77 lines
2.2 KiB
Text
77 lines
2.2 KiB
Text
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dnl #
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dnl # 3.17 API change,
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dnl # wait_on_bit() no longer requires an action argument. The former
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dnl # "wait_on_bit" interface required an 'action' function to be provided
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dnl # which does the actual waiting. There were over 20 such functions in the
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dnl # kernel, many of them identical, though most cases can be satisfied by one
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dnl # of just two functions: one which uses io_schedule() and one which just
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dnl # uses schedule(). This API change was made to consolidate all of those
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dnl # redundant wait functions.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_WAIT_ON_BIT], [
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AC_MSG_CHECKING([whether wait_on_bit() takes an action])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/wait.h>
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],[
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int (*action)(void *) = NULL;
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wait_on_bit(NULL, 0, action, 0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 4.13 API change
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dnl # Renamed struct wait_queue -> struct wait_queue_entry.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_WAIT_QUEUE_ENTRY_T], [
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AC_MSG_CHECKING([whether wait_queue_entry_t exists])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/wait.h>
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],[
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wait_queue_entry_t *entry __attribute__ ((unused));
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_T, 1,
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[wait_queue_entry_t exists])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 4.13 API change
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dnl # Renamed wait_queue_head::task_list -> wait_queue_head::head
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dnl # Renamed wait_queue_entry::task_list -> wait_queue_entry::entry
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_WAIT_QUEUE_HEAD_ENTRY], [
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AC_MSG_CHECKING([whether wq_head->head and wq_entry->entry exist])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/wait.h>
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#ifdef HAVE_WAIT_QUEUE_ENTRY_T
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typedef wait_queue_head_t spl_wait_queue_head_t;
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typedef wait_queue_entry_t spl_wait_queue_entry_t;
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#else
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typedef wait_queue_head_t spl_wait_queue_head_t;
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typedef wait_queue_t spl_wait_queue_entry_t;
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#endif
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],[
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spl_wait_queue_head_t wq_head;
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spl_wait_queue_entry_t wq_entry;
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struct list_head *head __attribute__ ((unused));
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struct list_head *entry __attribute__ ((unused));
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head = &wq_head.head;
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entry = &wq_entry.entry;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_WAIT_QUEUE_HEAD_ENTRY, 1,
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[wq_head->head and wq_entry->entry exist])
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],[
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AC_MSG_RESULT(no)
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])
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])
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