28 Aug, 2009
1 commit
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Generic support for remapping HPET MSI's by parsing the HPET timer block
device scope in the ACPI DRHD tables. This is needed for platforms
supporting interrupt-remapping and MSI capable HPET timer block.Signed-off-by: Suresh Siddha
Cc: David Woodhouse
Cc: Jesse Barnes
Cc: Venkatesh Pallipadi
Cc: Jay Fenlason
LKML-Reference:
Signed-off-by: Thomas Gleixner
22 Aug, 2009
1 commit
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On 64-bits, using unsigned long when unsigned int suffices
needlessly creates larger code (due to the need for REX
prefixes), and most of the logic in hpet.c really doesn't need
64-bit operations.At once this avoids the need for a couple of type casts.
Signed-off-by: Jan Beulich
Cc: Shaohua Li
Cc: Venkatesh Pallipadi
LKML-Reference:
Signed-off-by: Ingo Molnar
12 Aug, 2009
9 commits
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If CPU support always running local APIC timer, per-cpu hpet
timer could be disabled, which is useless and wasteful in such
case. Let's leave the timers to others.The effect is that we reserve less timers.
Signed-off-by: Shaohua Li
Cc: venkatesh.pallipadi@intel.com
LKML-Reference:
Signed-off-by: Ingo Molnar -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/fyu/linux-2.6:
arch/ia64/kernel/iosapic: missing test after ioremap()
ia64/topology.c: exit cache_add_dev when kobject_init_and_add fails
arch/ia64/Makefile: Remove -mtune=merced in IA64 kernel build
IA64: includecheck fix: ia64, pgtable.h
IA64: includecheck fix: ia64, ia64_ksyms.c
ia64: boolean __test_and_clear_bit
Bug Fix arch/ia64/kernel/pci-dma.c: fix recursive dma_supported() call in iommu_dma_supported() -
Missing test after ioremap()
Signed-off-by: Roel Kluin
Acked-by: Fenghua Yu -
Make cache_add_dev exit sysfs when kobject_init_and_add returns an error.
Signed-off-by: Xiaotian Feng
Signed-off-by: Fenghua Yu -
Between GCC version 3.4.0 and 4.3.3 (including 3.4.0 and 4.3.3), -mtune=merced
is implemented in GCC. Starting from 4.4.0, -mtune=merced is deprecated.Even implemented in versions between 3.4.0 and 4.3.3, the -mtune=merced
feature has been broken in some of the versions. For example, GCC 4.1.2 reports
interanl tuning function errors during kernel building with -mtune=merced. Or
GCC Bugzilla 16130 reports another -mtune=merced issue on GCC 3.4.1.So I would remove the -mtune=merced from IA64 kernel build. Without this option,
kernel on Merced will remain the same except losing an unstable and out-of-date
performance tunning feature.Since GCC version 3.4.0, -mtune=mckinley has been implemented. The
-mtune=mckinley option functions the same as mtune=itanium2. And mtune=itanium2
is the default option. So we don't need to add mtune=mckinley either since its
been the default option in any GCC version which implements this option.Signed-off-by: Fenghua Yu
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fix the following 'make includecheck' warning:
arch/ia64/include/asm/pgtable.h: asm/processor.h is included more than once.
Signed-off-by: Jaswinder Singh Rajput
Acked-by: Fenghua Yu -
fix the following 'make includecheck' warning:
arch/ia64/kernel/ia64_ksyms.c: asm/page.h is included more than once.
