X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=block%2Fblk-cgroup.h;h=371fe8e92ab59ad30b84b0cd43f43bea5230b807;hb=32d01dc7be4e725ab85ce1d74e8f4adc02ad68dd;hp=604f6d99ab92ca859d46b7ff7d8ce4b5519ebb61;hpb=57a7744e09867ebcfa0ccf1d6d529caa7728d552;p=cascardo%2Flinux.git

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 604f6d99ab92..371fe8e92ab5 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -186,7 +186,7 @@ static inline struct blkcg *css_to_blkcg(struct cgroup_subsys_state *css)
 
 static inline struct blkcg *task_blkcg(struct task_struct *tsk)
 {
-	return css_to_blkcg(task_css(tsk, blkio_subsys_id));
+	return css_to_blkcg(task_css(tsk, blkio_cgrp_id));
 }
 
 static inline struct blkcg *bio_blkcg(struct bio *bio)
@@ -241,12 +241,16 @@ static inline struct blkcg_gq *pd_to_blkg(struct blkg_policy_data *pd)
  */
 static inline int blkg_path(struct blkcg_gq *blkg, char *buf, int buflen)
 {
-	int ret;
+	char *p;
 
-	ret = cgroup_path(blkg->blkcg->css.cgroup, buf, buflen);
-	if (ret)
+	p = cgroup_path(blkg->blkcg->css.cgroup, buf, buflen);
+	if (!p) {
 		strncpy(buf, "<unavailable>", buflen);
-	return ret;
+		return -ENAMETOOLONG;
+	}
+
+	memmove(buf, p, buf + buflen - p);
+	return 0;
 }
 
 /**