These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 83 insertions, 31 deletions

diff --git a/kernel/tools/perf/tests/code-reading.c b/kernel/tools/perf/tests/code-reading.c
index f671ec37a..a767a6400 100644
--- a/kernel/tools/perf/tests/code-reading.c
+++ b/kernel/tools/perf/tests/code-reading.c
@@ -33,20 +33,20 @@ static unsigned int hex(char c)
 	return c - 'A' + 10;
 }
 
-static void read_objdump_line(const char *line, size_t line_len, void **buf,
-			      size_t *len)
+static size_t read_objdump_line(const char *line, size_t line_len, void *buf,
+			      size_t len)
 {
 	const char *p;
-	size_t i;
+	size_t i, j = 0;
 
 	/* Skip to a colon */
 	p = strchr(line, ':');
 	if (!p)
-		return;
+		return 0;
 	i = p + 1 - line;
 
 	/* Read bytes */
-	while (*len) {
+	while (j < len) {
 		char c1, c2;
 
 		/* Skip spaces */
@@ -65,20 +65,26 @@ static void read_objdump_line(const char *line, size_t line_len, void **buf,
 		if (i < line_len && line[i] && !isspace(line[i]))
 			break;
 		/* Store byte */
-		*(unsigned char *)*buf = (hex(c1) << 4) | hex(c2);
-		*buf += 1;
-		*len -= 1;
+		*(unsigned char *)buf = (hex(c1) << 4) | hex(c2);
+		buf += 1;
+		j++;
 	}
+	/* return number of successfully read bytes */
+	return j;
 }
 
-static int read_objdump_output(FILE *f, void **buf, size_t *len)
+static int read_objdump_output(FILE *f, void *buf, size_t *len, u64 start_addr)
 {
 	char *line = NULL;
-	size_t line_len;
+	size_t line_len, off_last = 0;
 	ssize_t ret;
 	int err = 0;
+	u64 addr, last_addr = start_addr;
+
+	while (off_last < *len) {
+		size_t off, read_bytes, written_bytes;
+		unsigned char tmp[BUFSZ];
 
-	while (1) {
 		ret = getline(&line, &line_len, f);
 		if (feof(f))
 			break;
@@ -87,9 +93,33 @@ static int read_objdump_output(FILE *f, void **buf, size_t *len)
 			err = -1;
 			break;
 		}
-		read_objdump_line(line, ret, buf, len);
+
+		/* read objdump data into temporary buffer */
+		read_bytes = read_objdump_line(line, ret, tmp, sizeof(tmp));
+		if (!read_bytes)
+			continue;
+
+		if (sscanf(line, "%"PRIx64, &addr) != 1)
+			continue;
+		if (addr < last_addr) {
+			pr_debug("addr going backwards, read beyond section?\n");
+			break;
+		}
+		last_addr = addr;
+
+		/* copy it from temporary buffer to 'buf' according
+		 * to address on current objdump line */
+		off = addr - start_addr;
+		if (off >= *len)
+			break;
+		written_bytes = MIN(read_bytes, *len - off);
+		memcpy(buf + off, tmp, written_bytes);
+		off_last = off + written_bytes;
 	}
 
+	/* len returns number of bytes that could not be read */
+	*len -= off_last;
+
 	free(line);
 
 	return err;
@@ -103,7 +133,7 @@ static int read_via_objdump(const char *filename, u64 addr, void *buf,
 	FILE *f;
 	int ret;
 
-	fmt = "%s -d --start-address=0x%"PRIx64" --stop-address=0x%"PRIx64" %s";
+	fmt = "%s -z -d --start-address=0x%"PRIx64" --stop-address=0x%"PRIx64" %s";
 	ret = snprintf(cmd, sizeof(cmd), fmt, "objdump", addr, addr + len,
 		       filename);
 	if (ret <= 0 || (size_t)ret >= sizeof(cmd))
@@ -120,7 +150,7 @@ static int read_via_objdump(const char *filename, u64 addr, void *buf,
 		return -1;
 	}
 
-	ret = read_objdump_output(f, &buf, &len);
+	ret = read_objdump_output(f, buf, &len, addr);
 	if (len) {
 		pr_debug("objdump read too few bytes\n");
 		if (!ret)
@@ -132,6 +162,18 @@ static int read_via_objdump(const char *filename, u64 addr, void *buf,
 	return ret;
 }
 
+static void dump_buf(unsigned char *buf, size_t len)
+{
+	size_t i;
+
+	for (i = 0; i < len; i++) {
+		pr_debug("0x%02x ", buf[i]);
+		if (i % 16 == 15)
+			pr_debug("\n");
+	}
+	pr_debug("\n");
+}
+
 static int read_object_code(u64 addr, size_t len, u8 cpumode,
 			    struct thread *thread, struct state *state)
 {
@@ -234,6 +276,10 @@ static int read_object_code(u64 addr, size_t len, u8 cpumode,
 	/* The results should be identical */
 	if (memcmp(buf1, buf2, len)) {
 		pr_debug("Bytes read differ from those read by objdump\n");
+		pr_debug("buf1 (dso):\n");
+		dump_buf(buf1, len);
+		pr_debug("buf2 (objdump):\n");
+		dump_buf(buf2, len);
 		return -1;
 	}
 	pr_debug("Bytes read match those read by objdump\n");
@@ -248,6 +294,7 @@ static int process_sample_event(struct machine *machine,
 	struct perf_sample sample;
 	struct thread *thread;
 	u8 cpumode;
+	int ret;
 
 	if (perf_evlist__parse_sample(evlist, event, &sample)) {
 		pr_debug("perf_evlist__parse_sample failed\n");
@@ -262,7 +309,9 @@ static int process_sample_event(struct machine *machine,
 
