LU-354 test: Change dev_set_rdonly() check to warning

[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index 3181183..061d457 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -104,24 +104,15 @@ AC_DEFUN([LC_LUSTRE_VERSION_H],
 #
 # LC_FUNC_DEV_SET_RDONLY
 #
 #
 # LC_FUNC_DEV_SET_RDONLY
 #

-# check for the old-style dev_set_rdonly which took an extra "devno" param
-# and can only set a single device to discard writes at one time
+# check whether dev_set_rdonly is exported.  This is needed until we
+# have another mechanism to fence IO from the underlying device.

 #
 AC_DEFUN([LC_FUNC_DEV_SET_RDONLY],
 #
 AC_DEFUN([LC_FUNC_DEV_SET_RDONLY],

-[AC_MSG_CHECKING([if kernel has new dev_set_rdonly])
-LB_LINUX_TRY_COMPILE([
-        #include <linux/fs.h>
-        #include <linux/blkdev.h>
-],[
-        #ifndef HAVE_CLEAR_RDONLY_ON_PUT
-        #error needs to be patched by lustre kernel patches from Lustre version 1.4.3 or above.
-        #endif
-],[
-        AC_MSG_RESULT([yes])
-        AC_DEFINE(HAVE_DEV_SET_RDONLY, 1, [kernel has new dev_set_rdonly])
+[LB_CHECK_SYMBOL_EXPORT([dev_set_rdonly],
+[block/ll_rw_block.c,block/blk-core.c],[
+        AC_DEFINE(HAVE_DEV_SET_RDONLY, 1, [kernel exports dev_set_rdonly])

 ],[
 ],[

-        AC_MSG_ERROR([no, Linux kernel source needs to be patches by lustre
-kernel patches from Lustre version 1.4.3 or above.])
+        AC_MSG_WARN([kernel missing dev_set_rdonly patch for testing])

 ])
 ])
 
 ])
 ])