1. 14 Oct, 2010 1 commit
    • Linus Torvalds's avatar
      Don't dump task struct in a.out core-dumps · 0eead9ab
      Linus Torvalds authored
      akiphie points out that a.out core-dumps have that odd task struct
      dumping that was never used and was never really a good idea (it goes
      back into the mists of history, probably the original core-dumping
      code).  Just remove it.
      
      Also do the access_ok() check on dump_write().  It probably doesn't
      matter (since normal filesystems all seem to do it anyway), but he
      points out that it's normally done by the VFS layer, so ...
      
      [ I suspect that we should possibly do "vfs_write()" instead of
        calling ->write directly.  That also does the whole fsnotify and write
        statistics thing, which may or may not be a good idea. ]
      
      And just to be anal, do this all for the x86-64 32-bit a.out emulation
      code too, even though it's not enabled (and won't currently even
      compile)
      Reported-by: default avatarakiphie <akiphie@lavabit.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0eead9ab
  2. 13 Oct, 2010 9 commits
  3. 12 Oct, 2010 13 commits
    • Russell King's avatar
      ARM: relax ioremap prohibition (309caa9c) for -final and -stable · 06c10884
      Russell King authored
      ... but produce a big warning about the problem as encouragement
      for people to fix their drivers.
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      06c10884
    • Russell King's avatar
    • Mika Westerberg's avatar
      ARM: 6440/1: ep93xx: DMA: fix channel_disable · 10d48b39
      Mika Westerberg authored
      When channel_disable() is called, it disables per channel interrupts and
      waits until channels state becomes STATE_STALL, and then disables the
      channel. Now, if the DMA transfer is disabled while the channel is in
      STATE_NEXT we will not wait anything and disable the channel immediately.
      This seems to cause weird data corruption for example in audio transfers.
      
      Fix is to wait while we are in STATE_NEXT or STATE_ON and only then
      disable the channel.
      Signed-off-by: default avatarMika Westerberg <mika.westerberg@iki.fi>
      Acked-by: default avatarRyan Mallon <ryan@bluewatersys.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      10d48b39
    • Linus Torvalds's avatar
      Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 0acc1b2a
      Linus Torvalds authored
      * 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: x86: Move TSC reset out of vmcb_init
        KVM: x86: Fix SVM VMCB reset
      0acc1b2a
    • Steven Rostedt's avatar
      ring-buffer: Fix typo of time extends per page · d0134324
      Steven Rostedt authored
      Time stamps for the ring buffer are created by the difference between
      two events. Each page of the ring buffer holds a full 64 bit timestamp.
      Each event has a 27 bit delta stamp from the last event. The unit of time
      is nanoseconds, so 27 bits can hold ~134 milliseconds. If two events
      happen more than 134 milliseconds apart, a time extend is inserted
      to add more bits for the delta. The time extend has 59 bits, which
      is good for ~18 years.
      
      Currently the time extend is committed separately from the event.
      If an event is discarded before it is committed, due to filtering,
      the time extend still exists. If all events are being filtered, then
      after ~134 milliseconds a new time extend will be added to the buffer.
      
      This can only happen till the end of the page. Since each page holds
      a full timestamp, there is no reason to add a time extend to the
      beginning of a page. Time extends can only fill a page that has actual
      data at the beginning, so there is no fear that time extends will fill
      more than a page without any data.
      
      When reading an event, a loop is made to skip over time extends
      since they are only used to maintain the time stamp and are never
      given to the caller. As a paranoid check to prevent the loop running
      forever, with the knowledge that time extends may only fill a page,
      a check is made that tests the iteration of the loop, and if the
      iteration is more than the number of time extends that can fit in a page
      a warning is printed and the ring buffer is disabled (all of ftrace
      is also disabled with it).
      
      There is another event type that is called a TIMESTAMP which can
      hold 64 bits of data in the theoretical case that two events happen
      18 years apart. This code has not been implemented, but the name
      of this event exists, as well as the structure for it. The
      size of a TIMESTAMP is 16 bytes, where as a time extend is only
      8 bytes. The macro used to calculate how many time extends can fit on
      a page used the TIMESTAMP size instead of the time extend size
      cutting the amount in half.
      
      The following test case can easily trigger the warning since we only
      need to have half the page filled with time extends to trigger the
      warning:
      
       # cd /sys/kernel/debug/tracing/
       # echo function > current_tracer
       # echo 'common_pid < 0' > events/ftrace/function/filter
       # echo > trace
       # echo 1 > trace_marker
       # sleep 120
       # cat trace
      
      Enabling the function tracer and then setting the filter to only trace
      functions where the process id is negative (no events), then clearing
      the trace buffer to ensure that we have nothing in the buffer,
      then write to trace_marker to add an event to the beginning of a page,
      sleep for 2 minutes (only 35 seconds is probably needed, but this
      guarantees the bug), and then finally reading the trace which will
      trigger the bug.
      
