lib/test_min_heap: update min_heap_callbacks to use default builtin swap

Replace the swp function pointer in the min_heap_callbacks of
test_min_heap with NULL, allowing direct usage of the default builtin swap
implementation.  This modification simplifies the code and improves
performance by removing unnecessary function indirection.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kuan-Wei Chiu <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Ching-Chun (Jim) Huang <[email protected]>
Cc: Coly Li <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: "Liang, Kan" <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Matthew Sakai <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: visitorckw

lib/test_min_heap.c

@@ -23,14 +23,6 @@ static __init bool greater_than(const void *lhs, const void *rhs, void __always_
 	return *(int *)lhs > *(int *)rhs;
 }
 
-static __init void swap_ints(void *lhs, void *rhs, void __always_unused *args)
-{
-	int temp = *(int *)lhs;
-
-	*(int *)lhs = *(int *)rhs;
-	*(int *)rhs = temp;
-}
-
 static __init int pop_verify_heap(bool min_heap,
 				struct min_heap_test *heap,
 				const struct min_heap_callbacks *funcs)
@@ -72,7 +64,7 @@ static __init int test_heapify_all(bool min_heap)
 	};
 	struct min_heap_callbacks funcs = {
 		.less = min_heap ? less_than : greater_than,
-		.swp = swap_ints,
+		.swp = NULL,
 	};
 	int i, err;
 
@@ -104,7 +96,7 @@ static __init int test_heap_push(bool min_heap)
 	};
 	struct min_heap_callbacks funcs = {
 		.less = min_heap ? less_than : greater_than,
-		.swp = swap_ints,
+		.swp = NULL,
 	};
 	int i, temp, err;
 
@@ -136,7 +128,7 @@ static __init int test_heap_pop_push(bool min_heap)
 	};
 	struct min_heap_callbacks funcs = {
 		.less = min_heap ? less_than : greater_than,
-		.swp = swap_ints,
+		.swp = NULL,
 	};
 	int i, temp, err;
 
@@ -175,7 +167,7 @@ static __init int test_heap_del(bool min_heap)
 	heap.nr = ARRAY_SIZE(values);
 	struct min_heap_callbacks funcs = {
 		.less = min_heap ? less_than : greater_than,
-		.swp = swap_ints,
+		.swp = NULL,
 	};
 	int i, err;