linux-kernel - [PATCH] perf callchain: fixup help/config for no-unwinding

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Date:	Wed, 10 Aug 2016 15:52:28 +0200
From:	Rabin Vincent <rabin.vincent@...s.com>
To:	acme@...nel.org
Cc:	hekuang@...wei.com, linux-kernel@...r.kernel.org,
	Rabin Vincent <rabinv@...s.com>
Subject: [PATCH] perf callchain: fixup help/config for no-unwinding

From: Rabin Vincent <rabinv@...s.com>

Since 841e3558b2d ("perf callchain: Recording 'dwarf' callchains do not need
DWARF unwinding support"), --call-graph dwarf is allowed in perf record
even without unwind support.  A couple of other places don't reflect
this yet though: the help text should list dwarf as a valid record mode
and the dump_size config should be respected too.

Signed-off-by: Rabin Vincent <rabinv@...s.com>
---
 tools/perf/util/callchain.c | 2 --
 tools/perf/util/callchain.h | 4 ----
 2 files changed, 6 deletions(-)

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 07fd30b..ae58b49 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -193,7 +193,6 @@ int perf_callchain_config(const char *var, const char *value)
 
 	if (!strcmp(var, "record-mode"))
 		return parse_callchain_record_opt(value, &callchain_param);
-#ifdef HAVE_DWARF_UNWIND_SUPPORT
 	if (!strcmp(var, "dump-size")) {
 		unsigned long size = 0;
 		int ret;
@@ -203,7 +202,6 @@ int perf_callchain_config(const char *var, const char *value)
 
 		return ret;
 	}
-#endif
 	if (!strcmp(var, "print-type"))
 		return parse_callchain_mode(value);
 	if (!strcmp(var, "order"))
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 13e7554..47cfd10 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -11,11 +11,7 @@
 
 #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace):\n\n"
 
-#ifdef HAVE_DWARF_UNWIND_SUPPORT
 # define RECORD_MODE_HELP  HELP_PAD "record_mode:\tcall graph recording mode (fp|dwarf|lbr)\n"
-#else
-# define RECORD_MODE_HELP  HELP_PAD "record_mode:\tcall graph recording mode (fp|lbr)\n"
-#endif
 
 #define RECORD_SIZE_HELP						\
 	HELP_PAD "record_size:\tif record_mode is 'dwarf', max size of stack recording (<bytes>)\n" \
-- 
2.1.4