diff options
Diffstat (limited to 'config/kernel-wait.m4')
| -rw-r--r-- | config/kernel-wait.m4 | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/config/kernel-wait.m4 b/config/kernel-wait.m4 new file mode 100644 index 000000000000..0414242bf6d4 --- /dev/null +++ b/config/kernel-wait.m4 @@ -0,0 +1,99 @@ +dnl # +dnl # 4.13 API change +dnl # Renamed struct wait_queue -> struct wait_queue_entry. +dnl # +dnl # N.B. The type check is performed before all other checks +dnl # since ZFS_AC_KERNEL_SRC_WAIT_QUEUE_HEAD_ENTRY depends on +dnl # HAVE_WAIT_QUEUE_ENTRY_T being set in confdefs.h. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_WAIT_QUEUE_ENTRY_T], [ + AC_MSG_CHECKING([whether wait_queue_entry_t exists]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/wait.h> + ],[ + wait_queue_entry_t *entry __attribute__ ((unused)); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_T, 1, + [wait_queue_entry_t exists]) + ],[ + AC_MSG_RESULT(no) + ]) +]) + +dnl # +dnl # 3.17 API change, +dnl # wait_on_bit() no longer requires an action argument. The former +dnl # "wait_on_bit" interface required an 'action' function to be provided +dnl # which does the actual waiting. There were over 20 such functions in the +dnl # kernel, many of them identical, though most cases can be satisfied by one +dnl # of just two functions: one which uses io_schedule() and one which just +dnl # uses schedule(). This API change was made to consolidate all of those +dnl # redundant wait functions. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_SRC_WAIT_ON_BIT], [ + ZFS_LINUX_TEST_SRC([wait_on_bit], [ + #include <linux/wait.h> + ],[ + int (*action)(void *) = NULL; + wait_on_bit(NULL, 0, action, 0); + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_WAIT_ON_BIT], [ + AC_MSG_CHECKING([whether wait_on_bit() takes an action]) + ZFS_LINUX_TEST_RESULT([wait_on_bit], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes]) + ],[ + AC_MSG_RESULT(no) + ]) +]) + +dnl # +dnl # 4.13 API change +dnl # Renamed wait_queue_head::task_list -> wait_queue_head::head +dnl # Renamed wait_queue_entry::task_list -> wait_queue_entry::entry +dnl # +AC_DEFUN([ZFS_AC_KERNEL_SRC_WAIT_QUEUE_HEAD_ENTRY], [ + ZFS_LINUX_TEST_SRC([wait_queue_head_entry], [ + #include <linux/wait.h> + + #ifdef HAVE_WAIT_QUEUE_ENTRY_T + typedef wait_queue_head_t spl_wait_queue_head_t; + typedef wait_queue_entry_t spl_wait_queue_entry_t; + #else + typedef wait_queue_head_t spl_wait_queue_head_t; + typedef wait_queue_t spl_wait_queue_entry_t; + #endif + ],[ + spl_wait_queue_head_t wq_head; + spl_wait_queue_entry_t wq_entry; + struct list_head *head __attribute__ ((unused)); + struct list_head *entry __attribute__ ((unused)); + + head = &wq_head.head; + entry = &wq_entry.entry; + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_WAIT_QUEUE_HEAD_ENTRY], [ + AC_MSG_CHECKING([whether wq_head->head and wq_entry->entry exist]) + ZFS_LINUX_TEST_RESULT([wait_queue_head_entry], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_WAIT_QUEUE_HEAD_ENTRY, 1, + [wq_head->head and wq_entry->entry exist]) + ],[ + AC_MSG_RESULT(no) + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_SRC_WAIT], [ + ZFS_AC_KERNEL_SRC_WAIT_ON_BIT + ZFS_AC_KERNEL_SRC_WAIT_QUEUE_HEAD_ENTRY +]) + +AC_DEFUN([ZFS_AC_KERNEL_WAIT], [ + ZFS_AC_KERNEL_WAIT_ON_BIT + ZFS_AC_KERNEL_WAIT_QUEUE_HEAD_ENTRY +]) |