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trace: Stop compiling in trace_clock unconditionally

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Commit 56449f437 "tracing: make the trace clocks available generally",
in April 2009, made trace_clock available unconditionally, since
CONFIG_X86_DS used it too.

Commit faa4602e47 "x86, perf, bts, mm: Delete the never used BTS-ptrace code",
in March 2010, removed CONFIG_X86_DS, and now only CONFIG_RING_BUFFER (split
out from CONFIG_TRACING for general use) has a dependency on trace_clock. So,
only compile in trace_clock with CONFIG_RING_BUFFER or CONFIG_TRACING
enabled.

Link: http://lkml.kernel.org/r/20120903024513.GA19583@leaf

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Josh Triplett 2012-09-02 19:45:14 -07:00 committed by Steven Rostedt
parent 76bab1b78a
commit ea632e9f12
3 changed files with 7 additions and 6 deletions
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2
kernel/Makefile
View File

@ -98,7 +98,7 @@ obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_TRACE_CLOCK) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_IRQ_WORK) += irq_work.o

5
kernel/trace/Kconfig
View File

@ -62,8 +62,12 @@ config HAVE_C_RECORDMCOUNT
config TRACER_MAX_TRACE
bool
config TRACE_CLOCK
bool
config RING_BUFFER
bool
select TRACE_CLOCK
config FTRACE_NMI_ENTER
bool
@ -114,6 +118,7 @@ config TRACING
select NOP_TRACER
select BINARY_PRINTF
select EVENT_TRACING
select TRACE_CLOCK
config GENERIC_TRACER
bool

6
kernel/trace/Makefile
View File

@ -19,11 +19,7 @@ endif
CFLAGS_trace_events_filter.o := -I$(src)
#
# Make the trace clocks available generally: it's infrastructure
# relied on by ptrace for example:
#
obj-y += trace_clock.o
obj-$(CONFIG_TRACE_CLOCK) += trace_clock.o
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o