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-rw-r--r--malloc/malloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index ecec901b14..aea4993f1b 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3034,7 +3034,7 @@ munmap_chunk (mchunkptr p)
     malloc_printerr ("munmap_chunk(): invalid pointer");
 
   atomic_decrement (&mp_.n_mmaps);
-  atomic_add (&mp_.mmapped_mem, -total_size);
+  atomic_fetch_add_relaxed (&mp_.mmapped_mem, -total_size);
 
   /* If munmap failed the process virtual memory address space is in a
      bad shape.  Just leave the block hanging around, the process will