[patch 1/4] perf_counter tools: Make symbol loading consistently return number of loaded symbols

[Mike Galbraith <efault@gmx.de>]

perf_counter tools: Make symbol loading consistently return number of loaded symbols.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>

---
 tools/perf/builtin-annotate.c |    2 +-
 tools/perf/builtin-report.c   |    2 +-
 tools/perf/builtin-top.c      |    2 +-
 tools/perf/util/symbol.c      |    9 ++++++---
 4 files changed, 9 insertions(+), 6 deletions(-)

Index: linux-2.6/tools/perf/builtin-annotate.c
===================================================================
--- linux-2.6.orig/tools/perf/builtin-annotate.c
+++ linux-2.6/tools/perf/builtin-annotate.c
@@ -172,7 +172,7 @@ static int load_kernel(void)
 		return -1;
 
 	err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
-	if (err) {
+	if (err <= 0) {
 		dso__delete(kernel_dso);
 		kernel_dso = NULL;
 	} else
Index: linux-2.6/tools/perf/builtin-report.c
===================================================================
--- linux-2.6.orig/tools/perf/builtin-report.c
+++ linux-2.6/tools/perf/builtin-report.c
@@ -189,7 +189,7 @@ static int load_kernel(void)
 		return -1;
 
 	err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
-	if (err) {
+	if (err <= 0) {
 		dso__delete(kernel_dso);
 		kernel_dso = NULL;
 	} else
Index: linux-2.6/tools/perf/builtin-top.c
===================================================================
--- linux-2.6.orig/tools/perf/builtin-top.c
+++ linux-2.6/tools/perf/builtin-top.c
@@ -364,7 +364,7 @@ static int parse_symbols(void)
 	if (kernel_dso == NULL)
 		return -1;
 
-	if (dso__load_kernel(kernel_dso, NULL, symbol_filter, 1) != 0)
+	if (dso__load_kernel(kernel_dso, NULL, symbol_filter, 1) <= 0)
 		goto out_delete_dso;
 
 	node = rb_first(&kernel_dso->syms);
Index: linux-2.6/tools/perf/util/symbol.c
===================================================================
--- linux-2.6.orig/tools/perf/util/symbol.c
+++ linux-2.6/tools/perf/util/symbol.c
@@ -146,6 +146,7 @@ static int dso__load_kallsyms(struct dso
 	char *line = NULL;
 	size_t n;
 	FILE *file = fopen("/proc/kallsyms", "r");
+	int count = 0;
 
 	if (file == NULL)
 		goto out_failure;
@@ -188,8 +189,10 @@ static int dso__load_kallsyms(struct dso
 
 		if (filter && filter(self, sym))
 			symbol__delete(sym, self->sym_priv_size);
-		else
+		else {
 			dso__insert_symbol(self, sym);
+			count++;
+		}
 	}
 
 	/*
@@ -212,7 +215,7 @@ static int dso__load_kallsyms(struct dso
 	free(line);
 	fclose(file);
 
-	return 0;
+	return count;
 
 out_delete_line:
 	free(line);
@@ -639,7 +642,7 @@ int dso__load_kernel(struct dso *self, c
 	if (vmlinux)
 		err = dso__load_vmlinux(self, vmlinux, filter, verbose);
 
-	if (err < 0)
+	if (err <= 0)
 		err = dso__load_kallsyms(self, filter, verbose);
 
 	return err;