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* [PATCH] x86_64: Initialize powernow_data[] for all siblingsAndi Kleen2006-03-251-3/+4
| | | | | | | | | | | | | I got an oops on a dual core system because the lost tick handler called cpufreq_get() on core 1 and powernow tried to follow a NULL powernow_data[] pointer there. Initialize powernow_data for all cores of a CPU. Cc: Jacob Shin <jacob.shin@amd.com> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: List Intel LaGrange AKA SMX in /proc/cpuinfoAndi Kleen2006-03-251-1/+1
| | | | | | | Spec just got published so we know the CPUID bit. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Quieten down microcode update driverAndi Kleen2006-03-251-4/+0
| | | | | | | | | | | | Only log data in microcode driver when something is changed Otherwise it was far too noisy on large systems. Also remove the printk when it is unloaded. Cc: tigran@veritas.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Implement early DMI scanningAndi Kleen2006-03-251-0/+1
| | | | | | | | | | | There are more and more cases where we need to know DMI information early to work around bugs. i386 already had early DMI scanning, but x86-64 didn't. Implement this now. This required some cleanup in the i386 code. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Clean up and tweak ACPI blacklist year codeAndi Kleen2006-03-251-0/+30
| | | | | | | | | | | | - Move the core parser into dmi_scan.c. It can be useful for other subsystems too. - Differentiate between field doesn't exist and field is 0 or unparseable. The first case is likely an old BIOS with broken ACPI, the later is likely a slightly buggy BIOS where someone forget to edit the date. Don't blacklist in the later case. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds2006-03-2514-313/+278
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] kzalloc conversion for gx-suspmod [CPUFREQ] Whitespace cleanup [CPUFREQ] Mark longhaul driver as broken. [PATCH] cpufreq: fix section mismatch warnings [CPUFREQ] Fix the p4-clockmod N60 errata workaround. [CPUFREQ] Fix handling for CPU hotplug [CPUFREQ] powernow-k8: Let cpufreq driver handle affected CPUs [CPUFREQ] Lots of whitespace & CodingStyle cleanup. [CPUFREQ] Remove duplicate cpuinfo struct [CPUFREQ] Silence powernow-k8 warning on k7's.
| * [CPUFREQ] kzalloc conversion for gx-suspmodDave Jones2006-03-111-2/+1
| | | | | | | | Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Whitespace cleanupDave Jones2006-03-111-11/+11
| | | | | | | | Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Mark longhaul driver as broken.Dave Jones2006-03-111-0/+1
| | | | | | | | | | | | | | | | | | This seems to work for a short period of time, but when used in conjunction with a userspace governor that changes the frequency regularly, it's only a matter of time before everything just locks up. Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Fix the p4-clockmod N60 errata workaround.Pallipadi, Venkatesh2006-03-101-1/+1
| | | | | | | | | | | | | | Fix the code to disable freqs less than 2GHz in N60 errata. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] powernow-k8: Let cpufreq driver handle affected CPUsDave Jones2006-03-051-12/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | powernow-k8: Let cpufreq driver handle affected CPUs Let the cpufreq driver manage AMD Dual-Core CPUs being tied together. Since cpufreq driver's affected CPUs data, cpufreq_policy->cpus, already knows about which cores are tied together, powernow driver does not have keep its internal data for every core. (even a pointer.. it will never be called on) Telling cpufreq driver about cpu_core_map at init time is sufficient. Signed-off-by: Jacob Shin <jacob.shin@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Lots of whitespace & CodingStyle cleanup.Dave Jones2006-02-2813-283/+257
| | | | | | | | Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Remove duplicate cpuinfo structDave Jones2006-02-281-3/+1
| | | | | | | | | | | | | | We already have one of these declared, so use it, instead of declaring a second one for no good reason. Signed-off-by: Dave Jones <davej@redhat.com>
| * [CPUFREQ] Silence powernow-k8 warning on k7's.Dave Jones2006-02-281-1/+3
| | | | | | | | Signed-off-by: Dave Jones <davej@redhat.com>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds2006-03-251-1/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits) kbuild: remove obsoleted scripts/reference_* files kbuild: fix make help & make *pkg kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h Kconfig: remove the CONFIG_CC_ALIGN_* options kbuild: add -fverbose-asm to i386 Makefile kbuild: clean-up genksyms kbuild: Lindent genksyms.c kbuild: fix genksyms build error kbuild: in makefile.txt note that Makefile is preferred name for kbuild files kbuild: replace PHONY with FORCE kbuild: Fix bug in crc symbol generating of kernel and modules kbuild: change kbuild to not rely on incorrect GNU make behavior kbuild: when warning symbols exported twice now tell user this is the problem kbuild: fix make dir/file.xx when asm symlink is missing kbuild: in the section mismatch check try harder to find symbols kbuild: fix section mismatch check for unwind on IA64 kbuild: kill false positives from section mismatch warnings for powerpc kbuild: kill trailing whitespace in modpost & friends kbuild: small update of allnoconfig description kbuild: make namespace.pl CROSS_COMPILE happy ... Trivial conflict in arch/ppc/boot/Makefile manually fixed up
