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* [PATCH] set_page_dirty() return value fixesAndrew Morton2006-03-241-1/+1
| | | | | | | | | | | | We need set_page_dirty() to return true if it actually transitioned the page from a clean to dirty state. This wasn't right in a couple of places. Do a kernel-wide audit, fix things up. This leaves open the possibility of returning a negative errno from set_page_dirty() sometime in the future. But we don't do that at present. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] early_printk: cleanup trailiing whitespaceRandy Dunlap2006-03-241-45/+45
| | | | | | | | Remove all trailing tabs and spaces. No other changes. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s/;;/;/gAlexey Dobriyan2006-03-248-12/+12
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> 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 Bunk2006-03-2412-19/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] s390: kzalloc() conversion in arch/s390Eric Sesterhenn2006-03-242-10/+4
| | | | | | | | | Convert all kmalloc + memset sequences in arch/s390 to kzalloc usage. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: connector supportMartin Schwidefsky2006-03-241-0/+2
| | | | | | | | | Include connector config in the s390 arch Kconfig to get support for connectors. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: cpu up retriesMichael Ryan2006-03-241-1/+3
| | | | | | | | | Retry starting of new cpu if sigp restart returns condition code 2 (busy). Signed-off-by: Michael Ryan <ryan@funsoft.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: /proc/sys/vm/cmm_* permission bitsMartin Schwidefsky2006-03-241-3/+3
| | | | | | | | Set permissoin of /proc/sys/vm/cmm_* files to 0644. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: early parameter parsingHeiko Carstens2006-03-241-63/+45
| | | | | | | | | Use common code parser for early parameters instead of our own. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: {set,clear,test}_bit() related cleanup and pci_mmcfg_init() fixAkinobu Mita2006-03-243-15/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While working on these patch set, I found several possible cleanup on x86-64 and ia64. akpm: I stole this from Andi's queue. Not only does it clean up bitops. It also unrelatedly changes the prototype of pci_mmcfg_init() and removes its arch_initcall(). It seems that the wrong two patches got joined together, but this is the one which has been tested. This patch fixes the current x86_64 build error (the pci_mmcfg_init() declaration in arch/i386/pci/pci.h disagrees with the definition in arch/x86_64/pci/mmconfig.c) This also means that x86_64's pci_mmcfg_init() gets called in the same (new) manner as x86's: from arch/i386/pci/init.c:pci_access_init(), rather than via initcall. The bitops cleanups came along for free. All this worked OK in -mm testing (since 2.6.16-rc4-mm1) because x86_64 was tested with both patches applied. Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Con Kolivas <kernel@kolivas.org> Cc: Jean Delvare <khali@linux-fr.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: PCI/Cardbus cards hidden, needs pci=assign-busses to fixBernhard Kaindl2006-03-231-0/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "In some cases, especially on modern laptops with a lot of PCI and cardbus bridges, we're unable to assign correct secondary/subordinate bus numbers to all cardbus bridges due to BIOS limitations unless we are using "pci=assign-busses" boot option." -- Ivan Kokshaysky (from a patch comment) Without it, Cardbus cards inserted are never seen by PCI because the parent PCI-PCI Bridge of the Cardbus bridge will not pass and translate Type 1 PCI configuration cycles correctly and the system will fail to find and initialise the PCI devices in the system. Reference: PCI-PCI Bridges: PCI Configuration Cycles and PCI Bus Numbering: http://www.science.unitn.it/~fiorella/guidelinux/tlk/node72.html The reason for this is that: ``All PCI busses located behind a PCI-PCI bridge must reside between the secondary bus number and the subordinate bus number (inclusive).'' "pci=assign-busses" makes pcibios_assign_all_busses return 1 and this turns on PCI renumbering during PCI probing. Alan suggested to use DMI automatically set assign-busses on problem systems. The only question for me was where to put it. I put it directly before scanning PCI bus into pcibios_scan_root() because it's called from legacy, acpi and numa and so it can be one place for all systems and configurations which may need it. AMD64 Laptops are also affected and fixed by assign-busses, and the code is also incuded from arch/x86_64/pci/ that place will also work for x86_64 kernels, I only ifdef'-ed the x86-only Laptop in this example. Affected and known or assumed to be fixed with it are (found by googling): * ASUS Z71V and L3s * Samsung X20 * Compaq R3140us and all Compaq R3000 series laptops with TI1620 Controller, also Compaq R4000 series (from a kernel.org bugreport) * HP zv5000z (AMD64 3700+, known that fixup_parent_subordinate_busnr fixes it) * HP zv5200z * IBM ThinkPad 240 * An IBM ThinkPad (1.8 GHz Pentium M) debugged by Pavel Machek gives the correspondig message which detects the possible problem. * MSI S260 / Medion SIM 2100 MD 95600 The patch also expands the "try pci=assign-busses" warning so testers will help us to update the DMI table. Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [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] PCI: Give PCI config access initialization a defined orderingAndi Kleen2006-03-237-23/+40
