tracing: Rename trace_event_mutex to trace_event_sem
trace_event_mutex is an rw semaphore now, not a mutex, change the name. Link: http://lkml.kernel.org/r/513D843B.40109@huawei.com Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com> [ Forward ported to my new code ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>wifi-calibration
parent
36a78e9e87
commit
52f6ad6dc3
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@ -1584,7 +1584,7 @@ int trace_add_event_call(struct ftrace_event_call *call)
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}
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}
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/*
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/*
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* Must be called under locking both of event_mutex and trace_event_mutex.
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* Must be called under locking both of event_mutex and trace_event_sem.
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*/
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*/
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static void __trace_remove_event_call(struct ftrace_event_call *call)
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static void __trace_remove_event_call(struct ftrace_event_call *call)
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{
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{
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@ -1597,9 +1597,9 @@ static void __trace_remove_event_call(struct ftrace_event_call *call)
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void trace_remove_event_call(struct ftrace_event_call *call)
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void trace_remove_event_call(struct ftrace_event_call *call)
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{
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{
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mutex_lock(&event_mutex);
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mutex_lock(&event_mutex);
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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__trace_remove_event_call(call);
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__trace_remove_event_call(call);
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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mutex_unlock(&event_mutex);
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mutex_unlock(&event_mutex);
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}
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}
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@ -1707,7 +1707,7 @@ static void trace_module_remove_events(struct module *mod)
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struct ftrace_event_call *call, *p;
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struct ftrace_event_call *call, *p;
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bool clear_trace = false;
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bool clear_trace = false;
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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list_for_each_entry_safe(call, p, &ftrace_events, list) {
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list_for_each_entry_safe(call, p, &ftrace_events, list) {
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if (call->mod == mod) {
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if (call->mod == mod) {
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if (call->flags & TRACE_EVENT_FL_WAS_ENABLED)
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if (call->flags & TRACE_EVENT_FL_WAS_ENABLED)
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@ -1725,7 +1725,7 @@ static void trace_module_remove_events(struct module *mod)
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list_del(&file_ops->list);
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list_del(&file_ops->list);
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kfree(file_ops);
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kfree(file_ops);
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}
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}
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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/*
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/*
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* It is safest to reset the ring buffer if the module being unloaded
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* It is safest to reset the ring buffer if the module being unloaded
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@ -2262,9 +2262,9 @@ int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr)
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if (ret)
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if (ret)
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goto out_unlock;
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goto out_unlock;
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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__trace_add_event_dirs(tr);
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__trace_add_event_dirs(tr);
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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out_unlock:
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out_unlock:
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mutex_unlock(&event_mutex);
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mutex_unlock(&event_mutex);
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@ -2287,9 +2287,9 @@ early_event_add_tracer(struct dentry *parent, struct trace_array *tr)
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if (ret)
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if (ret)
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goto out_unlock;
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goto out_unlock;
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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__trace_early_add_event_dirs(tr);
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__trace_early_add_event_dirs(tr);
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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out_unlock:
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out_unlock:
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mutex_unlock(&event_mutex);
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mutex_unlock(&event_mutex);
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@ -2304,10 +2304,10 @@ int event_trace_del_tracer(struct trace_array *tr)
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mutex_lock(&event_mutex);
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mutex_lock(&event_mutex);
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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__trace_remove_event_dirs(tr);
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__trace_remove_event_dirs(tr);
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debugfs_remove_recursive(tr->event_dir);
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debugfs_remove_recursive(tr->event_dir);
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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tr->event_dir = NULL;
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tr->event_dir = NULL;
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@ -14,7 +14,7 @@
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/* must be a power of 2 */
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/* must be a power of 2 */
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#define EVENT_HASHSIZE 128
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#define EVENT_HASHSIZE 128
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DECLARE_RWSEM(trace_event_mutex);
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DECLARE_RWSEM(trace_event_sem);
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static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
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static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
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@ -826,12 +826,12 @@ static int trace_search_list(struct list_head **list)
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void trace_event_read_lock(void)
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void trace_event_read_lock(void)
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{
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{
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down_read(&trace_event_mutex);
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down_read(&trace_event_sem);
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}
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}
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void trace_event_read_unlock(void)
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void trace_event_read_unlock(void)
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{
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{
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up_read(&trace_event_mutex);
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up_read(&trace_event_sem);
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}
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}
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/**
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/**
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@ -854,7 +854,7 @@ int register_ftrace_event(struct trace_event *event)
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unsigned key;
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unsigned key;
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int ret = 0;
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int ret = 0;
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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if (WARN_ON(!event))
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if (WARN_ON(!event))
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goto out;
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goto out;
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@ -909,14 +909,14 @@ int register_ftrace_event(struct trace_event *event)
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ret = event->type;
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ret = event->type;
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out:
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out:
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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return ret;
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return ret;
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}
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}
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EXPORT_SYMBOL_GPL(register_ftrace_event);
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EXPORT_SYMBOL_GPL(register_ftrace_event);
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/*
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/*
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* Used by module code with the trace_event_mutex held for write.
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* Used by module code with the trace_event_sem held for write.
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*/
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*/
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int __unregister_ftrace_event(struct trace_event *event)
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int __unregister_ftrace_event(struct trace_event *event)
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{
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{
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@ -931,9 +931,9 @@ int __unregister_ftrace_event(struct trace_event *event)
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*/
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*/
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int unregister_ftrace_event(struct trace_event *event)
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int unregister_ftrace_event(struct trace_event *event)
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{
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{
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down_write(&trace_event_mutex);
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down_write(&trace_event_sem);
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__unregister_ftrace_event(event);
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__unregister_ftrace_event(event);
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up_write(&trace_event_mutex);
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up_write(&trace_event_sem);
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return 0;
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return 0;
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}
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}
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@ -33,7 +33,7 @@ trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
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/* used by module unregistering */
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/* used by module unregistering */
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extern int __unregister_ftrace_event(struct trace_event *event);
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extern int __unregister_ftrace_event(struct trace_event *event);
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extern struct rw_semaphore trace_event_mutex;
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extern struct rw_semaphore trace_event_sem;
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#define MAX_MEMHEX_BYTES 8
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#define MAX_MEMHEX_BYTES 8
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#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
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#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
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