1dnl # 2dnl # Check available BDI interfaces. 3dnl # 4AC_DEFUN([ZFS_AC_KERNEL_SRC_BDI], [ 5 ZFS_LINUX_TEST_SRC([super_setup_bdi_name], [ 6 #include <linux/fs.h> 7 struct super_block sb; 8 ], [ 9 char *name = "bdi"; 10 atomic_long_t zfs_bdi_seq; 11 int error __attribute__((unused)); 12 atomic_long_set(&zfs_bdi_seq, 0); 13 error = 14 super_setup_bdi_name(&sb, "%.28s-%ld", name, 15 atomic_long_inc_return(&zfs_bdi_seq)); 16 ]) 17 18 ZFS_LINUX_TEST_SRC([bdi_setup_and_register], [ 19 #include <linux/backing-dev.h> 20 struct backing_dev_info bdi; 21 ], [ 22 char *name = "bdi"; 23 int error __attribute__((unused)) = 24 bdi_setup_and_register(&bdi, name); 25 ]) 26 27 ZFS_LINUX_TEST_SRC([bdi_setup_and_register_3args], [ 28 #include <linux/backing-dev.h> 29 struct backing_dev_info bdi; 30 ], [ 31 char *name = "bdi"; 32 unsigned int cap = BDI_CAP_MAP_COPY; 33 int error __attribute__((unused)) = 34 bdi_setup_and_register(&bdi, name, cap); 35 ]) 36]) 37 38AC_DEFUN([ZFS_AC_KERNEL_BDI], [ 39 dnl # 40 dnl # 4.12, super_setup_bdi_name() introduced. 41 dnl # 42 AC_MSG_CHECKING([whether super_setup_bdi_name() exists]) 43 ZFS_LINUX_TEST_RESULT_SYMBOL([super_setup_bdi_name], 44 [super_setup_bdi_name], [fs/super.c], [ 45 AC_MSG_RESULT(yes) 46 AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1, 47 [super_setup_bdi_name() exits]) 48 ], [ 49 AC_MSG_RESULT(no) 50 51 dnl # 52 dnl # 4.0 - 4.11, bdi_setup_and_register() takes 2 arguments. 53 dnl # 54 AC_MSG_CHECKING( 55 [whether bdi_setup_and_register() wants 2 args]) 56 ZFS_LINUX_TEST_RESULT_SYMBOL([bdi_setup_and_register], 57 [bdi_setup_and_register], [mm/backing-dev.c], [ 58 AC_MSG_RESULT(yes) 59 AC_DEFINE(HAVE_2ARGS_BDI_SETUP_AND_REGISTER, 1, 60 [bdi_setup_and_register() wants 2 args]) 61 ], [ 62 AC_MSG_RESULT(no) 63 64 dnl # 65 dnl # 2.6.34 - 3.19, bdi_setup_and_register() 66 dnl # takes 3 arguments. 67 dnl # 68 AC_MSG_CHECKING( 69 [whether bdi_setup_and_register() wants 3 args]) 70 ZFS_LINUX_TEST_RESULT_SYMBOL( 71 [bdi_setup_and_register_3args], 72 [bdi_setup_and_register], [mm/backing-dev.c], [ 73 AC_MSG_RESULT(yes) 74 AC_DEFINE(HAVE_3ARGS_BDI_SETUP_AND_REGISTER, 1, 75 [bdi_setup_and_register() wants 3 args]) 76 ], [ 77 ZFS_LINUX_TEST_ERROR([bdi_setup]) 78 ]) 79 ]) 80 ]) 81]) 82