linux/arch/x86
Linus Torvalds 9bd01b9bbd Two fixes in the tracing utility.
The first is a fix for the way the ring buffer stores timestamps.
 After a restructure of the code was done, the ring buffer timestamp
 logic missed the fact that the first event on a sub buffer is to have
 a zero delta, as the full timestamp is stored on the sub buffer itself.
 But because the delta was not cleared to zero, the timestamp for that
 event will be calculated as the real timestamp + the delta from the
 last timestamp. This can skew the timestamps of the events and
 have them say they happened when they didn't really happen. That's bad.
 
 The second fix is for modifying the function graph caller site.
 When the stop machine was removed from updating the function tracing
 code, it missed updating the function graph call site location.
 It is still modified as if it is being done via stop machine. But it's not.
 This can lead to a GPF and kernel crash if the function graph call site
 happens to lie between cache lines and one CPU is executing it while
 another CPU is doing the update. It would be a very hard condition to
 hit, but the result is sever enough to have it fixed ASAP.
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Merge tag 'trace-fixes-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull twi tracing fixes from Steven Rostedt:
 "Two urgent fixes in the tracing utility.

  The first is a fix for the way the ring buffer stores timestamps.
  After a restructure of the code was done, the ring buffer timestamp
  logic missed the fact that the first event on a sub buffer is to have
  a zero delta, as the full timestamp is stored on the sub buffer
  itself.  But because the delta was not cleared to zero, the timestamp
  for that event will be calculated as the real timestamp + the delta
  from the last timestamp.  This can skew the timestamps of the events
  and have them say they happened when they didn't really happen.
  That's bad.

  The second fix is for modifying the function graph caller site.  When
  the stop machine was removed from updating the function tracing code,
  it missed updating the function graph call site location.  It is still
  modified as if it is being done via stop machine.  But it's not.  This
  can lead to a GPF and kernel crash if the function graph call site
  happens to lie between cache lines and one CPU is executing it while
  another CPU is doing the update.  It would be a very hard condition to
  hit, but the result is severe enough to have it fixed ASAP"

* tag 'trace-fixes-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace/x86: Use breakpoints for converting function graph caller
  ring-buffer: Fix first commit on sub-buffer having non-zero delta
2014-02-15 15:03:34 -08:00
..
boot x86, boot: Fix word-size assumptions in has_eflag() inline asm 2014-01-30 08:04:32 -08:00
configs
crypto
ia32
include Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-02-15 15:02:28 -08:00
kernel Two fixes in the tracing utility. 2014-02-15 15:03:34 -08:00
kvm kvm: x86: move KVM_CAP_HYPERV_TIME outside #ifdef 2014-01-29 18:10:45 +01:00
lguest x86, asmlinkage, lguest: Fix C functions used by inline assembler 2014-01-29 22:17:17 -08:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
math-emu x86: math-emu: Drop already-disabled print of build date 2014-01-27 23:14:12 +01:00
mm x86, smap: smap_violation() is bogus if CONFIG_X86_SMAP is off 2014-02-13 08:40:52 -08:00
net
oprofile
pci ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
platform x86/efi: Check status field to validate BGRT header 2014-02-14 10:07:15 +00:00
power
realmode Merge commit 'f4bcd8ccddb02833340652e9f46f5127828eb79d' into x86/build 2014-01-29 09:07:00 -08:00
syscalls
tools Merge commit 'f4bcd8ccddb02833340652e9f46f5127828eb79d' into x86/build 2014-01-29 09:07:00 -08:00
um
vdso
video
xen xen: properly account for _PAGE_NUMA during xen pte translations 2014-02-10 16:01:41 -08:00
.gitignore
Kbuild
Kconfig * Avoid WARN_ON() when mapping BGRT on Baytrail (EFI 32-bit). 2014-02-07 11:27:30 -08:00
Kconfig.cpu
Kconfig.debug x86: Disable CONFIG_X86_DECODER_SELFTEST in allmod/allyesconfigs 2014-02-05 14:10:30 -08:00
Makefile x86, build: Build 16-bit code with -m16 where possible 2014-01-30 08:05:36 -08:00
Makefile.um
Makefile_32.cpu