      This patch fixes the typo and prevents the false positive of that warning.
      Reported-by: default avatarHans J. Koch <hjk@linutronix.de>
      Tested-by: default avatarHans J. Koch <hjk@linutronix.de>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Stable Kernel <stable@kernel.org>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      d0134324
    • Deng-Cheng Zhu's avatar
      perf, MIPS: Support cross compiling of tools/perf for MIPS · c1e028ef
      Deng-Cheng Zhu authored
      Changes:
       v4: Fix the cosmetic issue of redundant dot-ops
       v3: Change rmb() to use SYNC
       v2: Include mips unistd.h and define rmb()/cpu_relax() in tools/perf/perf.h
      Signed-off-by: default avatarDeng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Cc: David Daney <ddaney@caviumnetworks.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c1e028ef
    • Jean Delvare's avatar
      drm/radeon/kms: Silent spurious error message · a8c051f0
      Jean Delvare authored
      I see the following error message in my kernel log from time to time:
      radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait
      radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait
      
      After investigation, it turns out that there's nothing to be afraid of
      and everything works as intended. So remove the spurious log message.
      Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
      Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      a8c051f0
    • Alex Deucher's avatar
      d31dba58
    • Alex Deucher's avatar
      drm/radeon/kms: make TV/DFP table info less verbose · 40f76d81
      Alex Deucher authored
      Make TV standard and DFP table revisions debug only.
      Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      40f76d81
    • Alex Deucher's avatar
      drm/radeon/kms: leave certain CP int bits enabled · 3555e53b
      Alex Deucher authored
      These bits are used for internal communication and should
      be left enabled.  This may fix s/r issues on some systems.
      Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      3555e53b
    • Jerome Glisse's avatar
      drm/radeon/kms: avoid corner case issue with unmappable vram V2 · c919b371
      Jerome Glisse authored
      We should not allocate any object into unmappable vram if we
      have no means to access them which on all GPU means having the
      CP running and on newer GPU having the blit utility working.
      
      This patch limit the vram allocation to visible vram until
      we have acceleration up and running.
      
      Note that it's more than unlikely that we run into any issue
      related to that as when acceleration is not woring userspace
      should allocate any object in vram beside front buffer which
      should fit in visible vram.
      
      V2 use real_vram_size as mc_vram_size could be bigger than
         the actual amount of vram
      
      [airlied: fixup r700_cp_stop case]
      Signed-off-by: default avatarJerome Glisse <jglisse@redhat.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      c919b371
    • John Blackwood's avatar
      perf: Fix incorrect copy_from_user() usage · ad0cf347
      John Blackwood authored
      perf events: repair incorrect use of copy_from_user
      
      This makes the perf_event_period() return 0 instead of
      -EFAULT on success.
      
      Signed-off-by: John Blackwood<john.blackwood@ccur.com>
      Signed-off-by: default avatarJoe Korty <joe.korty@ccur.com>
      Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <20100928220311.GA18145@tsunami.ccur.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      ad0cf347
    • Eric Paris's avatar
      fanotify: disable fanotify syscalls · 7c534773
      Eric Paris authored
      This patch disables the fanotify syscalls by just not building them and
      letting the cond_syscall() statements in kernel/sys_ni.c redirect them
      to sys_ni_syscall().
      
      It was pointed out by Tvrtko Ursulin that the fanotify interface did not
      include an explicit prioritization between groups.  This is necessary
      for fanotify to be usable for hierarchical storage management software,
      as they must get first access to the file, before inotify-like notifiers
      see the file.
      
      This feature can be added in an ABI compatible way in the next release
      (by using a number of bits in the flags field to carry the info) but it
      was suggested by Alan that maybe we should just hold off and do it in
      the next cycle, likely with an (new) explicit argument to the syscall.
      I don't like this approach best as I know people are already starting to
      use the current interface, but Alan is all wise and noone on list backed
      me up with just using what we have.  I feel this is needlessly ripping
      the rug out from under people at the last minute, but if others think it
      needs to be a new argument it might be the best way forward.
      
      Three choices:
      Go with what we got (and implement the new feature next cycle).  Add a
      new field right now (and implement the new feature next cycle).  Wait
      till next cycle to release the ABI (and implement the new feature next
      cycle).  This is number 3.
      Signed-off-by: default avatarEric Paris <eparis@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7c534773
  4. 11 Oct, 2010 11 commits
  5. 10 Oct, 2010 1 commit
  6. 09 Oct, 2010 5 commits