[PATCH 3.18 25/25] Revert "perf tests: Decompress kernel module before objdump"

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

This reverts commit 091b3b4ba55daf8b28f40794aefdaa0bdb5af7a1 which is
commit 94df1040b1e6aacd8dec0ba3c61d7e77cd695f26 upstream.

It breaks the build of perf on 3.18.y, so I'm dropping it.

Reported-by: Pavlos Parissis <pavlos.parissis@xxxxxxxxx>
Reported-by: Lei Chen <chenl.lei@xxxxxxxxx>
Reported-by: Maxime Hadjinlian <maxime.hadjinlian@xxxxxxxxx>
Reported-by: Murilo Opsfelder Araujo <muriloo@xxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: kernel-team@xxxxxxx
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 tools/perf/tests/code-reading.c |   20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -141,8 +141,6 @@ static int read_object_code(u64 addr, si
 	unsigned char buf2[BUFSZ];
 	size_t ret_len;
 	u64 objdump_addr;
-	const char *objdump_name;
-	char decomp_name[KMOD_DECOMP_LEN];
 	int ret;
 
 	pr_debug("Reading object code for memory address: %#"PRIx64"\n", addr);
@@ -204,25 +202,9 @@ static int read_object_code(u64 addr, si
 		state->done[state->done_cnt++] = al.map->start;
 	}
 
-	objdump_name = al.map->dso->long_name;
-	if (dso__needs_decompress(al.map->dso)) {
-		if (dso__decompress_kmodule_path(al.map->dso, objdump_name,
-						 decomp_name,
-						 sizeof(decomp_name)) < 0) {
-			pr_debug("decompression failed\n");
-			return -1;
-		}
-
-		objdump_name = decomp_name;
-	}
-
 	/* Read the object code using objdump */
 	objdump_addr = map__rip_2objdump(al.map, al.addr);
-	ret = read_via_objdump(objdump_name, objdump_addr, buf2, len);
-
-	if (dso__needs_decompress(al.map->dso))
-		unlink(objdump_name);
-
+	ret = read_via_objdump(al.map->dso->long_name, objdump_addr, buf2, len);
 	if (ret > 0) {
 		/*
 		 * The kernel maps are inaccurate - assume objdump is right in