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dnl #
dnl # 2.6.32-2.6.35 API - The BIO_RW_UNPLUG enum can be used as a hint
dnl # to unplug the queue.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_RW_UNPLUG], [
ZFS_LINUX_TEST_SRC([blk_queue_bio_rw_unplug], [
#include <linux/blkdev.h>
],[
enum bio_rw_flags rw __attribute__ ((unused)) = BIO_RW_UNPLUG;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_UNPLUG], [
AC_MSG_CHECKING([whether the BIO_RW_UNPLUG enum is available])
ZFS_LINUX_TEST_RESULT([blk_queue_bio_rw_unplug], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_HAVE_BIO_RW_UNPLUG, 1,
[BIO_RW_UNPLUG is available])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_PLUG], [
ZFS_LINUX_TEST_SRC([blk_plug], [
#include <linux/blkdev.h>
],[
struct blk_plug plug __attribute__ ((unused));
blk_start_plug(&plug);
blk_finish_plug(&plug);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_PLUG], [
AC_MSG_CHECKING([whether struct blk_plug is available])
ZFS_LINUX_TEST_RESULT([blk_plug], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_HAVE_BLK_PLUG, 1,
[struct blk_plug is available])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_PLUG], [
ZFS_AC_KERNEL_SRC_BIO_RW_UNPLUG
ZFS_AC_KERNEL_SRC_BLK_PLUG
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_PLUG], [
ZFS_AC_KERNEL_BIO_RW_UNPLUG
ZFS_AC_KERNEL_BLK_PLUG
])
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