[LTP] [PATCH 1/3] lapi/fcntl.h: Fix O_DIRECT definition for various archs

[Petr Vorel]

O_DIRECT definitions differ a lot depending on architecture.
Because this can lead to problems (e.g. the generic value O_DIRECT
040000 is O_DIRECTORY on powerpc, address that in lapi file.

NOTE: Deliberately use correct definitions also on less common archs
(maybe LTP even cannot be compiled on m68k or mips, but better to be
safe then sorry).  But the problem would IMHO be avoided if the fallback
O_DIRECT definition would be removed everywhere and tests just define
_GNU_SOURCE (no library code is using O_DIRECT atm).

Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 include/lapi/fcntl.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/lapi/fcntl.h b/include/lapi/fcntl.h
index 848ac7865..27da9f076 100644
--- a/include/lapi/fcntl.h
+++ b/include/lapi/fcntl.h
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
+ * Copyright (c) Linux Test Project, 2014-2023
  */
 
 #ifndef LAPI_FCNTL_H__
@@ -11,7 +12,15 @@
 #include <sys/socket.h>
 
 #ifndef O_DIRECT
-# define O_DIRECT 040000
+# if defined(__mips__)
+#  define O_DIRECT 0100000
+# elif defined(__arm__) || defined(__aarch64__) || defined(__m68k__)
+#  define O_DIRECT 0200000
+# elif defined(__powerpc__) || defined(__powerpc64__)
+#  define O_DIRECT 0400000
+# else
+#  define O_DIRECT 040000
+# endif
 #endif
 
 #ifndef O_CLOEXEC
-- 
2.40.1