mm-use-stack_depot-for-recording-kmemleaks-backtrace-fix

fix build - remove now-unused __save_stack_trace()

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: ke.wang <ke.wang@unisoc.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zhaoyang Huang <huangzhaoyang@gmail.com>
Cc: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/kmemleak.c

@@ -616,14 +616,6 @@ static inline depot_stack_handle_t set_track_prepare(void)
 }
 #endif
 
-/*
- * Save stack trace to the given array of MAX_TRACE size.
- */
-static int __save_stack_trace(unsigned long *trace)
-{
-	return stack_trace_save(trace, MAX_TRACE, 2);
-}
-
 /*
  * Create the metadata (struct kmemleak_object) corresponding to an allocated
  * memory block and add it to the object_list and object_tree_root (or