| * | x86: align per-cpu section to configured cache bytesZach Brown2006-02-191-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | This matches the fix for a bug seen on x86-64. Test booted on old hardware that had 32 byte cachelines to begin with. Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | | [PATCH] cpufreq: speedstep-smi asm fixAndrew Morton2006-03-251-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix bug identified by Linus Torvalds <torvalds@osdl.org>: the `out' instruction depends upon the state of memory_data[], so we need to tell gcc that before executing it. (The opcode, not gcc). Fixes http://bugzilla.kernel.org/show_bug.cgi?id=5553 Thanks to Antonio Ospite <ospite@studenti.unina.it> for testing. Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Check if cpu can be onlined before calling smp_prepare_cpu()Ashok Raj2006-03-251-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Moved check for online cpu out of smp_prepare_cpu() - Moved default declaration of smp_prepare_cpu() to kernel/cpu.c - Removed lock_cpu_hotplug() from smp_prepare_cpu() to around it, since its called from cpu_up() as well now. - Removed clearing from cpu_present_map during cpu_offline as it breaks using cpu_up() directly during a subsequent online operation. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: "Li, Shaohua" <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] fix DMI onboard device discoveryAndrey Panin2006-03-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Attached patch fixes invalid pointer arithmetic in DMI code to make onboard device discovery working again. akpm: bug has been present since dmi_find_device() was added in 2.6.14. Affects ipmi only (I think) - the symptoms weren't described. akpm: changed to use pointer arithmetic rather than open-coded sizeof. Signed-off-by: Andrey Panin <pazke@donpac.ru> Cc: Corey Minyard <minyard@acm.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] kill include/linux/platform.h, default_idle() cleanupAdrian Bunk2006-03-241-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | include/linux/platform.h contained nothing that was actually used except the default_idle() prototype, and is therefore removed by this patch. This patch does the following with the platform specific default_idle() functions on different architectures: - remove the unused function: - parisc - sparc64 - make the needlessly global function static: - arm - h8300 - m68k - m68knommu - s390 - v850 - x86_64 - add a prototype in asm/system.h: - cris - i386 - ia64 Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Patrick Mochel <mochel@digitalimplant.org> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] more-for_each_cpu-conversions fixAndrew Morton2006-03-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I screwed up this conversion - we should be iterating across online CPUs, not possible ones. Spotted by Joe Perches <joe@perches.com> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] PCI: resource address mismatchLinus Torvalds2006-03-232-6/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Tue, 21 Feb 2006, Ivan Kokshaysky wrote: > There are two bogus entries in the BIOS memory map table which are > conflicting with a prefetchable memory range of the AGP bridge: > > BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved) > BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > > 0000:00:02.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) (prog-if 00 [Normal decode]) > Flags: bus master, fast devsel, latency 0 > Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 > I/O behind bridge: 0000c000-0000cfff > Memory behind bridge: e7e00000-e7efffff > Prefetchable memory behind bridge: fec00000-ffcfffff > ^^^^^^^^^^^^^^^^^ Yes. However, it's pretty clear that the e820 entries are there for a reason. Probably they are a hack by the BIOS maintainers to keep Windows from stomping/moving that region, exactly because they want to keep the bridge where it is (or, it's actually for the BIOS itself - the BIOS tables are a horrid mess, and BIOS engineers are pretty hacky people: they'll add random entries to make their own broken algorithms do the "right thing"). > Starting from 2.6.13, kernel tries to resolve that sort of conflicts, > so that prefetch window of the bridge and the framebuffer memory behind > it get moved to 0x10000000. I think we could (and probably should) solve this another way: consider the ACPI "reserved regions" from the e820 map exactly the same way that we do other ACPI hints - they should restrict _new_ allocations, but not impact stuff we figure out on our own. Basically, right now we assign _unassigned_ resources at "fs_initcall" time. If we were to add in the e820 "reserved region" stuff before that (but after we've done PCI discovery), we'd probably do the right thing. Right now we do the e820 reserved regions very early indeed: we call "register_memory()" from setup_arch(). We could move at least part of it (the part that registers the resources) down a bit. Here's a test-patch. I'm not saying we should absolutely do this, but it might be interesting to try... Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: <bjk@luxsci.