Patch "perf tools: Decompress kernel module when reading DSO data" has been added to the 4.9-stable tree

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

perf tools: Decompress kernel module when reading DSO data

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-tools-decompress-kernel-module-when-reading-dso-data.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 <[email protected]> know about it.

From: Namhyung Kim <[email protected]>
Date: Thu, 8 Jun 2017 16:31:05 +0900
Subject: perf tools: Decompress kernel module when reading DSO data

From: Namhyung Kim <[email protected]>

[ Upstream commit 1d6b3c9ba756a5134fd7ad1959acac776d17404b ]

Currently perf decompresses kernel modules when loading the symbol table but it missed to do it when reading raw data.

---
 tools/perf/util/dso.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

@@ -366,7 +366,23 @@ static int __open_dso(struct dso *dso, s
 	if (!is_regular_file(name))
 		return -EINVAL;
 
+	if (dso__needs_decompress(dso)) {
+		char newpath[KMOD_DECOMP_LEN];
+		size_t len = sizeof(newpath);
+
+		if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
+			free(name);
+			return -dso->load_errno;
+		}
+
+		strcpy(name, newpath);
+	}
+
 	fd = do_open(name);
+
+	if (dso__needs_decompress(dso))
+		unlink(name);
+
 	free(name);
 	return fd;
 }

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

queue-4.9/perf-report-fix-off-by-one-for-non-activation-frames.patch queue-4.9/perf-trace-add-mmap-alias-for-s390.patch queue-4.9/perf-report-ensure-the-perf-dso-mapping-matches-what-libdw-sees.patch queue-4.9/perf-tools-fix-copyfile_offset-update-of-output-offset.patch queue-4.9/perf-tools-decompress-kernel-module-when-reading-dso-data.patch queue-4.9/perf-tests-decompress-kernel-module-before-objdump.patch queue-4.9/perf-header-set-proper-module-name-when-build-id-event-found.patch