1 files changed, 28 insertions, 15 deletions

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index a508b9d2adb8..6e55cc3ac49d 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