[PATCH 2/4] fs: introduce four macros for in-kernel hints

Kanchan Joshi
2019-01-09T15:33:42Z

Exiting write-hints are exposed to user-mode. There is a possiblity
of conflict if kernel happens to use those. This patch introduces four
write-hints for exclusive kernel-mode use.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
---
include/linux/fs.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 811c777..e8548eb 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -291,6 +291,11 @@ enum rw_hint {
WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM,
WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG,
WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME,
+/* below ones are meant for in-kernel use */
+ KERN_WRITE_LIFE_SHORT,
+ KERN_WRITE_LIFE_MEDIUM,
+ KERN_WRITE_LIFE_LONG,
+ KERN_WRITE_LIFE_EXTREME
};

#define IOCB_EVENTFD (1 << 0)
--
2.7.4