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-rw-r--r--kernel/trace/Kconfig43
1 files changed, 28 insertions, 15 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index a508b9d2adb..6e55cc3ac49 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -56,6 +56,13 @@ config CONTEXT_SWITCH_TRACER
select MARKERS
bool
+# All tracer options should select GENERIC_TRACER. For those options that are
+# enabled by all tracers (context switch and event tracer) they select TRACING.
+# This allows those options to appear when no other tracer is selected. But the
+# options do not appear when something else selects it. We need the two options
+# GENERIC_TRACER and TRACING to avoid circular dependencies to accomplish the
+# hidding of the automatic options options.
+
config TRACING
bool
select DEBUG_FS
@@ -66,6 +73,10 @@ config TRACING
select BINARY_PRINTF
select EVENT_TRACING
+config GENERIC_TRACER
+ bool
+ select TRACING
+
#
# Minimum requirements an architecture has to meet for us to
# be able to offer generic tracing facilities:
@@ -95,7 +106,7 @@ config FUNCTION_TRACER
depends on HAVE_FUNCTION_TRACER
select FRAME_POINTER
select KALLSYMS
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
Enable the kernel to trace every kernel function. This is done
@@ -126,7 +137,7 @@ config IRQSOFF_TRACER
depends on TRACE_IRQFLAGS_SUPPORT
depends on GENERIC_TIME
select TRACE_IRQFLAGS
- select TRACING
+ select GENERIC_TRACER
select TRACER_MAX_TRACE
help
This option measures the time spent in irqs-off critical
@@ -147,7 +158,7 @@ config PREEMPT_TRACER
default n
depends on GENERIC_TIME
depends on PREEMPT
- select TRACING
+ select GENERIC_TRACER
select TRACER_MAX_TRACE
help
This option measures the time spent in preemption off critical
@@ -166,7 +177,7 @@ config PREEMPT_TRACER
config SYSPROF_TRACER
bool "Sysprof Tracer"
depends on X86
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
This tracer provides the trace needed by the 'Sysprof' userspace
@@ -174,7 +185,7 @@ config SYSPROF_TRACER
config SCHED_TRACER
bool "Scheduling Latency Tracer"
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
select TRACER_MAX_TRACE
help
@@ -183,6 +194,7 @@ config SCHED_TRACER
config ENABLE_CONTEXT_SWITCH_TRACER
bool "Trace process context switches"
+ depends on !GENERIC_TRACER
select TRACING
select CONTEXT_SWITCH_TRACER
help
@@ -191,6 +203,7 @@ config ENABLE_CONTEXT_SWITCH_TRACER
config ENABLE_EVENT_TRACING
bool "Trace various events in the kernel"
+ depends on !GENERIC_TRACER
select TRACING
help
This tracer hooks to various trace points in the kernel
@@ -204,14 +217,14 @@ config ENABLE_EVENT_TRACING
config FTRACE_SYSCALLS
bool "Trace syscalls"
depends on HAVE_FTRACE_SYSCALLS
- select TRACING
+ select GENERIC_TRACER
select KALLSYMS
help
Basic tracer to catch the syscall entry and exit events.
config BOOT_TRACER
bool "Trace boot initcalls"
- select TRACING
+ select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
help
This tracer helps developers to optimize boot times: it records
@@ -228,7 +241,7 @@ config BOOT_TRACER
config TRACE_BRANCH_PROFILING
bool
- select TRACING
+ select GENERIC_TRACER
choice
prompt "Branch Profiling"
@@ -308,7 +321,7 @@ config BRANCH_TRACER
config POWER_TRACER
bool "Trace power consumption behavior"
depends on X86
- select TRACING
+ select GENERIC_TRACER
help
This tracer helps developers to analyze and optimize the kernels
power management decisions, specifically the C-state and P-state
@@ -342,14 +355,14 @@ config STACK_TRACER
config HW_BRANCH_TRACER
depends on HAVE_HW_BRANCH_TRACER
bool "Trace hw branches"
- select TRACING
+ select GENERIC_TRACER
help
This tracer records all branches on the system in a circular
buffer giving access to the last N branches for each cpu.
config KMEMTRACE
bool "Trace SLAB allocations"
- select TRACING
+ select GENERIC_TRACER
help
kmemtrace provides tracing for slab allocator functions, such as
kmalloc, kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected
@@ -369,7 +382,7 @@ config KMEMTRACE
config WORKQUEUE_TRACER
bool "Trace workqueues"
- select TRACING
+ select GENERIC_TRACER
help
The workqueue tracer provides some statistical informations
about each cpu workqueue thread such as the number of the
@@ -385,7 +398,7 @@ config BLK_DEV_IO_TRACE
select RELAY
select DEBUG_FS
select TRACEPOINTS
- select TRACING
+ select GENERIC_TRACER
select STACKTRACE
help
Say Y here if you want to be able to trace the block layer actions
@@ -446,7 +459,7 @@ config FTRACE_SELFTEST
config FTRACE_STARTUP_TEST
bool "Perform a startup test on ftrace"
- depends on TRACING
+ depends on GENERIC_TRACER
select FTRACE_SELFTEST
help
This option performs a series of startup tests on ftrace. On bootup
@@ -457,7 +470,7 @@ config FTRACE_STARTUP_TEST
config MMIOTRACE
bool "Memory mapped IO tracing"
depends on HAVE_MMIOTRACE_SUPPORT && PCI
- select TRACING
+ select GENERIC_TRACER
help
Mmiotrace traces Memory Mapped I/O access and is meant for
debugging and reverse engineering. It is called from the ioremap