From 60fb7742928dab3c6a0fec7f2d2cce26d9366a3c Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Thu, 28 May 2015 02:25:05 +0000 Subject: [PATCH] perf probe: Fix 'function unused' warning By 'make build-test' a warning is found in probe-event.c that, after commit 419e873828 (perf probe: Show the error reason comes from invalid DSO) the only user of kernel_get_module_dso() is open_debuginfo(). Which is not compiled if HAVE_DWARF_SUPPORT not set. 'make build-test' found this problem when make_minimal. This patch moves kernel_get_module_dso() to HAVE_DWARF_SUPPORT ifdef section. Signed-off-by: Wang Nan Acked-by: Masami Hiramatsu Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1432779905-206143-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/probe-event.c | 65 ++++++++++++++++++----------------- 1 file changed, 33 insertions(+), 32 deletions(-) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index b0b8a8080009..e6a02b1ffd6d 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -200,38 +200,6 @@ static void put_target_map(struct map *map, bool user) } -static int kernel_get_module_dso(const char *module, struct dso **pdso) -{ - struct dso *dso; - struct map *map; - const char *vmlinux_name; - int ret = 0; - - if (module) { - list_for_each_entry(dso, &host_machine->kernel_dsos.head, - node) { - if (strncmp(dso->short_name + 1, module, - dso->short_name_len - 2) == 0) - goto found; - } - pr_debug("Failed to find module %s.\n", module); - return -ENOENT; - } - - map = host_machine->vmlinux_maps[MAP__FUNCTION]; - dso = map->dso; - - vmlinux_name = symbol_conf.vmlinux_name; - dso->load_errno = 0; - if (vmlinux_name) - ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL); - else - ret = dso__load_vmlinux_path(dso, map, NULL); -found: - *pdso = dso; - return ret; -} - static int convert_exec_to_group(const char *exec, char **result) { char *ptr1, *ptr2, *exec_copy; @@ -279,6 +247,39 @@ static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) } #ifdef HAVE_DWARF_SUPPORT + +static int kernel_get_module_dso(const char *module, struct dso **pdso) +{ + struct dso *dso; + struct map *map; + const char *vmlinux_name; + int ret = 0; + + if (module) { + list_for_each_entry(dso, &host_machine->kernel_dsos.head, + node) { + if (strncmp(dso->short_name + 1, module, + dso->short_name_len - 2) == 0) + goto found; + } + pr_debug("Failed to find module %s.\n", module); + return -ENOENT; + } + + map = host_machine->vmlinux_maps[MAP__FUNCTION]; + dso = map->dso; + + vmlinux_name = symbol_conf.vmlinux_name; + dso->load_errno = 0; + if (vmlinux_name) + ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL); + else + ret = dso__load_vmlinux_path(dso, map, NULL); +found: + *pdso = dso; + return ret; +} + /* * Some binaries like glibc have special symbols which are on the symbol * table, but not in the debuginfo. If we can find the address of the