Patch "perf intel-pt: Use FUP always when scanning for an IP" has been added to the 4.4-stable tree

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

perf intel-pt: Use FUP always when scanning for an IP

to the 4.4-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-intel-pt-use-fup-always-when-scanning-for-an-ip.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Adrian Hunter <[email protected]>
Date: Fri, 26 May 2017 11:17:08 +0300
Subject: perf intel-pt: Use FUP always when scanning for an IP

From: Adrian Hunter <[email protected]>

commit 622b7a47b843c78626f40c1d1aeef8483383fba2 upstream.

The decoder will try to use branch packets to find an IP to start decoding or to recover from errors. Currently the FUP packet is used only in the case of an overflow, however there is no reason for that to be a special case. So just use FUP always when scanning for an IP.

---
 tools/perf/util/intel-pt-decoder/intel-pt-decoder.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

@@ -1848,14 +1848,10 @@ static int intel_pt_walk_to_ip(struct in
 			break;
 
 		case INTEL_PT_FUP:
-			if (decoder->overflow) {
-				if (intel_pt_have_ip(decoder))
-					intel_pt_set_ip(decoder);
-				if (decoder->ip)
-					return 0;
-			}
-			if (decoder->packet.count && decoder->have_last_ip)
-				intel_pt_set_last_ip(decoder);
+			if (intel_pt_have_ip(decoder))
+				intel_pt_set_ip(decoder);
+			if (decoder->ip)
+				return 0;
 			break;
 
 		case INTEL_PT_MTC:

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/perf-intel-pt-ensure-never-to-set-last_ip-when-packet-count-is-zero.patch queue-4.4/perf-intel-pt-use-fup-always-when-scanning-for-an-ip.patch queue-4.4/perf-intel-pt-fix-last_ip-usage.patch queue-4.4/perf-intel-pt-fix-ip-compression.patch