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | [PATCH] more for_each_cpu() conversionsAndrew Morton2006-03-233-18/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we stop allocating percpu memory for not-possible CPUs we must not touch the percpu data for not-possible CPUs at all. The correct way of doing this is to test cpu_possible() or to use for_each_cpu(). This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very few instances of this bug, if any. But the patch converts lots of open-coded test to use the preferred helper macros. Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Cc: Christian Zankel <chris@zankel.net> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: Nathan Scott <nathans@sgi.com> Cc: Jens Axboe <axboe@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] pause_on_oops command line optionAndrew Morton2006-03-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Attempt to fix the problem wherein people's oops reports scroll off the screen due to repeated oopsing or to oopses on other CPUs. If this happens the user can reboot with the `pause_on_oops=<seconds>' option. It will allow the first oopsing CPU to print an oops record just a single time. Second oopsing attempts, or oopses on other CPUs will cause those CPUs to enter a tight loop until the specified number of seconds have elapsed. The patch implements the infrastructure generically in the expectation that architectures other than x86 will find it useful. Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] make bug messages more consistentIngo Molnar2006-03-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Consolidate all kernel bug printouts to begin with the "BUG: " string. Makes it easier to find them in large bootup logs. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] sem2mutex: kprobesIngo Molnar2006-03-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] swsusp: finally solve mysqld problemRafael J. Wysocki2006-03-231-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch from Pavel moves userland freeze signals handling into more logical place. It now hits even with mysqld running. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86 topology: don;t create a control file for BSP that cannot be removedAshok Raj2006-03-231-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't create "online" control file for BSP (i386/x86_64) since its not removable. We originally added this to support ppc64 if the kernel has support but BIOS indicated no offline support, we just didnt create online files for them. We used the same method in ia64 as well, if we have a cpu taking platform interrupts but cannot be removed if those interrupts cannot be re-targeted to another cpu. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86: deterine xapic using apic versionShaohua Li2006-03-232-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Checking APIC version instead of CPU family to determine XAPIC. Family 6 CPU could have xapic as well. Signed-off-by: Shaohua Li<shaohua.li@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86: cpuid.4 doesn't need cpu level 5Shaohua Li2006-03-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Detecting cache line using cpuid.4, cpuid level 4 is enough. Signed-off-by: Shaohua Li<shaohua.li@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: fix dump_stack()Chuck Ebbert2006-03-231-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | i386 has a small bug in the stack dump code where it prints an extra log level code. Remove that and fix the alignment of normal stack dump printout. Also remove some unnecessary printk() calls. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: cleanup after cpu_gdt_descr conversion to per-cpu dataJan Beulich2006-03-231-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With cpu_gdt_descr having been converted to per-CPU data, the old object (in head.S) no longer needs to reserve space for each CPU's instance. With cpu_gdt_table not being used for CPU 0 anymore, it doesn't seem to need page alignment (or if in fact there is a need for it to retain that alignment, the whole object should go into .data.page_align). Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Fix the imlicit declaration of mtrr_centaur_report_mcr in ↵Jesper Juhl2006-03-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/i386/kernel/cpu/centaur.c arch/i386/kernel/cpu/centaur.c: In function `centaur_mcr_insert': arch/i386/kernel/cpu/centaur.c:33: warning: implicit declaration of function `mtrr_centaur_report_mcr' Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] fix implicit declaration of GET_APIC_ID in arch/i386/kernel/apic.cJesper Juhl2006-03-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | arch/i386/kernel/apic.c:840: warning: implicit declaration of function `GET_APIC_ID' Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: more vsyscall documentationChuck Ebbert2006-03-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Document a limitation of vsyscall-sysenter, since patches to fix it have been rejected. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: fix singlestep through an int80 syscallChuck Ebbert2006-03-231-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using PTRACE_SINGLESTEP on a child that does an int80 syscall misses the SIGTRAP that should be delivered upon syscall exit. Fix that by setting TIF_SINGLESTEP when entering the kernel via int80 with TF set. /* Test whether singlestep through an int80 syscall works. */ #define _GNU_SOURCE #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <sys/ptrace.h> #include <sys/wait.h> #include <sys/mman.h> #include <asm/user.h> static int child, status; static struct user_regs_struct regs; static void do_child() { ptrace(PTRACE_TRACEME, 0, 0, 0); kill(getpid(), SIGUSR1); asm ("int $0x80" : : "a" (20)); /* getpid */ } static void do_parent() { unsigned long eip, expected = 0; again: waitpid(child, &status, 0); if (WIFEXITED(status) || WIFSIGNALED(status)) return; if (WIFSTOPPED(status)) { ptrace(PTRACE_GETREGS, child, 0, &regs); eip = regs.eip; if (expected) fprintf(stderr, "child stop @ %08x, expected %08x %s\n", eip, expected, eip == expected ? "" : " <== ERROR"); if (*(unsigned short *)eip == 0x80cd) { fprintf(stderr, "int 0x80 at %08x\n", (unsigned int)eip); expected = eip + 2; } else expected = 0; ptrace(PTRACE_SINGLESTEP, child, NULL, NULL); } goto again; } int main(int argc, char * const argv[]) { child = fork(); if (child) do_parent(); else do_child(); return 0; } Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: fix uses of user_mode() vs. user_mode_vm()Jan Beulich2006-03-233-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | >commit 76381fee7e8feb4c22be636aa5d4765dbe4fbf9e >Author: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk> >Date: Thu Jun 23 00:08:46 2005 -0700 > > [PATCH] xen: x86_64: use more usermode macro > > Make use of the user_mode macro where it's possible. This is useful for Xen > because it will need only to redefine only the macro to a hypervisor call. I am of the opinion that the above changeset is incomplete, i.e. it missed converting some previous uses of user_mode to user_mode_vm. While most of them could be considered just cosmetical, at least the one in die_nmi doesn't appear to be. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk> Cc: Zachary Amsden <zach@vmware.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: actively synchronize vmalloc area when registering certain ↵Jan Beulich2006-03-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | callbacks Registering a callback handler through register_die_notifier() is obviously primarily intended for use by modules. However, the way these currently get called it is basically impossible for them to actually be used by modules, as there is, on non-PAE configurationes, a good chance (the larger the module, the better) for the system to crash as a result. This is because the callback gets invoked (a) in the page fault path before the top level page table propagation gets carried out (hence a fault to propagate the top level page table entry/entries mapping to module's code/data would nest infinitly) and (b) in the NMI path, where nested faults must absolutely not happen, since otherwise the IRET from the nested fault re-enables NMIs, potentially resulting in nested NMI occurences. Besides the modular aspect, similar problems would even arise for in- kernel consumers of the API if they touched ioremap()ed or vmalloc()ed memory inside their handlers. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86: early printk handling fixesStas Sergeev2006-03-231-13/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The history is that -mm kernels do not work for me for a few months already. The things started from crashing somewhere after starting init, and for the last month - no boot at all, just "Uncompressing... OK, booting kernel", and silence. Early console didn't work too. With the latest releases this degraded into an infinite stream of the "Unknown interrupt or fault" messages. So today my patience ran out and I started to think how can I collect at least some info for the bug-report. Attached is the patch that allows to gather some valueable debug info on the problem by making an early console more useable. I can't properly test the patch, as the kernel still doesn't boot, so I'll explain it in details in a hope someone else can justify the intrusive changes. arch_hooks.h: added prototypes for setup_early_printk() and early_printk(). setup.c: killed wrong setup_early_printk() prototype. Moved setup_early_printk() a bit earlier, as it was not "early enough" to cover the bug I was fighting with. early_printk.c: made it to start printing from the bottom of the screen, otherwise the messages interfere with the ones of the boot-loader, so you can't read them. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Cc: Andi Kleen <ak@muc.de> Cc: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: let signal handlers set the resume flagChuck Ebbert2006-03-231-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Allow signal handlers to set the RF bit in EFLAGS. This lets a simple debugger using SIGTRAP skip one instruction after returning from a signal. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: Don't let ptrace set the nested task bitChuck Ebbert2006-03-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | There's no good reason for allowing ptrace to set the NT bit in EFLAGS, so mask it off. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386 traps: merge printk callsJean Delvare2006-03-231-6/+3
