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ftrace: Allow module init functions to be traced

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Allow for module init sections to be traced as well as core kernel init
sections. Now that filtering modules functions can be stored, for when they
are loaded, it makes sense to be able to trace them.

Cc: Jessica Yu <jeyu@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware)
2017-03-03 18:00:22 -05:00
parent 6cafbe1594
commit 3e234289f8
3 changed files with 7 additions and 5 deletions
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6
kernel/trace/ftrace.c
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@@ -5752,7 +5752,8 @@ void ftrace_release_mod(struct module *mod)
last_pg = &ftrace_pages_start;
for (pg = ftrace_pages_start; pg; pg = *last_pg) {
rec = &pg->records[0];
if (within_module_core(rec->ip, mod)) {
if (within_module_core(rec->ip, mod) ||
within_module_init(rec->ip, mod)) {
/*
* As core pages are first, the first
* page should never be a module page.
@@ -5821,7 +5822,8 @@ void ftrace_module_enable(struct module *mod)
* not part of this module, then skip this pg,
* which the "break" will do.
*/
if (!within_module_core(rec->ip, mod))
if (!within_module_core(rec->ip, mod) &&
!within_module_init(rec->ip, mod))
break;
cnt = 0;