- 13 2月, 2009 1 次提交
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由 Philippe Gerum 提交于
Fix _PAGE_CHG_MASK so that pte_modify() does not affect the _PAGE_SPECIAL bit. Signed-off-by: NPhilippe Gerum <rpm@xenomai.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 11 2月, 2009 6 次提交
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由 Martin Schwidefsky 提交于
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sachin Sant 提交于
Embed init_irq_proc(s390) within CONFIG_PROC_FS to fix a build break. Signed-off-by : Sachin Sant <sachinp@in.ibm.com>
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由 Martin Schwidefsky 提交于
The vdso_per_cpu_data entry in the lowcore structure uses __u32 instead of __u64. If the data page is above 4GB the pointer is truncated and the kernel crashes. Reported-by: NMijo Safradin <mijo@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Steven Rostedt 提交于
The constraint used for retrieving and restoring the parent function pointer is incorrect. The parent variable is a pointer, and the address of the pointer is modified by the asm statement and not the pointer itself. It is incorrect to pass it in as an output constraint since the asm will never update the pointer. Signed-off-by: NSteven Rostedt <srostedt@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Kumar Gala 提交于
The following commit: commit 64b3d0e8 Author: Benjamin Herrenschmidt <benh@kernel.crashing.org> Date: Thu Dec 18 19:13:51 2008 +0000 powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED broke setting of the _PAGE_COHERENT bit in the PPC HW PTE. Since we now actually set _PAGE_COHERENT in the Linux PTE we shouldn't be clearing it out before we propogate it to the PPC HW PTE. Reported-by: NMartyn Welch <martyn.welch@gefanuc.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Steven Rostedt 提交于
Impact: fix to prevent a kernel crash on fault If for some reason the pointer to the parent function on the stack takes a fault, the fix up code will not return back to the original faulting code. This can lead to unpredictable results and perhaps even a kernel panic. A fault should not happen, but if it does, we should simply disable the tracer, warn, and continue running the kernel. It should not lead to a kernel crash. Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
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- 10 2月, 2009 11 次提交
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由 Clemens Ladisch 提交于
In i8237A_resume(), when resetting the DMA controller, the parameters to dma_outb() were mixed up. Signed-off-by: NClemens Ladisch <clemens@ladisch.de> [ cleaned up the file a tiny bit. ] Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tobias Klauser 提交于
The C99 specification states in section 6.11.5: The placement of a storage-class specifier other than at the beginning of the declaration specifiers in a declaration is an obsolescent feature. Signed-off-by: NTobias Klauser <tklauser@distanz.ch> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Michael Neuling 提交于
arch/powerpc/platforms/pseries/hotplug-memory.c uses remove_section_mapping() but doesn't include sparsemem.h which defines it. This can cause compilation fails for some configs. Signed-off-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
The new legacy_mem file in sysfs is causing problems with X on machines that don't support legacy memory access. The way I initially implemented it, we would fail with -ENXIO when trying to mmap it, thus exposing to X that we do support the API but there is no legacy memory. Unfortunately, X poor error handling is causing it to fail to start when it gets this error. This implements a workaround hack that instead maps anonymous memory instead (using shmem if VM_SHARED is set, just like /dev/zero does). Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Michael Neuling 提交于
arch/powerpc/oprofile/cell/spu_profiler.c is missing a asm/time.h include which is required for ppc_proc_freq. This can cause compile failures for some config combinations. Signed-off-by: NMichael Neuling <mikey@neuling.org> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Steven Rostedt 提交于
Impact: fix dynamic ftrace with large modules in PPC64 The math to calculate the offset into the TOC that is taken from reading the trampoline is incorrect. The bottom half of the offset is a signed extended short. The current code was using an OR to create the offset when it should have been using an addition. Signed-off-by: NSteven Rostedt <srostedt@redhat.com> Acked-by: NGeoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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Currently emulate_step() emulates mr. instructions without updating cr0 and this can be disastrous. Don't emulate mr. This bug has been around for a while, but I am not sure if its a worthy -stable candidate. I'll leave it to Ben do decide. Signed-off-by: NAnanth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Kumar Gala 提交于
