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jump_label: Fix jump_label update for modules 

The jump labels entries for modules do not stop at __stop__jump_table,
but after mod->jump_entries + mod_num_jump_entries.

By checking the wrong end point, module trace events never get enabled.

Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Jason Baron <jbaron@redhat.com>
Tested-by: Avi Kivity <avi@redhat.com>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/4E00038B.2060404@cn.fujitsu.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Xiao Guangrong 2011-06-21 10:35:55 +08:00 committed by Steven Rostedt
parent debf1d4948
commit 140fe3b1ab
1 changed files with 9 additions and 5 deletions
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14
kernel/jump_label.c
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@ -375,15 +375,19 @@ int jump_label_text_reserved(void *start, void *end)
static void jump_label_update(struct jump_label_key *key, int enable)
{
struct jump_entry *entry = key->entries;
/* if there are no users, entry can be NULL */
if (entry)
__jump_label_update(key, entry, __stop___jump_table, enable);
struct jump_entry *entry = key->entries, *stop = __stop___jump_table;
#ifdef CONFIG_MODULES
struct module *mod = __module_address((jump_label_t)key);
__jump_label_mod_update(key, enable);
if (mod)
stop = mod->jump_entries + mod->num_jump_entries;
#endif
/* if there are no users, entry can be NULL */
if (entry)
__jump_label_update(key, entry, stop, enable);
}
#endif