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-rw-r--r--fs/bio.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 060859c6909..df99c882b80 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -29,6 +29,8 @@
#include <trace/block.h>
#include <scsi/sg.h> /* for struct sg_iovec */
+DEFINE_TRACE(block_split);
+
static struct kmem_cache *bio_slab __read_mostly;
static mempool_t *bio_split_pool __read_mostly;