Fixed v_mapped_by_tlbcam() and p_mapped_by_tlbcam() to use phys_addr_t instead of unsigned long. In 36-bit physical mode we really need these functions to deal with phys_addr_t when trying to match a physical address or when returning one. Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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由 Tejun Heo 提交于
do_device_not_available() is the handler for #NM and it declares that it takes a unsigned long and calls math_emu(), which takes a long argument and surprisingly expects the stack frame starting at the zero argument would match struct math_emu_info, which isn't true regardless of configuration in the current code. This patch makes do_device_not_available() take struct pt_regs like other exception handlers and initialize struct math_emu_info with pointer to it and pass pointer to the math_emu_info to math_emulate() like normal C functions do. This way, unless gcc makes a copy of struct pt_regs in do_device_not_available(), the register frame is correctly accessed regardless of kernel configuration or compiler used. This doesn't fix all math_emu problems but it at least gets it somewhat working. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 David Howells 提交于
in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now. Signed-off-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Kyle McMartin 提交于
Architectures other than mips and x86 are not using ticket spinlocks. Therefore, the contention on the lock is meaningless, since there is nobody known to be waiting on it (arguably /fairly/ unfair locks). Dummy it out to return 0 on other architectures. Signed-off-by: NKyle McMartin <kyle@redhat.com> Acked-by: NRalf Baechle <ralf@linux-mips.org> Acked-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 09 2月, 2009 7 次提交
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由 Tejun Heo 提交于
Impact: cleanup * Come on, struct info? s/struct info/struct math_emu_info/ * Use struct pt_regs and kernel_vm86_regs instead of defining its own register frame structure. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
Impact: dump the correct %gs into a.out core dump aout_dump_thread() read %gs but didn't include it in core dump. Fix it. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Alok Kataria 提交于
Commit 6194ba6f ("x86: don't special-case pmd allocations as much") made changes to the way we handle pmd allocations, and while doing that it dropped a call to paravirt_release_pd on the pgd page from the pgd_dtor code path. As a result of this missing release, the hypervisor is now unaware of the pgd page being freed, and as a result it ends up tracking this page as a page table page. After this the guest may start using the same page for other purposes, and depending on what use the page is put to, it may result in various performance and/or functional issues ( hangs, reboots). Since this release is only required for VMI, I now release the pgd page from the (vmi)_pgd_free hook. Signed-off-by: NAlok N Kataria <akataria@vmware.com> Acked-by: NJeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: NIngo Molnar <mingo@elte.hu> Cc: <stable@kernel.org>
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由 Yinghai Lu 提交于
Impact: find right nr_irqs_gsi on some systems. One test-system has gap between gsi's: [ 0.000000] ACPI: IOAPIC (id[0x04] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 4, version 0, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: IOAPIC (id[0x05] address[0xfeafd000] gsi_base[48]) [ 0.000000] IOAPIC[1]: apic_id 5, version 0, address 0xfeafd000, GSI 48-54 [ 0.000000] ACPI: IOAPIC (id[0x06] address[0xfeafc000] gsi_base[56]) [ 0.000000] IOAPIC[2]: apic_id 6, version 0, address 0xfeafc000, GSI 56-62 ... [ 0.000000] nr_irqs_gsi: 38 So nr_irqs_gsi is not right. some irq for MSI will overwrite with io_apic. need to get that with acpi_probe_gsi when acpi io_apic is used Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pallipadi, Venkatesh 提交于
For Intel 7400 series CPUs, the recommendation is to use a clflush on the monitored address just before monitor and mwait pair [1]. This clflush makes sure that there are no false wakeups from mwait when the monitored address was recently written to. [1] "MONITOR/MWAIT Recommendations for Intel Xeon Processor 7400 series" section in specification update document of 7400 series http://download.intel.com/design/xeon/specupdt/32033601.pdfSigned-off-by: NVenkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 David S. Miller 提交于
