perf symbols: Do lazy symtab loading for the kernel & modules too

Just like we do with the other DSOs. This also simplifies the
kernel_maps setup process, now all that the tools need to do is
to call kernel_maps__init and the maps for the modules and
kernel will be created, then, later, when
kernel_maps__find_symbol() is used, it will also call
maps__find_symbol that already checks if the symtab was loaded,
loading it if needed.

Now if one does 'perf top --hide_kernel_symbols' we won't pay
the price of loading the (many) symbols in /proc/kallsyms or
vmlinux.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1258757489-5978-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0af48401f089..0d39e805be2d 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -449,7 +449,7 @@ got_map:
                  * trick of looking in the whole kernel symbol list.
                  */
                 if ((long long)ip < 0)
-                        return kernel_maps__find_symbol(ip, mapp);
+                        return kernel_maps__find_symbol(ip, mapp, NULL);
         }
         dump_printf(" ...... dso: %s\n",
                     map ? map->dso->long_name : "<not found>");
@@ -496,7 +496,7 @@ static struct symbol **resolve_callchain(struct thread *thread, struct map *map,
                 case PERF_CONTEXT_HV:
                         break;
                 case PERF_CONTEXT_KERNEL:
-                        sym = kernel_maps__find_symbol(ip, &map);
+                        sym = kernel_maps__find_symbol(ip, &map, NULL);
                         break;
                 default:
                         sym = resolve_symbol(thread, &map, &ip);
@@ -716,7 +716,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 
         if (cpumode == PERF_RECORD_MISC_KERNEL) {
                 level = 'k';
-                sym = kernel_maps__find_symbol(ip, &map);
+                sym = kernel_maps__find_symbol(ip, &map, NULL);
                 dump_printf(" ...... dso: %s\n",
                             map ? map->dso->long_name : "<not found>");
         } else if (cpumode == PERF_RECORD_MISC_USER) {