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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-02-26 10:54:36 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-06-09 13:28:55 +0100 |
| commit | 5bd43c3b3164abc6da4618a373a701be812eb163 (patch) | |
| tree | 492a5931f30ce8ccf8a5df39988a1fc48be0ae1c /kernel/tracepoint.c | |
| parent | a3bc0f8ea439762aa62d40a295157410498cbea7 (diff) | |
| download | kernel_samsung_smdk4412-5bd43c3b3164abc6da4618a373a701be812eb163.zip kernel_samsung_smdk4412-5bd43c3b3164abc6da4618a373a701be812eb163.tar.gz kernel_samsung_smdk4412-5bd43c3b3164abc6da4618a373a701be812eb163.tar.bz2 | |
tracepoint: Do not waste memory on mods with no tracepoints
commit 7dec935a3aa04412cba2cebe1524ae0d34a30c24 upstream.
No reason to allocate tp_module structures for modules that have no
tracepoints. This just wastes memory.
Fixes: b75ef8b44b1c "Tracepoint: Dissociate from module mutex"
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'kernel/tracepoint.c')
| -rw-r--r-- | kernel/tracepoint.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index 41b25a0..088fbc5 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -638,6 +638,9 @@ static int tracepoint_module_coming(struct module *mod) struct tp_module *tp_mod, *iter; int ret = 0; + if (!mod->num_tracepoints) + return 0; + /* * We skip modules that taint the kernel, especially those with different * module headers (for forced load), to make sure we don't cause a crash. @@ -681,6 +684,9 @@ static int tracepoint_module_going(struct module *mod) { struct tp_module *pos; + if (!mod->num_tracepoints) + return 0; + mutex_lock(&tracepoints_mutex); tracepoint_update_probe_range(mod->tracepoints_ptrs, mod->tracepoints_ptrs + mod->num_tracepoints); |