Signed-off-by: Jaswinder Singh Rajput
Acked-by: Fenghua Yu -
__test_and_clear_bit() returns a bitfield with the tested-for bit set.
Make it consistent with the other bitops - of ia64 but also every
other architecture - and return a boolean value.Signed-off-by: Johannes Weiner
Acked-by: Fenghua Yu -
In commit 160c1d8e40866edfeae7d68816b7005d70acf391,
dma_ops->dma_supported = iommu_dma_supported;This dma_ops->dma_supported is first called in platform_dma_init() during kernel
boot. Then dma_ops->dma_supported will be called recursively in
iommu_dma_supported.Kernel can not boot because kernel can not get out of iommu_dma_supported until
it runs out of stack memory.Signed-off-by: Fenghua Yu
11 Aug, 2009
10 commits
-
…s/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
SELinux: fix memory leakage in /security/selinux/hooks.c -
Fix memory leakage in /security/selinux/hooks.c
The buffer always needs to be freed here; we either error
out or allocate more memory.Reported-by: iceberg
Signed-off-by: James Morris
Acked-by: Stephen Smalley -
Commit 783ea7d4eeefe895f2731fe73ac951e94418927b
(Driver Core: Rework platform suspend/resume, print warning)
added a warning message printed for platform drivers that use the
legacy PM callbacks rather than struct dev_pm_ops. Unfortunately,
this resulted in some confusion and made some people try to convert
drivers by replacing the old callbacks with struct dev_pm_ops in
automatic way, which generally is not a good idea.Remove the platform device runtime dev_pm_ops warning for now,
because it's annoying to users and it's not really necessary right
now.[rjw: Modified the changelog to be more informative.]
Signed-off-by: Magnus Damm
Acked-by: Greg Kroah-Hartman
Signed-off-by: Rafael J. Wysocki -
Commit d945cb9cc ("pty: Rework the pty layer to use the normal buffering
logic") dropped the test for 'tty->stopped' in pty_write_room(), which
then causes the n_tty line discipline thing to not throttle the data
properly when the tty is stopped.So instead of pausing the write due to the tty being stopped, the ldisc
layer would go ahead and push it down to the pty. The pty write()
routine would then refuse to take the data (because it _did_ check
'stopped'), and the data wouldn't actually be written.This whole stopped test should eventually be moved into the tty ldisc
layer rather than have low-level tty drivers care about these things,
but right now the fix is to just re-instate the missing pty 'stopped'
handling.Reported-and-tested-by: Artur Skawina
Cc: Alan Cox
Signed-off-by: Linus Torvalds -
…x/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
perf_counter: Zero dead bytes from ftrace raw samples size alignment
perf_counter: Subtract the buffer size field from the event record size
perf_counter: Require CAP_SYS_ADMIN for raw tracepoint data
perf_counter: Correct PERF_SAMPLE_RAW output
perf tools: callchain: Fix bad rounding of minimum rate
perf_counter tools: Fix libbfd detection for systems with libz dependency
perf: "Longum est iter per praecepta, breve et efficax per exempla"
perf_counter: Fix a race on perf_counter_ctx
perf_counter: Fix tracepoint sampling to be part of generic sampling
perf_counter: Work around gcc warning by initializing tracepoint record unconditionally
perf tools: callchain: Fix sum of percentages to be 100% by displaying amount of ignored chains in fractal mode
perf tools: callchain: Fix 'perf report' display to be callchain by default
perf tools: callchain: Fix spurious 'perf report' warnings: ignore empty callchains
perf record: Fix the -A UI for empty or non-existent perf.data
perf util: Fix do_read() to fail on EOF instead of busy-looping
perf list: Fix the output to not include tracepoints without an id
perf_counter/powerpc: Fix oops on cpus without perf_counter hardware support
perf stat: Fix tool option consistency: rename -S/--scale to -c/--scale
perf report: Add debug help for the finding of symbol bugs - show the symtab origin (DSO, build-id, kernel, etc)
perf report: Fix per task mult-counter stat reporting
... -
…git/tip/linux-2.6-tip
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86/irq: Fix move_irq_desc() for nodes without ram -
…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: Fix serialization in pit_expect_msb() -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI hotplug: SGI hotplug: do not use hotplug_slot_attr
PCI hotplug: SGI hotplug: fix build failure -
Wei Chong Tan reported a fast-PIT-calibration corner-case:
| pit_expect_msb() is vulnerable to SMI disturbance corner case
| in some platforms which causes /proc/cpuinfo to show wrong
| CPU MHz value when quick_pit_calibrate() jumps to success
| section.I think that the real issue isn't even an SMI - but the fact
that in the very last iteration of the loop, there's no
serializing instruction _after_ the last 'rdtsc'. So even in
the absense of SMI's, we do have a situation where the cycle
counter was read without proper serialization.The last check should be done outside the outer loop, since
_inside_ the outer loop, we'll be testing that the PIT has
the right MSB value has the right value in the next iteration.So only the _last_ iteration is special, because that's the one
that will not check the PIT MSB value any more, and because the
final 'get_cycles()' isn't serialized.In other words:
- I'd like to move the PIT MSB check to after the last
iteration, rather than in every iteration- I think we should comment on the fact that it's also a
serializing instruction and so 'fences in' the TSC read.Here's a suggested replacement.
