From: Ingo Molnar <mingo@elte.hu>
Date: Sun, 22 Feb 2009 17:12:01 +0000 (+0100)
Subject: Merge branch 'tip/x86/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted... 
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c478f8786973d6d7552c652ddad3f6fd86b5af28;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Merge branch 'tip/x86/ftrace' of git://git./linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace

Conflicts:
	include/linux/ftrace.h
	kernel/trace/ftrace.c
---

c478f8786973d6d7552c652ddad3f6fd86b5af28
diff --cc include/linux/ftrace.h
index 915f4723fc8b,fdb2a89ae543..847bb3c48dd0
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@@ -106,30 -99,9 +106,33 @@@ struct ftrace_func_command 
  /* asm/ftrace.h must be defined for archs supporting dynamic ftrace */
  #include <asm/ftrace.h>
  
+ int ftrace_arch_code_modify_prepare(void);
+ int ftrace_arch_code_modify_post_process(void);
+ 
 +struct seq_file;
 +
 +struct ftrace_probe_ops {
 +	void			(*func)(unsigned long ip,
 +					unsigned long parent_ip,
 +					void **data);
 +	int			(*callback)(unsigned long ip, void **data);
 +	void			(*free)(void **data);
 +	int			(*print)(struct seq_file *m,
 +					 unsigned long ip,
 +					 struct ftrace_probe_ops *ops,
 +					 void *data);
 +};
 +
 +extern int
 +register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 +			      void *data);
 +extern void
 +unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 +				void *data);
 +extern void
 +unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops);
 +extern void unregister_ftrace_function_probe_all(char *glob);
 +
  enum {
  	FTRACE_FL_FREE		= (1 << 0),
  	FTRACE_FL_FAILED	= (1 << 1),
diff --cc kernel/trace/ftrace.c
index cf59f4c54745,11ad796ca049..5a3a06b21eee
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@@ -530,37 -531,44 +530,40 @@@ __ftrace_replace_code(struct dyn_ftrac
  
  static void ftrace_replace_code(int enable)
  {
 -	int i, failed;
  	struct dyn_ftrace *rec;
  	struct ftrace_page *pg;
 +	int failed;
  
 -	for (pg = ftrace_pages_start; pg; pg = pg->next) {
 -		for (i = 0; i < pg->index; i++) {
 -			rec = &pg->records[i];
 -
 -			/*
 -			 * Skip over free records and records that have
 -			 * failed.
 -			 */
 -			if (rec->flags & FTRACE_FL_FREE ||
 -			    rec->flags & FTRACE_FL_FAILED)
 -				continue;
 +	do_for_each_ftrace_rec(pg, rec) {
 +		/*
 +		 * Skip over free records and records that have
 +		 * failed.
 +		 */
 +		if (rec->flags & FTRACE_FL_FREE ||
 +		    rec->flags & FTRACE_FL_FAILED)
 +			continue;
  
 -			/* ignore updates to this record's mcount site */
 -			if (get_kprobe((void *)rec->ip)) {
 -				freeze_record(rec);
 -				continue;
 -			} else {
 -				unfreeze_record(rec);
 -			}
 +		/* ignore updates to this record's mcount site */
 +		if (get_kprobe((void *)rec->ip)) {
 +			freeze_record(rec);
 +			continue;
 +		} else {
 +			unfreeze_record(rec);
 +		}
  
 -			failed = __ftrace_replace_code(rec, enable);
 -			if (failed && (rec->flags & FTRACE_FL_CONVERTED)) {
 -				rec->flags |= FTRACE_FL_FAILED;
 -				if ((system_state == SYSTEM_BOOTING) ||
 -				    !core_kernel_text(rec->ip)) {
 -					ftrace_free_rec(rec);
 +		failed = __ftrace_replace_code(rec, enable);
 +		if (failed && (rec->flags & FTRACE_FL_CONVERTED)) {
 +			rec->flags |= FTRACE_FL_FAILED;
 +			if ((system_state == SYSTEM_BOOTING) ||
 +			    !core_kernel_text(rec->ip)) {
 +				ftrace_free_rec(rec);
- 			} else
+ 				} else {
 -					ftrace_bug(failed, rec->ip);
 +				ftrace_bug(failed, rec->ip);
+ 					/* Stop processing */
+ 					return;
+ 				}
 -			}
  		}
 -	}
 +	} while_for_each_ftrace_rec();
  }
  
  static int