bcache: Kill bucket->gc_gen
gc_gen was a temporary used to recalculate last_gc, but since we only need
bucket->last_gc when gc isn't running (gc_mark_valid = 1), we can just update
last_gc directly.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 200efc1..82c9c5d 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -196,7 +196,6 @@
uint16_t prio;
uint8_t gen;
uint8_t last_gc; /* Most out of date gen in the btree */
- uint8_t gc_gen;
uint16_t gc_mark; /* Bitfield used by GC. See below for field */
};
@@ -588,7 +587,7 @@
uint16_t min_prio;
/*
- * max(gen - gc_gen) for all buckets. When it gets too big we have to gc
+ * max(gen - last_gc) for all buckets. When it gets too big we have to gc
* to keep gens from wrapping around.
*/
uint8_t need_gc;