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| author | jolsa@redhat.com <jolsa@redhat.com> | 2009-10-07 19:00:35 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-10-07 15:52:09 -0400 |
| commit | e7247a15ff3bbdab0a8b402dffa1171e5c05a8e0 (patch) | |
| tree | 139c26b2abd8ea5dd55ee6a4d43622bb24a0ee6a | |
| parent | 829b876dfc94ea8be3a47e200d06f1f217bb104f (diff) | |
| download | op-kernel-dev-e7247a15ff3bbdab0a8b402dffa1171e5c05a8e0.zip op-kernel-dev-e7247a15ff3bbdab0a8b402dffa1171e5c05a8e0.tar.gz | |
tracing: correct module boundaries for ftrace_release
When the module is about the unload we release its call records.
The ftrace_release function was given wrong values representing
the module core boundaries, thus not releasing its call records.
Plus making ftrace_release function module specific.
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <1254934835-363-3-git-send-email-jolsa@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | include/linux/ftrace.h | 2 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 12 |
2 files changed, 5 insertions, 9 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index cd3d2ab..0b4f97d 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -241,7 +241,7 @@ extern void ftrace_enable_daemon(void); # define ftrace_set_filter(buf, len, reset) do { } while (0) # define ftrace_disable_daemon() do { } while (0) # define ftrace_enable_daemon() do { } while (0) -static inline void ftrace_release(void *start, unsigned long size) { } +static inline void ftrace_release_mod(struct module *mod) {} static inline int register_ftrace_command(struct ftrace_func_command *cmd) { return -EINVAL; diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 46592fe..c701476 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2658,19 +2658,17 @@ static int ftrace_convert_nops(struct module *mod, } #ifdef CONFIG_MODULES -void ftrace_release(void *start, void *end) +void ftrace_release_mod(struct module *mod) { struct dyn_ftrace *rec; struct ftrace_page *pg; - unsigned long s = (unsigned long)start; - unsigned long e = (unsigned long)end; - if (ftrace_disabled || !start || start == end) + if (ftrace_disabled) return; mutex_lock(&ftrace_lock); do_for_each_ftrace_rec(pg, rec) { - if ((rec->ip >= s) && (rec->ip < e)) { + if (within_module_core(rec->ip, mod)) { /* * rec->ip is changed in ftrace_free_rec() * It should not between s and e if record was freed. @@ -2702,9 +2700,7 @@ static int ftrace_module_notify(struct notifier_block *self, mod->num_ftrace_callsites); break; case MODULE_STATE_GOING: - ftrace_release(mod->ftrace_callsites, - mod->ftrace_callsites + - mod->num_ftrace_callsites); + ftrace_release_mod(mod); break; } |
