Merge commit 'v2.6.31-rc9' into tracing/core

[safe/jmp/linux-2.6] / kernel / module.c

diff --git a/kernel/module.c b/kernel/module.c
index eccb561..46580ed 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -55,6 +55,11 @@
 #include <linux/percpu.h>
 #include <linux/kmemleak.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/module.h>
+
+EXPORT_TRACEPOINT_SYMBOL(module_get);
+
 #if 0
 #define DEBUGP printk
 #else
@@ -942,6 +947,8 @@ void module_put(struct module *module)
        if (module) {
                unsigned int cpu = get_cpu();
                local_dec(__module_ref_addr(module, cpu));
+               trace_module_put(module, _RET_IP_,
+                                local_read(__module_ref_addr(module, cpu)));
                /* Maybe they're waiting for us to drop reference? */
                if (unlikely(!module_is_live(module)))
                        wake_up_process(module->waiter);
@@ -1274,6 +1281,10 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
        struct module_notes_attrs *notes_attrs;
        struct bin_attribute *nattr;
 
+       /* failed to create section attributes, so can't create notes */
+       if (!mod->sect_attrs)
+               return;
+
        /* Count notes sections and allocate structures.  */
        notes = 0;
        for (i = 0; i < nsect; i++)
@@ -1493,6 +1504,8 @@ static int __unlink_module(void *_mod)
 /* Free a module, remove from lists, etc (must hold module_mutex). */
 static void free_module(struct module *mod)
 {
+       trace_module_free(mod);
+
        /* Delete from various lists */
        stop_machine(__unlink_module, mod, NULL);
        remove_notes_attrs(mod);
@@ -2355,12 +2368,13 @@ static noinline struct module *load_module(void __user *umod,
        if (err < 0)
                goto unlink;
        add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
-       if (mod->sect_attrs)
-               add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+       add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
 
        /* Get rid of temporary copy */
        vfree(hdr);
 
+       trace_module_load(mod);
+
        /* Done! */
        return mod;