5ad4 ("x86, dumpstack: Use %pB format specifier for stack trace") to fix the call stack printouts. So instead of correct output: BUG: unable to handle kernel NULL pointer dereference at 0000000000000005 IP: [<ffffffffa01ac000>] my_init+0x0/0x10 [pb173] We get: BUG: unable to handle kernel NULL pointer dereference at 0000000000000005 IP: [<ffffffffa0152000>] 0xffffffffa0151fff To fix that, we use %pS only for stack addresses printouts (via newly added printk_stack_address) and %pB for regs->ip (via printk_address). I.e. we revert to the old behaviour for all except call stacks. And since from all those reliable is 1, we remove that parameter from printk_address. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: joe@perches.com Cc: jirislaby@gmail.com Link: http://lkml.kernel.org/r/1382706418-8435-1-git-send-email-jslaby@suse.cz Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-12Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds2-1/+701
Pull x86 UV debug changes from Ingo Molnar: "Various SGI UV debuggability improvements, amongst them KDB support, with related core KDB enabling patches changing kernel/debug/kdb/" * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "x86/UV: Add uvtrace support" x86/UV: Add call to KGDB/KDB from NMI handler kdb: Add support for external NMI handler to call KGDB/KDB x86/UV: Check for alloc_cpumask_var() failures properly in uv_nmi_setup() x86/UV: Add uvtrace support x86/UV: Add kdump to UV NMI handler x86/UV: Add summary of cpu activity to UV NMI handler x86/UV: Update UV support for external NMI signals x86/UV: Move NMI support
2013-11-12Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds3-3/+3
Pull x86 platform fixlet from Ingo Molnar: "A single __initdata fix" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/geode: Fix incorrect placement of __initdata tag
2013-11-12Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds29-1071/+1671
Pull x86/intel-mid changes from Ingo Molnar: "Update the 'intel mid' (mobile internet device) platform code as Intel is rolling out more SoC designs. This gets rid of most of the 'MRST' platform code in the process, mostly by renaming and shuffling code around into their respective 'intel-mid' platform drivers" * 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, intel-mid: Do not re-introduce usage of obsolete __cpuinit intel_mid: Move platform device setups to their own platform_<device>.* files x86: intel-mid: Add section for sfi device table intel-mid: sfi: Allow struct devs_id.get_platform_data to be NULL intel_mid: Moved SFI related code to sfi.c intel_mid: Added custom handler for ipc devices intel_mid: Added custom device_handler support intel_mid: Refactored sfi_parse_devs() function intel_mid: Renamed *mrst* to *intel_mid* pci: intel_mid: Return true/false in function returning bool intel_mid: Renamed *mrst* to *intel_mid* mrst: Fixed indentation issues mrst: Fixed printk/pr_* related issues
2013-11-12Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds3-116/+202
Pull x86 EFI changes from Ingo Molnar: "Main changes: - Add support for earlyprintk=efi which uses the EFI framebuffer. Very useful for debugging boot problems. - EFI stub support for large memory maps (more than 128 entries) - EFI ARM support - this was mostly done by generalizing x86 <-> ARM platform differences, such as by moving x86 EFI code into drivers/firmware/efi/ and sharing it with ARM. - Documentation updates - misc fixes" * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits) x86/efi: Add EFI framebuffer earlyprintk support boot, efi: Remove redundant memset() x86/efi: Fix config_table_type array termination x86 efi: bugfix interrupt disabling sequence x86: EFI stub support for large memory maps efi: resolve warnings found on ARM compile efi: Fix types in EFI calls to match EFI function definitions. efi: Renames in handle_cmdline_files() to complete generalization. efi: Generalize handle_ramdisks() and rename to handle_cmdline_files(). efi: Allow efi_free() to be called with size of 0 efi: use efi_get_memory_map() to get final map for x86 efi: generalize efi_get_memory_map() efi: Rename __get_map() to efi_get_memory_map() efi: Move unicode to ASCII conversion to shared function. efi: Generalize relocate_kernel() for use by other architectures. efi: Move relocate_kernel() to shared file. efi: Enforce minimum alignment of 1 page on allocations. efi: Rename memory allocation/free functions efi: Add system table pointer argument to shared functions. efi: Move common EFI stub code from x86 arch code to common location ...
2013-11-11Revert "x86/UV: Add uvtrace support"Ingo Molnar1-12/+1
This reverts commit 8eba18428ac926f436064ac281e76d36d51bd631. uv_trace() is not used by anything, nor is uv_trace_nmi_func, nor uv_trace_func. That's not how we do instrumentation code in the kernel: we add tracepoints, printk()s, etc. so that everyone not just those with magic kernel modules can debug a system. So remove this unused (and misguied) piece of code. Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Mike Travis <travis@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Jason Wessel <jason.wessel@windriver.com> Link: http://lkml.kernel.org/n/tip-tumfBffmr4jmnt8Gyxanoblg@git.kernel.org
2013-11-07x86, intel-mid: Do not re-introduce usage of obsolete __cpuinitPaul Gortmaker1-1/+1
The commit 712b6aa8731a7e148298c58cea66a5209c659e3c [Nov7 linux-next via tip/auto-latest] ("intel_mid: Renamed *mrst* to *intel_mid*") adds a __cpuinit. We removed this a couple versions ago; we now want to remove the compat no-op stubs. Introducing new users is not what we want to see at this point in time, as it will break once the stubs are gone. Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Cc: David Cohen <david.a.cohen@linux.intel.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Link: http://lkml.kernel.org/r/1383849290-11250-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-11-02x86/efi: Check krealloc return valueBorislav Petkov1-0/+8
Check it just in case. We might just as well panic there because runtime won't be functioning anyway. Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.