dnl # dnl # 2.6.32 API change dnl # Private backing_device_info interfaces available dnl # AC_DEFUN([ZFS_AC_KERNEL_BDI], [ AC_MSG_CHECKING([whether super_block has s_bdi]) ZFS_LINUX_TRY_COMPILE([ #include <linux/fs.h> static const struct super_block sb __attribute__ ((unused)) { .s_bdi = NULL, } ],[ ],[ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_BDI, 1, [struct super_block has s_bdi]) ],[ AC_MSG_RESULT(no) ]) ])