This is based upon a report from Chris Torek and his initial patch. From Chris's report: -------------------- This came up in testing kgdb, using the built-in tests -- turn on CONFIG_KGDB_TESTS, then echo V1 > /sys/module/kgdbts/parameters/kgdbts -- but it would affect using kgdb if you were debugging and looking at bad pointers. -------------------- When we get a copy_{from,to}_user() request and the %asi is set to something other than ASI_AIUS (which is userspace) then we branch off to a routine called memcpy_user_stub(). It just does a straight memcpy since we are copying from kernel to kernel in this case. The logic was that since source and destination are both kernel pointers we don't need to have exception checks. But for what probe_kernel_{read,write}() is trying to do, we have to have the checks, otherwise things like kgdb bad kernel pointer accesses don't do the right thing. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This is an implementation of a suggestion made by Chris Torek: -------------------- Something else I noticed in passing: the EX and EX_LD/EX_ST macros scattered throughout the various .S files make a fair bit of .fixup code, all of which does the same thing. At the cost of one symbol in copy_in_user.S, you could just have one common two-instruction retl-and-mov-1 fixup that they all share. -------------------- The following is with a defconfig build: text data bss dec hex filename 3972767 344024 584449 4901240 4ac978 vmlinux.orig 39688877 344024 584449 4897360 4aba50 vmlinux Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 07 2月, 2009 6 次提交
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由 Roland McGrath 提交于
One of my past fixes to this code introduced a different new bug. When using 32-bit "int $0x80" entry for a bogus syscall number, the return value is not correctly set to -ENOSYS. This only happens when neither syscall-audit nor syscall tracing is enabled (i.e., never seen if auditd ever started). Test program: /* gcc -o int80-badsys -m32 -g int80-badsys.c Run on x86-64 kernel. Note to reproduce the bug you need auditd never to have started. */ #include <errno.h> #include <stdio.h> int main (void) { long res; asm ("int $0x80" : "=a" (res) : "0" (99999)); printf ("bad syscall returns %ld\n", res); return res != -ENOSYS; } The fix makes the int $0x80 path match the sysenter and syscall paths. Reported-by: NDmitry V. Levin <ldv@altlinux.org> Signed-off-by: NRoland McGrath <roland@redhat.com>
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由 Julia Lawall 提交于
Taking sizeof the result of sizeof is quite strange and does not seem to be what is wanted here. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; @@ - sizeof ( sizeof (E) - ) @@ type T; @@ - sizeof ( sizeof (T) - ) // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Acked-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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由 paulfax 提交于
This is a simple change to correct problems when using set_irq_type on platforms using CPM2. This code corrects the problem on most platform but may have issues on 8272 derived platforms for some interrupts. On 8272 PC2 & 3 are missing and PC 23 & 29 are added, which this patch does not address. Signed-off-by: NPaul Bilke <paul@conspiracy.net> Reviewed-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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由 Anton Vorontsov 提交于
TSEC0 is connected to Vitesse 7385 5-port switch. The switch isn't connected to any mdio bus, the link to the switch is fixed to Full-duplex 1000 Mb/s (no pause). This patch fixes following failure during bootup: mdio@24520:01 not found eth0: Could not attach to PHY IP-Config: Failed to open eth0 Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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由 Anton Vorontsov 提交于
commit b31a1d8b ("gianfar: Convert gianfar to an of_platform_driver") introduced a child node for the ethernet@25000 controller, but no address and size cells specifiers were added, and that makes dtc unhappy: DTC: dts->dtb on file "arch/powerpc/boot/dts/mpc8313erdb.dts" Warning (reg_format): "reg" property in /soc8313@e0000000/ethernet@25000/mdio@25520 has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1) Warning (avoid_default_addr_size): Relying on default #address-cells value for /soc8313@e0000000/ethernet@25000/mdio@25520 Warning (avoid_default_addr_size): Relying on default #size-cells value for /soc8313@e0000000/ethernet@25000/mdio@25520 Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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由 Michael Neuling 提交于
