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 <[email protected]> --- 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
