staging/lustre: S_DIRSYNC is always defined in kernel

No need to check for it.
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre/lustre_idl.h

@@ -2013,9 +2013,7 @@ static inline int ll_ext_to_inode_flags(int flags)
 	return (((flags & LUSTRE_SYNC_FL)      ? S_SYNC      : 0) |
 		((flags & LUSTRE_NOATIME_FL)   ? S_NOATIME   : 0) |
 		((flags & LUSTRE_APPEND_FL)    ? S_APPEND    : 0) |
-#if defined(S_DIRSYNC)
 		((flags & LUSTRE_DIRSYNC_FL)   ? S_DIRSYNC   : 0) |
-#endif
 		((flags & LUSTRE_IMMUTABLE_FL) ? S_IMMUTABLE : 0));
 }
 
@@ -2024,9 +2022,7 @@ static inline int ll_inode_to_ext_flags(int iflags)
 	return (((iflags & S_SYNC)      ? LUSTRE_SYNC_FL      : 0) |
 		((iflags & S_NOATIME)   ? LUSTRE_NOATIME_FL   : 0) |
 		((iflags & S_APPEND)    ? LUSTRE_APPEND_FL    : 0) |
-#if defined(S_DIRSYNC)
 		((iflags & S_DIRSYNC)   ? LUSTRE_DIRSYNC_FL   : 0) |
-#endif
 		((iflags & S_IMMUTABLE) ? LUSTRE_IMMUTABLE_FL : 0));
 }