I noticed this doing some randconfig testing (.config below). I have CONFIG_PM but no CONFIG_SUSPEND. Bug is against mainline. arch/powerpc/sysdev/built-in.o: In function `ipic_suspend': ipic.c:(.text+0x6b34): undefined reference to `fsl_deep_sleep' make[1]: *** [.tmp_vmlinux1] Error 1 make: *** [sub-make] Error 2 Looks like #ifdef CONFIG_PM in arch/powerpc/sysdev/ipic.c should be CONFIG_SUSPEND. d49747bd introduced this. Fix build when we have CONFIG_PM but no CONFIG_SUSPEND. Signed-off-by: NMichael Neuling <mikey@neuling.org> Acked-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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- 06 2月, 2009 5 次提交
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由 Pavel Emelyanov 提交于
Implement Linus's suggestion: introduce the hpet_cnt_ahead() helper function to compare hpet time values - like other wrapping counter comparisons are abstracted away elsewhere. (jiffies, ktime_t, etc.) Reported-by: NKirill Korotaev <dev@openvz.org> Signed-off-by: NPavel Emelyanov <xemul@openvz.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 David S. Miller 提交于
They can't be used for profiling and NMI watchdog currently since they lack the counter overflow interrupt. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Masami Hiramatsu 提交于
Prevent kprobes from catching spurious faults which will cause infinite recursive page-fault and memory corruption by stack overflow. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> Cc: <stable@kernel.org> [2.6.28.x] Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alexey Dobriyan 提交于
Do usual do {} while (0) dance, otherwise fs/gfs2/util.c:99: error: expected expression before 'else' drivers/scsi/lpfc/lpfc_sli.c:363: error: expected expression before 'else' Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Acked-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Mark Langsdorf 提交于
At this time, the PowerNow! driver for K8 uses an experimentally derived formula to calculate transition latency. The value it provides is orders of magnitude too large on modern systems. This patch replaces the formula with ACPI _PSS latency values for more accuracy and better performance. I've tested it on two 2nd generation Opteron systems, a 3rd generation Operton system, and a Turion X2 without seeing any stability problems. Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: NThomas Renninger <trenn@suse.de> Signed-off-by: NDave Jones <davej@redhat.com>
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- 05 2月, 2009 4 次提交
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由 Kyle McMartin 提交于
Due to recurring issues with DMAR support on certain platforms. There's a number of filesystem corruption incidents reported: https://bugzilla.redhat.com/show_bug.cgi?id=479996 http://bugzilla.kernel.org/show_bug.cgi?id=12578 Provide a Kconfig option to change whether it is enabled by default. If disabled, it can still be reenabled by passing intel_iommu=on to the kernel. Keep the .config option off by default. Signed-off-by: NKyle McMartin <kyle@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Acked-By: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Jeremy Fitzhardinge 提交于
On an x86 system which doesn't support global mappings, __supported_pte_mask has _PAGE_GLOBAL clear, to make sure it never appears in the PTE. pfn_pte() and so on will enforce it with: static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) { return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & __supported_pte_mask); } However, we overload _PAGE_GLOBAL with _PAGE_PROTNONE on non-present ptes to distinguish them from swap entries. However, applying __supported_pte_mask indiscriminately will clear the bit and corrupt the pte. I guess the best fix is to only apply __supported_pte_mask to present ptes. This seems like the right solution to me, as it means we can completely ignore the issue of overlaps between the present pte bits and the non-present pte-as-swap entry use of the bits. __supported_pte_mask contains the set of flags we support on the current hardware. We also use bits in the pte for things like logically present ptes with no permissions, and swap entries for swapped out pages. We should only apply __supported_pte_mask to present ptes, because otherwise we may destroy other information being stored in the ptes. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Timothy S. Nelson 提交于
This patch makes the ROM reading code return an error to user space if the size of the ROM read is equal to 0. The patch also emits a warnings if the contents of the ROM are invalid, and documents the effects of the "enable" file on ROM reading. Signed-off-by: NTimothy S. Nelson <wayland@wayland.id.au> Acked-by: NAlex Villacis-Lasso <a_villacis@palosanto.com> Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
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由 Alex Chiang 提交于
Fix user-visible grammo. Signed-off-by: NAlex Chiang <achiang@hp.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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