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* x86: unify appropriate bits from dumpstack_32 and dumpstack_64Neil Horman2008-10-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup As promised, now that dumpstack_32 and dumpstack_64 have so many bits in common, we should merge the in-sync bits into a common file, to prevent them from diverging again. This patch removes bits which are common between dumpstack_32.c and dumpstack_64.c and places them in a common dumpstack.c which is built for both 32 and 64 bit arches. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu> Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/Makefile | 2 arch/x86/kernel/dumpstack.c | 319 +++++++++++++++++++++++++++++++++++++++++ arch/x86/kernel/dumpstack.h | 39 +++++ arch/x86/kernel/dumpstack_32.c | 294 ------------------------------------- arch/x86/kernel/dumpstack_64.c | 285 ------------------------------------ 5 files changed, 363 insertions(+), 576 deletions(-)
* i386, dumpstack: unify die()Alexander van Heukelum2008-10-22
| | | | | | | | | | | Make i386's die() equal to x86_64's version. Whitespace-only changes on x86_64, to make it equal to i386's version. (user_mode and user_mode_vm are equal on x86_64.) Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* i386, dumpstack: use oops_begin/oops_end in die_nmiAlexander van Heukelum2008-10-22
| | | | | | | | | | | Use oops_begin and oops_end in die_nmi. Whitespace-only changes on x86_64, to make it equal to i386's version. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* i386, dumpstack: use x86_64's method to account die_nest_countAlexander van Heukelum2008-10-22
| | | | | | | | | | | oops_begin/oops_end should always be used in pairs. On x86_64 oops_begin increments die_nest_count, and oops_end decrements die_nest_count. Doing this makes oops_begin and oops_end equal to the x86_64 versions. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, dumpstack: always call oops_exit from oops_endAlexander van Heukelum2008-10-22
| | | | | | | | | | | | Always call oops_exit from oops_end, even if signr==0. Also, move add_taint(TAINT_DIE) from __die to oops_end on x86_64 and interchange two lines to make oops_end more similar to the i386-version. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86_64, dumpstack: move kexec_crash from __die to oops_endAlexander van Heukelum2008-10-22
| | | | | | | | | | | oops_end is preceded by either a call to __die, or a conditional call to crash_kexec. Move the conditional call to crash_kexec from the end of __die to the start of oops_end and remove the superfluous call to crash_kexec in die_nmi. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, dumpstack: let signr=0 signal no do_exitAlexander van Heukelum2008-10-22
| | | | | | | | | | | | | | | Change oops_end such that signr=0 signals that do_exit is not to be called. Currently, each use of __die is soon followed by a call to oops_end and 'regs' is set to NULL if oops_end is expected not to call do_exit. Change all such pairs to set signr=0 instead. On x86_64 oops_end is used 'bare' in die_nmi; use signr=0 instead of regs=NULL there, too. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* i386, dumpstack: move crash_kexec before bust_spinlocks(0) in oops_endAlexander van Heukelum2008-10-22
| | | | | | | | | | crash_kexec should not be called with console_sem held. Move the call before bust_spinlocks(0) in oops_end to avoid the problem. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Acked-by: "Neil Horman" <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, kexec: fix hang on i386 when panic occurs while console_sem is heldNeil Horman2008-10-22
| | | | | | | | | | | | | | | | | | | There's a corner case in 32 bit x86 kdump at the moment. When the box panics via nmi, we call bust_spinlocks(1) to disable sensitivity to the console_sem (allowing us to print to the console in all cases), but we don't call crash_kexec, until after we call bust_spinlocks(0), which re-enables console_sem sensitivity. The result is that, if we get an nmi while the console_sem is held and kdump is configured, and we try to print something to the console during kdump shutdown (which we often do) we deadlock the box. The fix is to simply do what 64 bit die_nmi does which is to not call bust_spinlocks(0) until after we call crash_kexec. Patch below tested successfully by me. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* MCE: Don't run 32bit machine checks with interrupts onAndi Kleen2008-10-22
| | | | | | | | | | | | | | | Running machine checks with interrupt on is a extremly bad idea. The machine check handler only runs when the system is broken and needs to finish as quickly as possible. Remove the respective bogus post 2.6.27 regression and call the machine check vector directly again. This removes only code. Signed-off-by: Andi Kleen <ak@linux.intel.com> [Cherry-picked from x86/mce] Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: SB600: skip IRQ0 override if it is not routed to INT2 of IOAPICAndreas Herrmann2008-10-22
