fix compile error on DMC_DEBUG true

Change-Id: I3f3c7ccc74a99dfa42e80650b7f04e98f26756a7

Author: lishuhao

src/flashcache_main.c

@@ -514,7 +514,7 @@ flashcache_do_pending_noerror(struct kcached_job *job)
 		cacheblk->nr_queued--;
 		if (pending_job->action == INVALIDATE) {
 			DPRINTK("flashcache_do_pending: INVALIDATE  %llu",
-				next_job->bio->bi_sector);
+				pending_job->bio->bi_sector);
 			VERIFY(pending_job->bio != NULL);
 			queued = flashcache_inval_blocks(dmc, pending_job->bio);
 			if (queued) {
@@ -1683,6 +1683,7 @@ flashcache_inval_block_set_v3(struct cache_c *dmc, int set, struct bio *bio,
 	int rw = bio_data_dir(bio);
 	sector_t io_start;
 	sector_t mask;
+	sector_t start_dbn;
 
 	mask = ~((1 << dmc->block_shift) - 1);
 	io_start = bio->bi_sector & mask;
@@ -1717,6 +1718,7 @@ flashcache_inval_block_set_v3(struct cache_c *dmc, int set, struct bio *bio,
 	}
 	if (!(cacheblk->cache_state & (BLOCK_IO_INPROG | DIRTY)) &&
 	    (cacheblk->nr_queued == 0)) {
+		start_dbn = dmc->cache[index].dbn;
 		atomic_dec(&dmc->cached_blocks);
 		DPRINTK("Cache invalidate (!BUSY): Block %llu %lx",
 			start_dbn, cacheblk->cache_state);