[Adeos-main] [PATCH 1/4] tracer: cleanup critical paths

[Jan Kiszka <jan.kiszka@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 262 bytes --]

for_each_online_cpu is not free of function calls on SMP, thus causes
false NMI noise in the tracer log (due to tracer recursions). Switch to
some plain loop instead.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

[-- Attachment #2: cleanup-critical-tracer-paths.patch --]
[-- Type: text/x-patch, Size: 861 bytes --]

---
 kernel/ipipe/tracer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.22.9/kernel/ipipe/tracer.c
===================================================================
--- linux-2.6.22.9.orig/kernel/ipipe/tracer.c
+++ linux-2.6.22.9/kernel/ipipe/tracer.c
@@ -252,7 +252,7 @@ __ipipe_trace_freeze(int cpu_id, struct 
 	active = __ipipe_get_free_trace_path(active, cpu_id);
 
 	/* check if this is the first frozen path */
-	for_each_online_cpu(i) {
+	for (i = 0; i < NR_CPUS; i++) {
 		if ((i != cpu_id) &&
 		    (trace_paths[i][frozen_path[i]].end >= 0))
 			tp->end = -1;
@@ -515,7 +515,7 @@ int ipipe_trace_max_reset(void)
 
 	flags = __ipipe_global_path_lock();
 
-	for_each_online_cpu(cpu_id) {
+	for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++) {
 		path = &trace_paths[cpu_id][max_path[cpu_id]];
 
 		if (path->dump_lock) {