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dnl #
dnl # 2.6.31 API change
dnl # In 2.6.29 kernels blk_end_request() was a GPL-only symbol, this was
dnl # changed in 2.6.31 so it may be used by non-GPL modules.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLK_END_REQUEST], [
AC_MSG_CHECKING([whether blk_end_request() is available])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
struct request *req = NULL;
(void) blk_end_request(req, 0, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_END_REQUEST, 1,
[blk_end_request() is available])
],[
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING([whether blk_end_request() is GPL-only])
ZFS_LINUX_TRY_COMPILE([
#include <linux/module.h>
#include <linux/blkdev.h>
MODULE_LICENSE("$ZFS_META_LICENSE");
],[
struct request *req = NULL;
(void) blk_end_request(req, 0, 0);
],[
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_END_REQUEST_GPL_ONLY, 1,
[blk_end_request() is GPL-only])
])
EXTRA_KCFLAGS="$tmp_flags"
])
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