| | | | | | | | | | | | | | | | | | | | Impact: fix hung bootup and other misbehavior on certain laptops On some more HP laptops BIOS reports an IRQ0 override but the SB600 chipset is configured such that timer interrupts go to INT0 of IOAPIC. Check IRQ0 routing and if it is routed to INT0 of IOAPIC skip the timer override. See following bug reports: http://bugzilla.kernel.org/show_bug.cgi?id=11715 http://bugzilla.kernel.org/show_bug.cgi?id=11516 Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: make variables staticroel kluin2008-10-22
| | | | | | | These variables are only used in their source files, so make them static. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* misc: replace remaining __FUNCTION__ with __func__Harvey Harrison2008-10-20
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6Linus Torvalds2008-10-20
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6: parisc: convert to generic compat_sys_ptrace parisc: add rtc platform driver parisc: initialize unwinder much earlier parisc: add new syscalls parisc: hijack jump to start_kernel parisc: add pdc_coproc_cfg_unlocked and set_firmware_width_unlocked parisc: move include/asm-parisc to arch/parisc/include/asm parisc: move pdc_result to real2.S parisc: unify CCIO_COLLECT_STATS implementation parisc: add arch/parisc/kernel/.gitignore parisc: ropes.h - fix <asm-parisc/*> -> <asm/*> parisc: parisc-agp - fix <asm-parisc/*> -> <asm/*> Resolve remove/rename conflict: include/asm-parisc/a.out.h is no longer relevant.
| * parisc: convert to generic compat_sys_ptraceHelge Deller2008-10-17
| | | | | | | | | | | | | | | | | | This patch does the compat_sys_ptrace conversion for parisc. In addition it does convert the parisc ptrace code to use the architecture-independent ptrace infrastructure instead of own coding. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
| * parisc: add rtc platform driverKyle McMartin2008-10-10
| | | | | | | | Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
| * parisc: initialize unwinder much earlierJames Bottomley2008-10-10
| | | | | | | | | | | | | | | | | | | | The unwinder was being initialized way too late to be any use debugging early boot crashes. Instead of relying on module_init initcalls to initialize it, let's do it explicitly as early as we can. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
| * parisc: add new syscallsKyle McMartin2008-10-10
| | | | | | | | Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
| * parisc: hijack jump to start_kernelKyle McMartin2008-10-10
| | | | | | | | | | | | | | | | | | | | | | | | Bang in our own start_parisc call, which initializes the PDC width, and turns on the FPU. Previously, if CONFIG_PRINTK_TIME was on, we'd attempt to use the FPU before we had enabled it, resulting in a difficult to diagnose panic. This patch causes init_per_cpu to redundantly set these for cpu0, but this is harmless.
| * parisc: add pdc_coproc_cfg_unlocked and set_firmware_width_unlockedKyle McMartin2008-10-10
| | | | | | | | | | | | | | These functions are called only when bringing up the monarch cpu, so it is safe to call them without taking the pdc spinlock. In the future, this may become relevant for lockdep, since these functions were taking spinlocks before start_kernel called the lockdep initializers.
| * parisc: move include/asm-parisc to arch/parisc/include/asmKyle McMartin2008-10-10
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| * parisc: move pdc_result to real2.SKyle McMartin2008-10-10
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| * parisc: add arch/parisc/kernel/.gitignoreKyle McMartin2008-10-10
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* | Merge branch 'linux-next' of ↵Linus Torvalds2008-10-20
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (41 commits) PCI: fix pci_ioremap_bar() on s390 PCI: fix AER capability check PCI: use pci_find_ext_capability everywhere PCI: remove #ifdef DEBUG around dev_dbg call PCI hotplug: fix get_##name return value problem PCI: document the pcie_aspm kernel parameter PCI: introduce an pci_ioremap(pdev, barnr) function powerpc/PCI: Add legacy PCI access via sysfs PCI: Add ability to mmap legacy_io on some platforms PCI: probing debug message uniformization PCI: support PCIe ARI capability PCI: centralize the capabilities code in probe.c PCI: centralize the capabilities code in pci-sysfs.c PCI: fix 64-vbit prefetchable memory resource BARs PCI: replace cfg space size (256/4096) by macros. PCI: use resource_size() everywhere. PCI: use same arg names in PCI_VDEVICE comment PCI hotplug: rpaphp: make debug var unique PCI: use %pF instead of print_fn_descriptor_symbol() in quirks.c PCI: fix hotplug get_##name return value problem ...