| | | | | | | | | | | | | | I moved it to a separate function which is safer. This avoids problems with the linker reordering them and the less useful PCI config space access methods taking priority over the better ones. Fixes some problems with broken MMCONFIG Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] more for_each_cpu() conversionsAndrew Morton2006-03-2330-175/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Morton2006-03-232-16/+26
| | | | | | | | | | | | | | | | | 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] kill _INLINE_Adrian Bunk2006-03-232-10/+1
| | | | | | | | | | | This patch removes all occurances of _INLINE_ in the kernel. With the exception of tty_flip.h, I've simply removed the inline's since gcc should know best which functions to be inlined. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] make bug messages more consistentIngo Molnar2006-03-232-3/+3
| | | | | | | | | 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 Molnar2006-03-233-6/+6
| | | | | | | | | | | | 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] m68k: rtc driver cleanupJean Delvare2006-03-231-3/+1
| | | | | | | | | | Use the standard BCD macros instead of redefining them. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] swsusp: finally solve mysqld problemRafael J. Wysocki2006-03-232-8/+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: some fixups for the X86_NUMAQ dependenciesAdrian Bunk2006-03-231-4/+3
| | | | | | | | | | You must always ensure to fulfill the dependencies of what you are select'ing. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Martin Bligh <mbligh@google.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 Beulich2006-03-232-57/+119
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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(): remove MAX_YPOS and MAX_XPOS macrosAndrew Morton2006-03-231-13/+10
| | | | | | | | | | Expand out these fairly pointless macros. Cc: Chuck Ebbert <76306.1226@compuserve.com> Cc: Stas Sergeev <stsp@aknet.ru> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: start early_printk at sensible screen rowChuck Ebbert2006-03-231-1/+1
| | | | | | | | | | | Use boot info to start early_printk() at the current row on VGA console, as left by the boot loader. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Cc: Stas Sergeev <stsp@aknet.ru> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: early printk handling fixesStas Sergeev2006-03-232-14/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.com2006-03-233-7/+8
| | | | | | | | | | | | 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 Hoffmann2006-03-2310-135/+405
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Ebbert2006-03-232-5/+36
| | | | | | | | | | | | | | | | | | | | 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] Make CONFIG_REGPARM enabled by defaultIngo Molnar2006-03-231-2/+10
| | | | | | | | | Make CONFIG_REGPARM enabled by default. It's a noticable win both for size and for performance, and gcc[34] handles it correctly. 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] i386: let REGPARM no longer depend on EXPERIMENTALAdrian Bunk2006-03-231-4/+1
| | | | | | | | | | | | | | | REGPARM has already gotten much testing, what about removing the dependency on EXPERIMENTAL? Additionally, this patch does: - remove the useless "default n" - remove note regarding binary only modules (nowadays, there are even some binary only modules compiled with REGPARM=y available) Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sparc64: fix set_page_count merge clashNick Piggin2006-03-231-2/+2
| | | | | | | | | Merge clash will have broken sparc64. Synch up its online_page implementation with powerpc, which was identical until the set_page_count removal. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-03-22317-1339/+6063
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (78 commits) [PATCH] powerpc: Add FSL SEC node to documentation [PATCH] macintosh: tidy-up driver_register() return values [PATCH] powerpc: tidy-up of_register_driver()/driver_register() return values [PATCH] powerpc: via-pmu warning fix [PATCH] macintosh: cleanup the use of i2c headers [PATCH] powerpc: dont allow old RTC to be selected [PATCH] powerpc: make powerbook_sleep_grackle static [PATCH] powerpc: Fix warning in add_memory [PATCH] powerpc: update mailing list addresses [PATCH] powerpc: Remove calculation of io hole [PATCH] powerpc: iseries: Add bootargs to /chosen [PATCH] powerpc: iseries: Add /system-id, /model and /compatible [PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCII [PATCH] powerpc: iseries: Make more stuff static in platforms/iseries/mf.c [PATCH] powerpc: iseries: Remove pointless iSeries_(restart|power_off|halt) [PATCH] powerpc: iseries: mf related cleanups [PATCH] powerpc: Replace platform_is_lpar() with a firmware feature [PATCH] powerpc: trivial: Cleanup whitespace in cputable.h [PATCH] powerpc: Remove unused iommu_off logic from pSeries_init_early() [PATCH] powerpc: Unconfuse htab_bolt_mapping() callers ...
| * [PATCH] powerpc: tidy-up of_register_driver()/driver_register() return valuesBjorn Helgaas2006-03-231-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Remove the assumption that driver_register() returns the number of devices bound to the driver. In fact, it returns zero for success or a negative error value. Nobody uses the return value of of_register_driver() anyway. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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