linux-kernel - [PATCH v2 13/19] locking/lockdep: Remove unnecessary function pointer argument

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Date:   Mon, 18 Mar 2019 16:57:27 +0800
From:   Yuyang Du <duyuyang@...il.com>
To:     peterz@...radead.org, will.deacon@....com, mingo@...nel.org
Cc:     bvanassche@....org, ming.lei@...hat.com,
        linux-kernel@...r.kernel.org, Yuyang Du <duyuyang@...il.com>
Subject: [PATCH v2 13/19] locking/lockdep: Remove unnecessary function pointer argument

check_prev_add() always has save_trace() as an input argument, which is
unnecessary.

Signed-off-by: Yuyang Du <duyuyang@...il.com>
---
 kernel/locking/lockdep.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 250ba64..de731b8 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2190,8 +2190,7 @@ static void print_deadlock_scenario(struct held_lock *nxt,
  */
 static int
 check_prev_add(struct task_struct *curr, struct held_lock *prev,
-	       struct held_lock *next, int distance, struct stack_trace *trace,
-	       int (*save)(struct stack_trace *trace))
+	       struct held_lock *next, int distance, struct stack_trace *trace)
 {
 	struct lock_list *uninitialized_var(target_entry);
 	struct lock_list *entry;
@@ -2231,11 +2230,11 @@ static void print_deadlock_scenario(struct held_lock *nxt,
 	if (unlikely(!ret)) {
 		if (!trace->entries) {
 			/*
-			 * If @save fails here, the printing might trigger
+			 * If save_trace fails here, the printing might trigger
 			 * a WARN but because of the !nr_entries it should
 			 * not do bad things.
 			 */
-			save(trace);
+			save_trace(trace);
 		}
 		print_circular_bug(&this, target_entry, next, prev, trace);
 		return 0;
@@ -2290,7 +2289,7 @@ static void print_deadlock_scenario(struct held_lock *nxt,
 	}
 
 
-	if (!trace->entries && !save(trace))
+	if (!trace->entries && !save_trace(trace))
 		return 0;
 
 	/*
@@ -2355,7 +2354,7 @@ static void print_deadlock_scenario(struct held_lock *nxt,
 		 * added:
 		 */
 		if (hlock->read != 2 && hlock->check) {
-			int ret = check_prev_add(curr, hlock, next, distance, &trace, save_trace);
+			int ret = check_prev_add(curr, hlock, next, distance, &trace);
 			if (!ret)
 				return 0;
 
-- 
1.8.3.1