| * | powerpc/PCI: Add legacy PCI access via sysfsBenjamin Herrenschmidt2008-10-20
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for legacy_io and legacy_mem files in bus class directories in sysfs for powerpc Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * | PCI: Add ability to mmap legacy_io on some platformsBenjamin Herrenschmidt2008-10-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the ability to mmap legacy IO space to the legacy_io files in sysfs on platforms that support it. This will allow to clean up X to use this instead of /dev/mem for legacy IO accesses such as those performed by Int10. While at it I moved pci_create/remove_legacy_files() to pci-sysfs.c where I think they belong, thus making more things statis in there and cleaned up some spurrious prototypes in the ia64 pci.h file Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * | x86/PCI: irq and pci_ids patch for Intel Ibex Peak DeviceIDsSeth Heasley2008-10-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates the Intel Ibex Peak (PCH) LPC and SMBus Controller DeviceIDs. The LPC Controller ID is set by Firmware within the range of 0x3b00-3b1f. This range is included in pci_ids.h using min and max values, and irq.c now has code to handle the range (in lieu of 32 additions to a SWITCH statement). The SMBus Controller ID is a fixed-value and will not change. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * | x86/PCI: follow lspci device/vendor styleBjorn Helgaas2008-10-20
| | | | | | | | | | | | | | | | | | | | | | | | Use "[%04x:%04x]" for PCI vendor/device IDs to follow the format used by lspci(8). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | | Merge branch 'tracing-v28-for-linus' of ↵Linus Torvalds2008-10-20
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits) tracing/fastboot: improve help text tracing/stacktrace: improve help text tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix bootgraph.pl initcall name regexp tracing/fastboot: fix issues and improve output of bootgraph.pl tracepoints: synchronize unregister static inline tracepoints: tracepoint_synchronize_unregister() ftrace: make ftrace_test_p6nop disassembler-friendly markers: fix synchronize marker unregister static inline tracing/fastboot: add better resolution to initcall debug/tracing trace: add build-time check to avoid overrunning hex buffer ftrace: fix hex output mode of ftrace tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix printk format typo in boot tracer ftrace: return an error when setting a nonexistent tracer ftrace: make some tracers reentrant ring-buffer: make reentrant ring-buffer: move page indexes into page headers tracing/fastboot: only trace non-module initcalls ftrace: move pc counter in irqtrace ... Manually fix conflicts: - init/main.c: initcall tracing - kernel/module.c: verbose level vs tracepoints - scripts/bootgraph.pl: fallout from cherry-picking commits.
