1*3a896071SMartin Matuska# dnl 2*3a896071SMartin Matuska# dnl 5.8 (735e4ae5ba28) introduced a superblock scoped errseq_t to use to 3*3a896071SMartin Matuska# dnl record writeback errors for syncfs() to return. Up until 5.17, when 4*3a896071SMartin Matuska# dnl sync_fs errors were returned directly, this is the only way for us to 5*3a896071SMartin Matuska# dnl report an error from syncfs(). 6*3a896071SMartin Matuska# dnl 7*3a896071SMartin MatuskaAC_DEFUN([ZFS_AC_KERNEL_SRC_SUPER_BLOCK_S_WB_ERR], [ 8*3a896071SMartin Matuska ZFS_LINUX_TEST_SRC([super_block_s_wb_err], [ 9*3a896071SMartin Matuska #include <linux/fs.h> 10*3a896071SMartin Matuska 11*3a896071SMartin Matuska static const struct super_block 12*3a896071SMartin Matuska sb __attribute__ ((unused)) = { 13*3a896071SMartin Matuska .s_wb_err = 0, 14*3a896071SMartin Matuska }; 15*3a896071SMartin Matuska ],[]) 16*3a896071SMartin Matuska]) 17*3a896071SMartin Matuska 18*3a896071SMartin MatuskaAC_DEFUN([ZFS_AC_KERNEL_SUPER_BLOCK_S_WB_ERR], [ 19*3a896071SMartin Matuska AC_MSG_CHECKING([whether super_block has s_wb_err]) 20*3a896071SMartin Matuska ZFS_LINUX_TEST_RESULT([super_block_s_wb_err], [ 21*3a896071SMartin Matuska AC_MSG_RESULT(yes) 22*3a896071SMartin Matuska AC_DEFINE(HAVE_SUPER_BLOCK_S_WB_ERR, 1, 23*3a896071SMartin Matuska [have super_block s_wb_err]) 24*3a896071SMartin Matuska ],[ 25*3a896071SMartin Matuska AC_MSG_RESULT(no) 26*3a896071SMartin Matuska ]) 27*3a896071SMartin Matuska]) 28