linux-kernel - [PATCH 09/12] perf, tools: Downgrade register mapping message to warning

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Date:   Mon, 27 Nov 2017 16:23:18 -0800
From:   Andi Kleen <andi@...stfloor.org>
To:     acme@...nel.org
Cc:     jolsa@...nel.org, mhiramat@...nel.org, adrian.hunter@...el.com,
        linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 09/12] perf, tools: Downgrade register mapping message to warning

From: Andi Kleen <ak@...ux.intel.com>

When tracing floating point code it's quite possible that perf
doesn't recognize the register number. Downgrade the warning
for unknown registers to a debug message.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 tools/perf/util/probe-finder.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 137b2fe71838..5fe6466254f9 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -272,8 +272,8 @@ static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr,
 
 	regs = get_dwarf_regstr(regn, machine);
 	if (!regs) {
-		/* This should be a bug in DWARF or this tool */
-		pr_warning("Mapping for the register number %u "
+		/* This can happen with floating point */
+		pr_debug("Mapping for the register number %u "
 			   "missing on this architecture.\n", regn);
 		return -ENOTSUP;
 	}
-- 
2.13.6