Signed-off-by: Linus Torvalds
Reported-by: "Tan, Wei Chong"
Tested-by: "Tan, Wei Chong"
LKML-Reference:
Signed-off-by: Ingo Molnar -
…s/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
mm_for_maps: take ->cred_guard_mutex to fix the race with exec
mm_for_maps: shift down_read(mmap_sem) to the caller
mm_for_maps: simplify, use ptrace_may_access()
10 Aug, 2009
19 commits
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* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/dma: pci_set_dma_mask() shouldn't fail if mask fits in RAM -
Fix the following 'make includecheck' warning:
arch/mn10300/include/asm/pci.h: linux/mm.h is included more than once.
Signed-off-by: Jaswinder Singh Rajput
Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
clean up type-casting twice. "size_t" is typedef as "unsigned long" in
64-bit system, and "unsigned int" in 32-bit system, and the intermediate
cast to 'long' is pointless.Signed-off-by: Figo.zhang
Signed-off-by: Linus Torvalds -
This will register the ioctl range used by nilfs2 file system to the
table listed in Documentation/ioctl/ioctl-number.txt.Signed-off-by: Ryusuke Konishi
Signed-off-by: Linus Torvalds -
After aligning the ftrace raw samples, there are dead bytes storing
random data from the stack. We don't want to leak these to userspace,
then zero these out.Before:
0x2de88 [0x50]: event: 9
.
. ... raw event: size 80 bytes
. 0000: 09 00 00 00 01 00 50 00 d0 c7 00 81 ff ff ff ff ......P........
. 0010: 68 01 00 00 68 01 00 00 2c 00 00 00 00 00 00 00 h...h...,......
. 0020: 2c 00 00 00 2b 00 01 02 68 01 00 00 68 01 00 00 ,...+...h...h..
. 0030: 6b 6f 6e 64 65 6d 61 6e 64 2f 30 00 00 00 00 00 kondemand/0....
. 0040: 68 01 00 00 40 7f 46 81 ff ff ff ff 00 10 1b 7f h...@.F........
^ ^ ^ ^
LeakAfter:
0x2d318 [0x50]: event: 9
.
. ... raw event: size 80 bytes
. 0000: 09 00 00 00 01 00 50 00 d0 c7 00 81 ff ff ff ff ......P........
. 0010: 68 01 00 00 68 01 00 00 68 14 00 00 00 00 00 00 h...h...h......
. 0020: 2c 00 00 00 2b 00 01 02 68 01 00 00 68 01 00 00 ,...+...h...h..
. 0030: 6b 6f 6e 64 65 6d 61 6e 64 2f 30 00 00 00 00 00 kondemand/0....
. 0040: 68 01 00 00 a0 80 46 81 ff ff ff ff 00 00 00 00 h.....F........