 	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
-	return read_object_code(sample.ip, READLEN, cpumode, thread, state);
+	ret = read_object_code(sample.ip, READLEN, cpumode, thread, state);
+	thread__put(thread);
+	return ret;
 }
 
 static int process_event(struct machine *machine, struct perf_evlist *evlist,
@@ -424,7 +473,7 @@ static int do_test_code_reading(bool try_kcore)
 		symbol_conf.kallsyms_name = "/proc/kallsyms";
 
 	/* Load kernel map */
-	map = machine->vmlinux_maps[MAP__FUNCTION];
+	map = machine__kernel_map(machine);
 	ret = map__load(map, NULL);
 	if (ret < 0) {
 		pr_debug("map__load failed\n");
@@ -448,7 +497,7 @@ static int do_test_code_reading(bool try_kcore)
 	}
 
 	ret = perf_event__synthesize_thread_map(NULL, threads,
-						perf_event__process, machine, false);
+						perf_event__process, machine, false, 500);
 	if (ret < 0) {
 		pr_debug("perf_event__synthesize_thread_map failed\n");
 		goto out_err;
@@ -457,13 +506,13 @@ static int do_test_code_reading(bool try_kcore)
 	thread = machine__findnew_thread(machine, pid, pid);
 	if (!thread) {
 		pr_debug("machine__findnew_thread failed\n");
-		goto out_err;
+		goto out_put;
 	}
 
 	cpus = cpu_map__new(NULL);
 	if (!cpus) {
 		pr_debug("cpu_map__new failed\n");
-		goto out_err;
+		goto out_put;
 	}
 
 	while (1) {
@@ -472,7 +521,7 @@ static int do_test_code_reading(bool try_kcore)
 		evlist = perf_evlist__new();
 		if (!evlist) {
 			pr_debug("perf_evlist__new failed\n");
-			goto out_err;
+			goto out_put;
 		}
 
 		perf_evlist__set_maps(evlist, cpus, threads);
@@ -482,10 +531,10 @@ static int do_test_code_reading(bool try_kcore)
 		else
 			str = "cycles";
 		pr_debug("Parsing event '%s'\n", str);
-		ret = parse_events(evlist, str);
+		ret = parse_events(evlist, str, NULL);
 		if (ret < 0) {
 			pr_debug("parse_events failed\n");
-			goto out_err;
+			goto out_put;
 		}
 
 		perf_evlist__config(evlist, &opts);
@@ -506,7 +555,7 @@ static int do_test_code_reading(bool try_kcore)
 				continue;
 			}
 			pr_debug("perf_evlist__open failed\n");
-			goto out_err;
+			goto out_put;
 		}
 		break;
 	}
@@ -514,7 +563,7 @@ static int do_test_code_reading(bool try_kcore)
 	ret = perf_evlist__mmap(evlist, UINT_MAX, false);
 	if (ret < 0) {
 		pr_debug("perf_evlist__mmap failed\n");
-		goto out_err;
+		goto out_put;
 	}
 
 	perf_evlist__enable(evlist);
@@ -525,7 +574,7 @@ static int do_test_code_reading(bool try_kcore)
 
 	ret = process_events(machine, evlist, &state);
 	if (ret < 0)
-		goto out_err;
+		goto out_put;
 
 	if (!have_vmlinux && !have_kcore && !try_kcore)
 		err = TEST_CODE_READING_NO_KERNEL_OBJ;
@@ -535,12 +584,15 @@ static int do_test_code_reading(bool try_kcore)
 		err = TEST_CODE_READING_NO_ACCESS;
 	else
 		err = TEST_CODE_READING_OK;
+out_put:
+	thread__put(thread);
 out_err:
+
 	if (evlist) {
 		perf_evlist__delete(evlist);
 	} else {
-		cpu_map__delete(cpus);
-		thread_map__delete(threads);
+		cpu_map__put(cpus);
+		thread_map__put(threads);
 	}
 	machines__destroy_kernel_maps(&machines);
 	machine__delete_threads(machine);
@@ -561,16 +613,16 @@ int test__code_reading(void)
 	case TEST_CODE_READING_OK:
 		return 0;
 	case TEST_CODE_READING_NO_VMLINUX:
-		fprintf(stderr, " (no vmlinux)");
+		pr_debug("no vmlinux\n");
 		return 0;
 	case TEST_CODE_READING_NO_KCORE:
-		fprintf(stderr, " (no kcore)");
+		pr_debug("no kcore\n");
 		return 0;
 	case TEST_CODE_READING_NO_ACCESS:
-		fprintf(stderr, " (no access)");
+		pr_debug("no access\n");
 		return 0;
 	case TEST_CODE_READING_NO_KERNEL_OBJ:
-		fprintf(stderr, " (no kernel obj)");
+		pr_debug("no kernel obj\n");
 		return 0;
 	default:
 		return -1;