linux/include
Linus Torvalds 14d0ee0517 This contains 4 fixes.
The first two fix the case where full RCU debugging is enabled, enabling
 function tracing causes a live lock of the system. This is due to the added
 debug checks in rcu_dereference_raw() that is used by the function tracer.
 These checks are also traced by the function tracer as well as cause enough
 overhead to the function tracer to slow down the system enough that
 the time to finish an interrupt can take longer than when the next
 interrupt is triggered, causing a live lock from the timer interrupt.
 
 Talking this over with Paul McKenney, we came up with a fix that adds
 a new rcu_dereference_raw_notrace() that does not perform these added checks,
 and let the function tracer use that.
 
 The third commit fixes a failed compile when branch tracing is enabled,
 due to the conversion of the trace_test_buffer() selftest that the
 branch trace wasn't converted for.
 
 The forth patch fixes a bug caught by the RCU lockdep code where a
 rcu_read_lock() is performed when rcu is disabled (either going to
 or from idle, or user space). This happened on the irqsoff tracer
 as it calls task_uid(). The fix here was to use current_uid() when
 possible that doesn't use rcu locking. Which luckily, is always used
 when irqsoff calls this code.
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Merge tag 'trace-fixes-v3.10-rc3-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "This contains 4 fixes.

  The first two fix the case where full RCU debugging is enabled,
  enabling function tracing causes a live lock of the system.  This is
  due to the added debug checks in rcu_dereference_raw() that is used by
  the function tracer.  These checks are also traced by the function
  tracer as well as cause enough overhead to the function tracer to slow
  down the system enough that the time to finish an interrupt can take
  longer than when the next interrupt is triggered, causing a live lock
  from the timer interrupt.

  Talking this over with Paul McKenney, we came up with a fix that adds
  a new rcu_dereference_raw_notrace() that does not perform these added
  checks, and let the function tracer use that.

  The third commit fixes a failed compile when branch tracing is
  enabled, due to the conversion of the trace_test_buffer() selftest
  that the branch trace wasn't converted for.

  The forth patch fixes a bug caught by the RCU lockdep code where a
  rcu_read_lock() is performed when rcu is disabled (either going to or
  from idle, or user space).  This happened on the irqsoff tracer as it
  calls task_uid().  The fix here was to use current_uid() when possible
  that doesn't use rcu locking.  Which luckily, is always used when
  irqsoff calls this code."

* tag 'trace-fixes-v3.10-rc3-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Use current_uid() for critical time tracing
  tracing: Fix bad parameter passed in branch selftest
  ftrace: Use the rcu _notrace variants for rcu_dereference_raw() and friends
  rcu: Add _notrace variation of rcu_dereference_raw() and hlist_for_each_entry_rcu()
2013-06-07 18:46:51 -07:00
..
acpi ACPI / PM: Allow device power states to be used for CONFIG_PM unset 2013-05-22 00:19:28 +02:00
asm-generic arch, mm: Remove tlb_fast_mode() 2013-06-06 10:07:26 +09:00
clocksource ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
crypto crypto: sha512 - Expose generic sha512 routine to be callable from other modules 2013-04-25 21:00:57 +08:00
drm Merge branch 'drm-radeon-sun-hainan' of git://people.freedesktop.org/~airlied/linux 2013-05-21 08:50:57 -07:00
dt-bindings
keys
linux This contains 4 fixes. 2013-06-07 18:46:51 -07:00
math-emu
media Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-05-01 09:57:04 -07:00
memory
misc
net net_sched: restore "overhead xxx" handling 2013-06-02 22:22:35 -07:00
pcmcia
ras
rdma
rxrpc
scsi Merge branch 'postmerge' into for-linus 2013-05-10 07:54:01 -07:00
sound sound fixes for v3.10-rc1 2013-05-10 07:51:56 -07:00
target target: Propigate up ->cmd_kref put return via transport_generic_free_cmd 2013-05-31 01:21:23 -07:00
trace Fixed regressions (two stability regressions and a performance 2013-05-14 09:30:54 -07:00
uapi virtio_console: fix uapi header 2013-05-20 10:25:28 +09:30
video Merge branch 'fbdev-3.10-fixes' of git://gitorious.org/linux-omap-dss2/linux into linux-fbdev/for-3.10-fixes 2013-05-29 17:00:34 +08:00
xen xenbus: delay xenbus frontend resume if xenstored is not running 2013-05-29 09:04:19 -04:00
Kbuild UAPI: remove empty Kbuild files 2013-04-30 17:04:09 -07:00