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zfs/config/kernel-bio-rw-syncio.m4

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Required autoconf support for vdev_disk integration with 2.6.30 kernels. 2.6.22 API change Unused destroy_dirty_buffers arg removed from prototype. 2.6.24 API change Empty write barriers are now supported and we should use them. 2.6.24 API change Size argument dropped from bio_endio and bi_end_io, because the bi_end_io is only called once now when the request is complete. There is no longer any need for a size argument. This also means that partial IO's are no longer possibe and the end_io callback should not check bi->bi_size. Finally, the return type was updated to void. 2.6.28 API change open/close_bdev_excl() renamed to open/close_bdev_exclusive(). 2.6.29 API change BIO_RW_SYNC renamed to BIO_RW_SYNCIO.
2009-07-30 00:14:23 +00:00
dnl #
dnl # 2.6.29 API change
dnl # BIO_RW_SYNC renamed to BIO_RW_SYNCIO
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNCIO], [
AC_MSG_CHECKING([whether BIO_RW_SYNCIO is defined])
ZFS_LINUX_TRY_COMPILE([
#include <linux/bio.h>
],[
Additional ZVOL compatibility autoconf checks and zconfig ZVOL sanity test.
2009-11-20 18:04:56 +00:00
int flags;
flags = BIO_RW_SYNCIO;
Required autoconf support for vdev_disk integration with 2.6.30 kernels. 2.6.22 API change Unused destroy_dirty_buffers arg removed from prototype. 2.6.24 API change Empty write barriers are now supported and we should use them. 2.6.24 API change Size argument dropped from bio_endio and bi_end_io, because the bi_end_io is only called once now when the request is complete. There is no longer any need for a size argument. This also means that partial IO's are no longer possibe and the end_io callback should not check bi->bi_size. Finally, the return type was updated to void. 2.6.28 API change open/close_bdev_excl() renamed to open/close_bdev_exclusive(). 2.6.29 API change BIO_RW_SYNC renamed to BIO_RW_SYNCIO.
2009-07-30 00:14:23 +00:00
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1,
[BIO_RW_SYNCIO is defined])
],[
AC_MSG_RESULT(no)
])
])