| * | | ftrace: make ftrace_test_p6nop disassembler-friendlyAnders Kaseorg2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4c3dc21b136f8cb4b72afee16c3ba7e961656c0b in tip introduced the 5-byte NOP ftrace_test_p6nop: jmp . + 5 .byte 0x00, 0x00, 0x00 This is not friendly to disassemblers because an odd number of 0x00s ends in the middle of an instruction boundary. This changes the 0x00s to 1-byte NOPs (0x90). Signed-off-by: Anders Kaseorg <andersk@mit.edu> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | sputrace: use marker_synchronize_unregister()Mathieu Desnoyers2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need a marker_synchronize_unregister() before the end of exit() to make sure every probe callers have exited the non preemptible section and thus are not executing the probe code anymore. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86/ftrace: use uaccess in atomic contextFrédéric Weisbecker2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With latest -tip I get this bug: [ 49.439988] in_atomic():0, irqs_disabled():1 [ 49.440118] INFO: lockdep is turned off. [ 49.440118] Pid: 2814, comm: modprobe Tainted: G W 2.6.27-rc7 #4 [ 49.440118] [<c01215e1>] __might_sleep+0xe1/0x120 [ 49.440118] [<c01148ea>] ftrace_modify_code+0x2a/0xd0 [ 49.440118] [<c01148a2>] ? ftrace_test_p6nop+0x0/0xa [ 49.440118] [<c016e80e>] __ftrace_update_code+0xfe/0x2f0 [ 49.440118] [<c01148a2>] ? ftrace_test_p6nop+0x0/0xa [ 49.440118] [<c016f190>] ftrace_convert_nops+0x50/0x80 [ 49.440118] [<c016f1d6>] ftrace_init_module+0x16/0x20 [ 49.440118] [<c015498b>] load_module+0x185b/0x1d30 [ 49.440118] [<c01767a0>] ? find_get_page+0x0/0xf0 [ 49.440118] [<c02463c0>] ? sprintf+0x0/0x30 [ 49.440118] [<c034e012>] ? mutex_lock_interruptible_nested+0x1f2/0x350 [ 49.440118] [<c0154eb3>] sys_init_module+0x53/0x1b0 [ 49.440118] [<c0352340>] ? do_page_fault+0x0/0x740 [ 49.440118] [<c0104012>] syscall_call+0x7/0xb [ 49.440118] ======================= It is because ftrace_modify_code() calls copy_to_user and copy_from_user. These functions have been inserted after guessing that there couldn't be any race condition but copy_[to/from]_user might sleep and __ftrace_update_code is called with local_irq_saved. These function have been inserted since this commit: d5e92e8978fd2574e415dc2792c5eb592978243d: "ftrace: x86 use copy from user function" Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: suppress trivial sparse signedness warningsHarvey Harrison2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Could just as easily change the three casts to cast to the correct type...this patch changes the type of ftrace_nop instead. Supresses sparse warnings: arch/x86/kernel/ftrace.c:157:14: warning: incorrect type in assignment (different signedness) arch/x86/kernel/ftrace.c:157:14: expected long *static [toplevel] ftrace_nop arch/x86/kernel/ftrace.c:157:14: got unsigned long *<noident> arch/x86/kernel/ftrace.c:161:14: warning: incorrect type in assignment (different signedness) arch/x86/kernel/ftrace.c:161:14: expected long *static [toplevel] ftrace_nop arch/x86/kernel/ftrace.c:161:14: got unsigned long *<noident> arch/x86/kernel/ftrace.c:165:14: warning: incorrect type in assignment (different signedness) arch/x86/kernel/ftrace.c:165:14: expected long *static [toplevel] ftrace_nop arch/x86/kernel/ftrace.c:165:14: got unsigned long *<noident> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | mmiotrace: remove left-over marker cruftPekka Paalanen2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Pekka Paalanen <pq@iki.fi> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86 mmiotrace: implement mmiotrace_printk()Pekka Paalanen2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Offer mmiotrace users a function to inject markers from inside the kernel. This depends on the trace_vprintk() patch. Signed-off-by: Pekka Paalanen <pq@iki.fi> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86 mmiotrace: fix a rare memory leakPekka Paalanen2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Pekka Paalanen <pq@iki.fi> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ftrace: x86 use copy to and from user functionsSteven Rostedt2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The modification of code is performed either by kstop_machine, before SMP starts, or on module code before the module is executed. There is no reason to do the modifications from assembly. The copy to and from user functions are sufficient and produces cleaner and easier to read code. Thanks to Benjamin Herrenschmidt for suggesting the idea. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ftrace: use only 5 byte nops for x86Steven Rostedt2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mathieu Desnoyers revealed a bug in the original code. The nop that is used to relpace the mcount caller can be a two part nop. This runs the risk where a process can be preempted after executing the first nop, but before the second part of the nop. The ftrace code calls kstop_machine to keep multiple CPUs from executing code that is being modified, but it does not protect against a task preempting in the middle of a two part nop. If the above preemption happens and the tracer is enabled, after the kstop_machine runs, all those nops will be calls to the trace function. If the preempted process that was preempted between the two nops is executed again, it will execute half of the call to the trace function, and this might crash the system. This patch instead uses what both the latest Intel and AMD spec suggests. That is the P6_NOP5 sequence of "0x0f 0x1f 0x44 0x00 0x00". Note, some older CPUs and QEMU might fault on this nop, so this nop is executed with fault handling first. If it detects a fault, it will then use the code "0x66 0x66 0x66 0x66 0x90". If that faults, it will then default to a simple "jmp 1f; .byte 0x00 0x00 0x00; 1:". The jmp is not optimal but will do if the first two can not be executed. TODO: Examine the cpuid to determine the nop to use. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ftrace: x86 mcount stubSteven Rostedt2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86 now sets up the mcount locations through the build and no longer needs to record the ip when the function is executed. This patch changes the initial mcount to simply return. There's no need to do any other work. If the ftrace start up test fails, the original mcount will be what everything will use, so having this as fast as possible is a good thing. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ftrace: enable using mcount recording on x86Steven Rostedt2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable the use of the __mcount_loc infrastructure on x86_64 and i386. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ftrace: mark lapic_wd_event() notraceIngo Molnar2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | it can be called in the NMI path: [ 0.645999] calling ftrace_dynamic_init+0x0/0xd6 [ 0.647521] ------------[ cut here ]------------ [ 0.647521] WARNING: at kernel/trace/ftrace.c:348 ftrace_record_ip+0x4e/0x252() [ 0.647521] Modules linked in: [ 0.647521] Pid: 15, comm: kstop1 Not tainted 2.6.27-rc1-tip #22686 [ 0.647521] [ 0.647521] Call Trace: [ 0.647521] <NMI> [<ffffffff8024593f>] warn_on_slowpath+0x5d/0x84 [ 0.647521] [<ffffffff80220b99>] ? lapic_wd_event+0xb/0x5c [ 0.647521] [<ffffffff80287b3b>] ftrace_record_ip+0x4e/0x252 [ 0.647521] [<ffffffff80211274>] mcount_call+0x5/0x31 [ 0.647521] [<ffffffff80220b9e>] ? lapic_wd_event+0x10/0x5c [ 0.647521] [<ffffffff8083f3ec>] nmi_watchdog_tick+0x19d/0x1ad [ 0.647521] [<ffffffff8083e875>] default_do_nmi+0x75/0x1e3 [ 0.647521] [<ffffffff8083f0b3>] do_nmi+0x5d/0x94 [ 0.647521] [<ffffffff8083e2d2>] nmi+0xa2/0xc2 [ 0.647521] [<ffffffff802b48c3>] ? check_bytes_and_report+0x11/0xcc [ 0.647521] <<EOE>> [<ffffffff80211274>] ? mcount_call+0x5/0x31 [ 0.647521] [<ffffffff802b49df>] check_object+0x61/0x1b0 [ 0.647521] [<ffffffff802b502a>] __slab_free+0x169/0x2ae [ 0.647521] [<ffffffff80242dbf>] ? __cleanup_sighand+0x25/0x27 [ 0.647521] [<ffffffff80242dbf>] ? __cleanup_sighand+0x25/0x27 [ 0.647521] [<ffffffff802b60cd>] kmem_cache_free+0x85/0xb9 [ 0.647521] [<ffffffff80242dbf>] __cleanup_sighand+0x25/0x27 [ 0.647521] [<ffffffff80247b3d>] release_task+0x256/0x339 [ 0.647521] [<ffffffff802490b4>] do_exit+0x764/0x7ef [ 0.647521] [<ffffffff8027624c>] __xchg+0x0/0x38 [ 0.647521] [<ffffffff8027619a>] ? stop_cpu+0x0/0xb2 [ 0.647521] [<ffffffff8027619a>] ? stop_cpu+0x0/0xb2 [ 0.647521] [<ffffffff8025922f>] kthread+0x4e/0x7b [ 0.647521] [<ffffffff80212979>] child_rip+0xa/0x11 [ 0.647521] [<ffffffff80211c17>] ? restore_args+0x0/0x30 [ 0.647521] [<ffffffff802283a5>] ? native_load_tls+0x14/0x2e [ 0.647521] [<ffffffff802591e1>] ? kthread+0x0/0x7b [ 0.647521] [<ffffffff8021296f>] ? child_rip+0x0/0x11 [ 0.647521] [ 0.647521] ---[ end trace 4eaa2a86a8e2da22 ]--- [ 0.672032] initcall ftrace_dynamic_init+0x0/0xd6 returned 0 after 19 msecs also mark it no-kprobes while at it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: fix mmiotrace 8-bit register decodingPekka Paalanen2008-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When SIL, DIL, BPL or SPL registers were used in MMIO, the datum was extracted from AH, BH, CH, or DH, which are incorrect. Signed-off-by: Pekka Paalanen <pq@iki.fi> Cc: "Vegard Nossum" <vegard.nossum@gmail.com> Cc: "Steven Rostedt" <srostedt@redhat.com> Cc: proski@gnu.org Cc: "Pekka Enberg" <penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-10-20
