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 e855aea..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
 #
-# 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_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])
 ])
 ])
 
@@ -307,27 +298,6 @@ AC_DEFUN([LC_EXPORT_NODE_TO_CPUMASK],
           ])
 
 #
-# LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
-#
-# Check for our patched grab_cache_page_nowait_gfp() function
-# after 2.6.29 we can emulate this using add_to_page_cache_lru()
-#
-AC_DEFUN([LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP],
-[LB_CHECK_SYMBOL_EXPORT([grab_cache_page_nowait_gfp],
-[mm/filemap.c],[
-        AC_DEFINE(HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP, 1,
-                  [kernel exports grab_cache_page_nowait_gfp])
-        ],
-        [LB_CHECK_SYMBOL_EXPORT([add_to_page_cache_lru],
-        [mm/filemap.c],[
-                AC_DEFINE(HAVE_ADD_TO_PAGE_CACHE_LRU, 1,
-                        [kernel exports add_to_page_cache_lru])
-        ],[
-        ])
-        ])
-])
-
-#
 #
 # between 2.6.5 - 2.6.22 filemap_populate is exported in some kernels
 #
@@ -1934,6 +1904,7 @@ AC_DEFUN([LC_SET_CPUS_ALLOWED],
 # LC_D_OBTAIN_ALIAS
 # starting from 2.6.28 kernel replaces d_alloc_anon() with
 # d_obtain_alias() for getting anonymous dentries
+# RHEL5(2.6.18) has d_obtain_alias but SLES11SP0(2.6.27) not
 #
 AC_DEFUN([LC_D_OBTAIN_ALIAS],
 [AC_MSG_CHECKING([d_obtain_alias exist in kernel])
@@ -2145,7 +2116,6 @@ AC_DEFUN([LC_PROG_LINUX],
          LC_EXPORT___D_REHASH
          LC_EXPORT_NODE_TO_CPUMASK
 
-         LC_FUNC_GRAB_CACHE_PAGE_NOWAIT_GFP
          LC_FILEMAP_POPULATE
          LC_BIT_SPINLOCK_H
 
@@ -2170,7 +2140,6 @@ AC_DEFUN([LC_PROG_LINUX],
 
          # 2.6.12
          LC_RW_TREE_LOCK
-         LC_EXPORT_SYNCHRONIZE_RCU
 
          # 2.6.15
          LC_INODE_I_MUTEX
@@ -2525,6 +2494,7 @@ if test x$enable_split != xno; then
 fi
 ])
 
+# RHEL5(2.6.18) has tux_info
 AC_DEFUN([LC_TASK_CLENV_TUX_INFO],
 [AC_MSG_CHECKING([tux_info])
 LB_LINUX_TRY_COMPILE([