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dnl #
dnl # 2.6.31 API change
dnl # Request queue peek/retrieval interface cleanup, the blk_fetch_request()
dnl # function replaces the elv_next_request() and blk_fetch_request()
dnl # functions. The updated blk_fetch_request() function returns the
dnl # next available request and removed it from the request queue.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLK_FETCH_REQUEST], [
AC_MSG_CHECKING([whether blk_fetch_request() is available])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
struct request_queue *q = NULL;
(void) blk_fetch_request(q);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_FETCH_REQUEST, 1,
[blk_fetch_request() is available])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
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