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86 ACPI: fix breakage of resume on 64-bit UP systems with SMP kernel Introduce is_vmalloc_or_module_addr() and use with DEBUG_VIRTUAL
| * | | | x86 ACPI: fix breakage of resume on 64-bit UP systems with SMP kernelRafael J. Wysocki2008-10-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86 ACPI: Fix breakage of resume on 64-bit UP systems with SMP kernel We are now using per CPU GDT tables in head_64.S and the original early_gdt_descr.address is invalidated after boot by setup_per_cpu_areas(). This breaks resume from suspend to RAM on x86_64 UP systems using SMP kernels, because this part of head_64.S is also executed during the resume and the invalid GDT address causes the system to crash. It doesn't break on 'true' SMP systems, because early_gdt_descr.address is modified every time native_cpu_up() runs. However, during resume it should point to the GDT of the boot CPU rather than to another CPU's GDT. For this reason, during suspend to RAM always make early_gdt_descr.address point to the boot CPU's GDT. This fixes http://bugzilla.kernel.org/show_bug.cgi?id=11568, which is a regression from 2.6.26. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Reported-and-tested-by: Andy Wettstein <ajw1980@gmail.com>
* | | | | Merge branch 'genirq-v28-for-linus' of ↵Linus Torvalds2008-10-20
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip This merges branches irq/genirq, irq/sparseirq-v4, timers/hpet-percpu and x86/uv. The sparseirq branch is just preliminary groundwork: no sparse IRQs are actually implemented by this tree anymore - just the new APIs are added while keeping the old way intact as well (the new APIs map 1:1 to irq_desc[]). The 'real' sparse IRQ support will then be a relatively small patch ontop of this - with a v2.6.29 merge target. * 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (178 commits) genirq: improve include files intr_remapping: fix typo io_apic: make irq_mis_count available on 64-bit too genirq: fix name space collisions of nr_irqs in arch/* genirq: fix name space collision of nr_irqs in autoprobe.c genirq: use iterators for irq_desc loops proc: fixup irq iterator genirq: add reverse iterator for irq_desc x86: move ack_bad_irq() to irq.c x86: unify show_interrupts() and proc helpers x86: cleanup show_interrupts genirq: cleanup the sparseirq modifications genirq: remove artifacts from sparseirq removal genirq: revert dynarray genirq: remove irq_to_desc_alloc genirq: remove sparse irq code genirq: use inline function for irq_to_desc genirq: consolidate nr_irqs and for_each_irq_desc() x86: remove sparse irq from Kconfig genirq: define nr_irqs for architectures with GENERIC_HARDIRQS=n ...
| * | | | | io_apic: make irq_mis_count available on 64-bit tooIngo Molnar2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | genirq: fix name space collisions of nr_irqs in arch/*Thomas Gleixner2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | local shadows of global variables are _bad_ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | x86: move ack_bad_irq() to irq.cThomas Gleixner2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Share more duplicated code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | x86: unify show_interrupts() and proc helpersThomas Gleixner2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | show_interrupts() and proc helpers are basically the same for 32 and 64 bit. Move them to a shared source file. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | x86: cleanup show_interruptsThomas Gleixner2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sparseirq patches introduced some more ugliness in show_interrupts(). Clean it up all together and make the code easier to read by splitting out the "tail" function which prints the special interrupts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-12 16:49:33 -0400