trace: mmiotrace to the tracer menu in Kconfig

Impact: cosmetic change in Kconfig menu layout

This patch was originally suggested by Peter Zijlstra, but seems it
was forgotten.

CONFIG_MMIOTRACE and CONFIG_MMIOTRACE_TEST were selectable
directly under the Kernel hacking / debugging menu in the kernel
configuration system. They were present only for x86 and x86_64.

Other tracers that use the ftrace tracing framework are in their own
sub-menu. This patch moves the mmiotrace configuration options there.
Since the Kconfig file, where the tracer menu is, is not architecture
specific, HAVE_MMIOTRACE_SUPPORT is introduced and provided only by
x86/x86_64. CONFIG_MMIOTRACE now depends on it.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 10d6cc3..e1983fa 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -174,28 +174,8 @@ config IOMMU_LEAK
          Add a simple leak tracer to the IOMMU code. This is useful when you
          are debugging a buggy device driver that leaks IOMMU mappings.
 
-config MMIOTRACE
-       bool "Memory mapped IO tracing"
-       depends on DEBUG_KERNEL && PCI
-       select TRACING
-       help
-         Mmiotrace traces Memory Mapped I/O access and is meant for
-         debugging and reverse engineering. It is called from the ioremap
-         implementation and works via page faults. Tracing is disabled by
-         default and can be enabled at run-time.
-
-         See Documentation/tracers/mmiotrace.txt.
-         If you are not helping to develop drivers, say N.
-
-config MMIOTRACE_TEST
-       tristate "Test module for mmiotrace"
-       depends on MMIOTRACE && m
-       help
-         This is a dumb module for testing mmiotrace. It is very dangerous
-         as it will write garbage to IO memory starting at a given address.
-         However, it should be safe to use on e.g. unused portion of VRAM.
-
-         Say N, unless you absolutely know what you are doing.
+config HAVE_MMIOTRACE_SUPPORT
+       def_bool y
 
 #
 # IO delay types:

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index e2a4ff6..58a93fb 100644 (file)
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -302,4 +302,27 @@ config FTRACE_STARTUP_TEST
          functioning properly. It will do tests on all the configured
          tracers of ftrace.
 
+config MMIOTRACE
+       bool "Memory mapped IO tracing"
+       depends on HAVE_MMIOTRACE_SUPPORT && DEBUG_KERNEL && PCI
+       select TRACING
+       help
+         Mmiotrace traces Memory Mapped I/O access and is meant for
+         debugging and reverse engineering. It is called from the ioremap
+         implementation and works via page faults. Tracing is disabled by
+         default and can be enabled at run-time.
+
+         See Documentation/tracers/mmiotrace.txt.
+         If you are not helping to develop drivers, say N.
+
+config MMIOTRACE_TEST
+       tristate "Test module for mmiotrace"
+       depends on MMIOTRACE && m
+       help
+         This is a dumb module for testing mmiotrace. It is very dangerous
+         as it will write garbage to IO memory starting at a given address.
+         However, it should be safe to use on e.g. unused portion of VRAM.
+
+         Say N, unless you absolutely know what you are doing.
+
 endmenu