[LTP] [PATCH 2/3] tst_fs.h: Improve tst_fibmap() doc

[Petr Vorel]

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 include/tst_fs.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/tst_fs.h b/include/tst_fs.h
index 769fac1e5..3dd0d7524 100644
--- a/include/tst_fs.h
+++ b/include/tst_fs.h
@@ -209,7 +209,10 @@ int tst_fs_in_skiplist(const char *fs_type, const char *const *skiplist);
 void tst_fill_fs(const char *path, int verbose, enum tst_fill_access_pattern pattern);
 
 /*
- * test if FIBMAP ioctl is supported
+ * Check if FIBMAP ioctl is supported.
+ * Tests which use tst_fibmap() should use .needs_root = 1 to avoid EPERM.
+ *
+ * @return 0: FIBMAP is supported, 1: FIBMAP is *not* supported.
  */
 int tst_fibmap(const char *filename);
 
-- 
2.42.0