Branch HEAD

[fs/lustre-release.git] / ldiskfs / configure.ac

diff --git a/ldiskfs/configure.ac b/ldiskfs/configure.ac
index 2fd0185..405b8e3 100644 (file)
--- a/ldiskfs/configure.ac
+++ b/ldiskfs/configure.ac
@@ -90,20 +90,29 @@ AM_CONDITIONAL(USE_QUILT, test x$QUILT != xno)
 
 LB_DEFINE_LDISKFS_OPTIONS
 
-AC_MSG_CHECKING([whether to build ldisk based on ext4])
-AC_ARG_ENABLE([ext4],
-             AC_HELP_STRING([--disable-ext4],
-                            [enable building of ldiskfs based on ext4]),[],
-                            [LC_KERNEL_WITH_EXT4([enable_ext4='yes'],
-                            [enable_ext4='no'])])
+AC_MSG_CHECKING([whether to build ldiskfs based on ext4])
+if test x$RHEL_KERNEL = xyes; then
+       AC_ARG_ENABLE([ext4],
+               AC_HELP_STRING([--enable-ext4],
+                            [enable building of ldiskfs based on ext4]),
+                            [], [enable_ext4='no'])
+else
+       case $LINUXRELEASE in
+       # ext4 was in 2.6.22-2.6.26 but not stable enough to use
+       2.6.2[06]*) enable_ext4='no' ;;
+       *) LC_KERNEL_WITH_EXT4([enable_ext4='yes'],
+                              [enable_ext4='no']) ;;
+       esac
+fi
 AC_MSG_RESULT([$enable_ext4])
 
 if test x$enable_ext4 = xyes ; then
-        AC_DEFINE(HAVE_EXT4_LDISKFS, 1, [ldiskfs based on ext4])
-        BACKFS=ext4
+       AC_DEFINE(HAVE_EXT4_LDISKFS, 1, [ldiskfs based on ext4])
+       BACKFS=ext4
 else
-        BACKFS=ext3
+       BACKFS=ext3
 fi
+
 AC_SUBST(BACKFS)
 BACKFSU=${BACKFS/ext/EXT}
 AC_SUBST(BACKFSU) # We need a Upper string