[PATCH v2] bdi: show error log when fail to create bdi debugfs entry
STALE3177d
From: weiping zhang <hidden>
Date: 2018-01-10 16:36:37
Subsystem:
memory management, memory management - misc, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
bdi debugfs dir/file may create fail, add error log here. Signed-off-by: weiping zhang <redacted> --- V1->V2: fix indentation and make log message more clear mm/backing-dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index b5f940c..0a49665 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c@@ -885,7 +885,9 @@ int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args) cgwb_bdi_register(bdi); bdi->dev = dev; - bdi_debug_register(bdi, dev_name(dev)); + if (bdi_debug_register(bdi, dev_name(dev))) + pr_warn("blkdev %s: creation of bdi debugfs entries failed.\n", + dev_name(dev)); set_bit(WB_registered, &bdi->wb.state); spin_lock_bh(&bdi_lock);
--
2.9.4