shithub: gefs

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cache: fix lock ordering issue

--- a/cache.c

+++ b/cache.c

@@ -137,18 +137,18 @@

 	bkt = &fs->bcache[h % fs->cmax];

+	qlock(&fs->lrulk);

 	lock(bkt);

 	for(b = bkt->b; b != nil; b = b->hnext){

 		if(b->bp.addr == off){

  			holdblk(b);

-			qlock(&fs->lrulk);

 			lrudel(b);

-			qunlock(&fs->lrulk);

 			b->lasthold = getcallerpc(&off);

 			break;

 		}

 	}

 	unlock(bkt);

+	qunlock(&fs->lrulk);

 	return b;

 }