Patch "perf callchain: Fixup help/config for no-unwinding" has been added to the 4.9-stable tree

Patch "perf callchain: Fixup help/config for no-unwinding" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    perf callchain: Fixup help/config for no-unwinding

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-callchain-fixup-help-config-for-no-unwinding.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c56cb33b56c13493eeb95612f80e4dd6e35cd109 Mon Sep 17 00:00:00 2001
From: Rabin Vincent <rabinv@axis.com>
Date: Wed, 10 Aug 2016 15:52:28 +0200
Subject: perf callchain: Fixup help/config for no-unwinding

From: Rabin Vincent <rabinv@axis.com>

commit c56cb33b56c13493eeb95612f80e4dd6e35cd109 upstream.

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@axis.com>
Cc: He Kuang <hekuang@huawei.com>
Fixes: 841e3558b2de ("perf callchain: Recording 'dwarf' callchains do not need DWARF unwinding support")
Link: http://lkml.kernel.org/r/1470837148-7642-1-git-send-email-rabin.vincent@axis.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/perf/util/callchain.c |    2 --
 tools/perf/util/callchain.h |    4 ----
 2 files changed, 6 deletions(-)

--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -193,7 +193,6 @@ int perf_callchain_config(const char *va
 
 	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 *va
 
 		return ret;
 	}
-#endif
 	if (!strcmp(var, "print-type"))
 		return parse_callchain_mode(value);
 	if (!strcmp(var, "order"))
--- 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" \


Patches currently in stable-queue which might be from rabinv@axis.com are

queue-4.9/perf-callchain-fixup-help-config-for-no-unwinding.patch