^ ^ ^ ^
FixedReported-by: Peter Zijlstra
Signed-off-by: Frederic Weisbecker
Cc: Frederic Weisbecker
Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith
LKML-Reference:
Signed-off-by: Ingo Molnar
Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith -
We compute the perf raw sample size by aligning the raw ftrace
event size plus the buffer size field itself. We do that
instead of aligning only the perf raw sample size, so that we
might economize some in some cases.But this buffer size field is not stored in the perf raw
sample, we must then substract its size from the buffer once we
computed the alignment unless we may get a useless u32 field in
the buffer.Signed-off-by: Frederic Weisbecker
Acked-by: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar -
The problem is minor, but without ->cred_guard_mutex held we can race
with exec() and get the new ->mm but check old creds.Now we do not need to re-check task->mm after ptrace_may_access(), it
can't be changed to the new mm under us.Strictly speaking, this also fixes another very minor problem. Unless
security check fails or the task exits mm_for_maps() should never
return NULL, the caller should get either old or new ->mm.Signed-off-by: Oleg Nesterov
Acked-by: Serge Hallyn
Signed-off-by: James Morris -
mm_for_maps() takes ->mmap_sem after security checks, this looks
strange and obfuscates the locking rules. Move this lock to its
single caller, m_start().Signed-off-by: Oleg Nesterov
Acked-by: Serge Hallyn
Signed-off-by: James Morris -
It would be nice to kill __ptrace_may_access(). It requires task_lock(),
but this lock is only needed to read mm->flags in the middle.Convert mm_for_maps() to use ptrace_may_access(), this also simplifies
the code a little bit.Also, we do not need to take ->mmap_sem in advance. In fact I think
mm_for_maps() should not play with ->mmap_sem at all, the caller should
take this lock.With or without this patch, without ->cred_guard_mutex held we can race
with exec() and get the new ->mm but check old creds.Signed-off-by: Oleg Nesterov
Reviewed-by: Serge Hallyn
Signed-off-by: James Morris -
Raw tracepoint data contains various kernel internals and
data from other users, so restrict this to CAP_SYS_ADMIN.Signed-off-by: Peter Zijlstra
Acked-by: Frederic Weisbecker
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar -
PERF_SAMPLE_* output switches should unconditionally output the
correct format, as they are the only way to unambiguously parse
the PERF_EVENT_SAMPLE data.Signed-off-by: Peter Zijlstra
Acked-by: Frederic Weisbecker
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar -
On an iMac G5, the b43 driver is failing to initialise because trying to
set the dma mask to 30-bit fails. Even though there's only 512MiB of RAM
in the machine anyway:
https://bugzilla.redhat.com/show_bug.cgi?id=514787We should probably let it succeed if the available RAM in the system
doesn't exceed the requested limit.Signed-off-by: David Woodhouse
Signed-off-by: Benjamin Herrenschmidt -
* 'for-linus' of git://git.infradead.org/ubi-2.6:
UBI: compatible fallback in absense of sequence numbers
UBI: fix double free on error path -
* 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: Avoid redelivery of edge interrupt before next edge
KVM: MMU: limit rmap chain length
KVM: ia64: fix build failures due to ia64/unsigned long mismatches
KVM: Make KVM_HPAGES_PER_HPAGE unsigned long to avoid build error on powerpc
KVM: fix ack not being delivered when msi present
KVM: s390: fix wait_queue handling
KVM: VMX: Fix locking imbalance on emulation failure
KVM: VMX: Fix locking order in handle_invalid_guest_state
KVM: MMU: handle n_free_mmu_pages > n_alloc_mmu_pages in kvm_mmu_change_mmu_pages
KVM: SVM: force new asid on vcpu migration
KVM: x86: verify MTRR/PAT validity
KVM: PIT: fix kpit_elapsed division by zero
KVM: Fix KVM_GET_MSR_INDEX_LIST -
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/i915: silence vblank warnings
drm: silence pointless vblank warning.
drm: When adding probed modes, preserve duplicate mode types -
…el/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
posix_cpu_timers_exit_group(): Do not use thread_group_cputimer() -
…nel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf_counter: Fix/complete ftrace event records sampling
perf_counter, ftrace: Fix perf_counter integration
tracing/filters: Always free pred on filter_add_subsystem_pred() failure
tracing/filters: Don't use pred on alloc failure
ring-buffer: Fix memleak in ring_buffer_free()
tracing: Fix recordmcount.pl to handle sections with only weak functions
ring-buffer: Fix advance of reader in rb_buffer_peek()
tracing: do not use functions starting with .L in recordmcount.pl
ring-buffer: do not disable ring buffer on oops_in_progress
ring-buffer: fix check of try_to_discard result -
…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: fix buffer overflow in efi_init()
x86: Add quirk to make Apple MacBookPro5,1 use reboot=pci
x86: Fix MSI-X initialization by using online_mask for x2apic target_cpus
x86: Fix VMI && stack protector -
…el/git/tip/linux-2.6-tip
* 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: Fix typos in documentation
lockdep: Fix file mode of lock_stat
rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock()
