temp

drivers/md/bcache/bset.c

diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 4385303..f541d3e 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -545,7 +545,6 @@ static struct bkey *tree_to_bkey(struct bset_tree *t, unsigned int j)
 {
 	return cacheline_to_bkey(t, to_inorder(j, t), t->tree[j].m);
 }
-
 static struct bkey *tree_to_prev_bkey(struct bset_tree *t, unsigned int j)
 {
 	return (void *) (((uint64_t *) tree_to_bkey(t, j)) - t->prev[j]);
@@ -584,9 +583,12 @@ static inline uint64_t shrd128(uint64_t high, uint64_t low, uint8_t shift)
 static inline unsigned int bfloat_mantissa(const struct bkey *k,
 				       struct bkey_float *f)
 {
-	const uint64_t *p = &k->low - (f->exponent >> 6);
-
-	return shrd128(p[-1], p[0], f->exponent & 63) & BKEY_MANTISSA_MASK;
+	if (!(f->exponent >> 6))
+		return shrd128(0, KEY_INODE(k), f->exponent & 63) &
+		       BKEY_MANTISSA_MASK;
+	else 
+		return shrd128(KEY_INODE(k), k->low, f->exponent & 63) &
+		       BKEY_MANTISSA_MASK;
 }
 
 static void make_bfloat(struct bset_tree *t, unsigned int j)
@@ -621,7 +623,10 @@ static void make_bfloat(struct bset_tree *t, unsigned int j)
 	else
 		f->exponent = fls64(r->low ^ l->low);
 
-	f->exponent = max_t(int, f->exponent - BKEY_MANTISSA_BITS, 0);
+	if (f->exponent > BKEY_MANTISSA_BITS)
+		f->exponent -= BKEY_MANTISSA_BITS;
+	else
+		f->exponent = 0;
 
 	/*
 	 * Setting f->exponent = 127 flags this node as failed, and causes the

drivers/md/bcache/btree.c

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index ac8a99e..db431c2 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -99,7 +99,7 @@
 #define PTR_HASH(c, k)							\
 	(((k)->ptr[0] >> c->bucket_bits) | PTR_GEN(k, 0))
 
-#define insert_lock(s, b)	((b)->level <= (s)->lock)
+#define insert_lock(s, b)	((s)->level >= (b)->lock)
 
 /*
  * These macros are for recursing down the btree - they handle the details of

drivers/md/bcache/btree.h

diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index 3b1a423..b7d285d 100644
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -228,17 +228,20 @@ static inline void bch_btree_op_init(struct btree_op *op, int write_lock_level)
 
 static inline void rw_lock(bool w, struct btree *b, int level)
 {
-	w ? down_write_nested(&b->lock, level + 1)
-	  : down_read_nested(&b->lock, level + 1);
-	if (w)
+	if (w) {
+		down_write_nested(&b->lock, level + 1);
 		b->seq++;
+	} else
+		down_read_nested(&b->lock, level + 1);
 }
 
 static inline void rw_unlock(bool w, struct btree *b)
 {
-	if (w)
+	if (w) {
 		b->seq++;
-	(w ? up_write : up_read)(&b->lock);
+		up_write(&b->lock);
+	} else
+		up_read(&b->lock);
 }
 
 void bch_btree_node_read_done(struct btree *b);