Merge tag 'intc-for-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers

Merge "omap intc changes for v3.18 merge window" from Tony Lindgren:

Interrupt code related clean-up for omap2 and 3 to make
it ready to move to drivers/irqchip. Note that this series
does not yet move the interrupt code to drivers, that will
be posted separately as a follow-up series.

Note that this branch has a dependency to patches both
in fixes-v3.18-not-urgent and soc-for-v3.18 and is based on
a merge. Without doing the merge, off-idle would not work
properly for git bisect.

* tag 'intc-for-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (325 commits)
  arm: omap: intc: switch over to linear irq domain
  arm: omap: irq: get rid of ifdef hack
  arm: omap: irq: introduce omap_nr_pending
  arm: omap: irq: remove nr_irqs argument
  arm: omap: irq: remove unnecessary header
  arm: omap: irq: drop omap2_intc_handle_irq()
  arm: omap: irq: drop omap3_intc_handle_irq()
  arm: omap: irq: call set_handle_irq() from .init_irq
  arm: omap: irq: move some more code around
  arm: boot: dts: omap2/3/am33xx: drop ti,intc-size
  arm: omap: irq: drop ti,intc-size support
  arm: boot: dts: am33xx/omap3: fix intc compatible flag
  arm: omap: irq: use compatible flag to figure out number of IRQ lines
  arm: omap: irq: add specific compatibles for omap3 and am33xx devices
  arm: omap: irq: drop .handle_irq and .init_irq fields
  arm: omap: irq: use IRQCHIP_DECLARE macro
  arm: omap: irq: call set_handle_irq() from intc_of_init
  arm: omap: irq: make intc_of_init static
  arm: omap: irq: reorganize code a little bit
  arm: omap: irq: always define omap3 support
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 07c28323f88f..a28590083622 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -892,6 +892,10 @@ config DEBUG_WW_MUTEX_SLOWPATH
          the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
          will test all possible w/w mutex interface abuse with the
          exception of simply not acquiring all the required locks.
+         Note that this feature can introduce significant overhead, so
+         it really should not be enabled in a production or distro kernel,
+         even a debug kernel.  If you are a driver writer, enable it.  If
+         you are a distro, do not.
 
 config DEBUG_LOCK_ALLOC
         bool "Lock debugging: detect incorrect freeing of live locks"
@@ -1032,8 +1036,13 @@ config TRACE_IRQFLAGS
           either tracing or lock debugging.
 
 config STACKTRACE
-        bool
+        bool "Stack backtrace support"
         depends on STACKTRACE_SUPPORT
+        help
+          This option causes the kernel to create a /proc/pid/stack for
+          every process, showing its current stack trace.
+          It is also used by various kernel debugging features that require
+          stack trace generation.
 
 config DEBUG_KOBJECT
         bool "kobject debugging"