| | | | | | | | | | | | | | | | | | | | | | | | Merge a few printk calls in i386 traps. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386)Natalie.Protasevich@unisys.com2006-03-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ES7000 platform code clean up for compilation errors and a warning. Ifdef'd the ACPI related parts in the ES7000 platform code. They were causing compile errors in certain configuration (without ACPI defined). I think this approach would be best (as opposed to Kconfig changes) since it only touches the subarch... Signed-off-by: <Natalie.Protasevich@unisys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: fall back to sensible CPU model nameChuck Ebbert2006-03-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When vendor-specific i386 initialization code is unavailable the kernel falls back to a default CPU model name. Make that model name reflect the CPU family instead of an internal vendor index. Tested on Pentium II (family 6 model 5). /proc/cpuinfo before: model name : ff/05 after: model name : 06/05 Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: allow disabling X86_FEATURE_SEP at bootChuck Ebbert2006-03-231-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | Allow the x86 "sep" feature to be disabled at bootup. This forces use of the int80 vsyscall. Mainly for testing or benchmarking the int80 vsyscall code. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: __devinit should be __cpuinitChuck Ebbert2006-03-233-23/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several places in arch/i386/kernel/cpu and kernel/cpu were using __devinit when they should have been __cpuinit. Fixing that saves ~4K when CONFIG_HOTPLUG && !CONFIG_HOTPLUG_CPU. Noticed by Andrew Morton. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86: SMP alternativesGerd Hoffmann2006-03-238-111/+372
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement SMP alternatives, i.e. switching at runtime between different code versions for UP and SMP. The code can patch both SMP->UP and UP->SMP. The UP->SMP case is useful for CPU hotplug. With CONFIG_CPU_HOTPLUG enabled the code switches to UP at boot time and when the number of CPUs goes down to 1, and switches to SMP when the number of CPUs goes up to 2. Without CONFIG_CPU_HOTPLUG or on non-SMP-capable systems the code is patched once at boot time (if needed) and the tables are released afterwards. The changes in detail: * The current alternatives bits are moved to a separate file, the SMP alternatives code is added there. * The patch adds some new elf sections to the kernel: .smp_altinstructions like .altinstructions, also contains a list of alt_instr structs. .smp_altinstr_replacement like .altinstr_replacement, but also has some space to save original instruction before replaving it. .smp_locks list of pointers to lock prefixes which can be nop'ed out on UP. The first two are used to replace more complex instruction sequences such as spinlocks and semaphores. It would be possible to deal with the lock prefixes with that as well, but by handling them as special case the table sizes become much smaller. * The sections are page-aligned and padded up to page size, so they can be free if they are not needed. * Splitted the code to release init pages to a separate function and use it to release the elf sections if they are unused. Signed-off-by: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] i386: multi-column stack backtracesChuck Ebbert2006-03-231-5/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Print stack backtraces in multiple columns, saving screen space. Number of columns is configurable and defaults to one so behavior is backwards-compatible. Also removes the brackets around addresses when printing more that one entry per line so they print as: <address> instead of: [<address>] This helps multiple entries fit better on one line. Original idea by Dave Jones, taken from x86_64. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Uninline sys_mmap common code (reduce binary size)Michael Buesch2006-03-221-16/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the inlining of the new vs old mmap system call common code. This reduces the size of the resulting vmlinux for defconfig as follows: mb@pc1:~/develop/git/linux-2.6$ size vmlinux.mmap* text data bss dec hex filename 3303749 521524 186564 4011837 3d373d vmlinux.mmapinline 3303557 521524 186564 4011645 3d367d vmlinux.mmapnoinline The new sys_mmap2() has also one function call overhead removed, now. (probably it was already optimized to a jmp before, but anyway...) Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] on_each_cpu(): disable local interruptsAndrew Morton2006-03-221-16/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When on_each_cpu() runs the callback on other CPUs, it runs with local interrupts disabled. So we should run the function with local interrupts disabled on this CPU, too. And do the same for UP, so the callback is run in the same environment on both UP and SMP. (strictly it should do preempt_disable() too, but I think local_irq_disable is sufficiently equivalent). Also uninlines on_each_cpu(). softirq.c was the most appropriate file I could find, but it doesn't seem to justify creating a new file. Oh, and fix up that comment over (under?) x86's smp_call_function(). It drives me nuts. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
generated by cgit (git 2.34.1) at 2024-11-13 06:26:36 +0000