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-rw-r--r--include/linux/bio.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index a279ba3..a00dfff 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -553,6 +553,13 @@ do { \
#define bio_dev(bio) \
disk_devt((bio)->bi_disk)
+#if defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP)
+int bio_associate_blkcg_from_page(struct bio *bio, struct page *page);
+#else
+static inline int bio_associate_blkcg_from_page(struct bio *bio,
+ struct page *page) { return 0; }
+#endif
+
#ifdef CONFIG_BLK_CGROUP
int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg);
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