mirror_zfs/config/kernel-make-request-fn.m4
Brian Behlendorf 68dde63d13
Linux 5.7 compat: blk_alloc_queue()
Commit https://github.com/torvalds/linux/commit/3d745ea5 simplified
the blk_alloc_queue() interface by updating it to take the request
queue as an argument.  Add a wrapper function which accepts the new
arguments and internally uses the available interfaces.

Other minor changes include increasing the Linux-Maximum to 5.6 now
that 5.6 has been released.  It was not bumped to 5.7 because this
release has not yet been finalized and is still subject to change.

Added local 'struct zvol_state_os *zso' variable to zvol_alloc.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10181 
Closes #10187
2020-04-09 09:16:46 -07:00

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dnl #
dnl # Check for make_request_fn interface.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_MAKE_REQUEST_FN], [
ZFS_LINUX_TEST_SRC([make_request_fn_void], [
#include <linux/blkdev.h>
void make_request(struct request_queue *q,
struct bio *bio) { return; }
],[
blk_queue_make_request(NULL, &make_request);
])
ZFS_LINUX_TEST_SRC([make_request_fn_blk_qc_t], [
#include <linux/blkdev.h>
blk_qc_t make_request(struct request_queue *q,
struct bio *bio) { return (BLK_QC_T_NONE); }
],[
blk_queue_make_request(NULL, &make_request);
])
ZFS_LINUX_TEST_SRC([blk_alloc_queue_request_fn], [
#include <linux/blkdev.h>
blk_qc_t make_request(struct request_queue *q,
struct bio *bio) { return (BLK_QC_T_NONE); }
],[
struct request_queue *q __attribute__ ((unused));
q = blk_alloc_queue(make_request, NUMA_NO_NODE);
])
])
AC_DEFUN([ZFS_AC_KERNEL_MAKE_REQUEST_FN], [
dnl #
dnl # Linux 5.7 API Change
dnl # blk_alloc_queue() expects request function.
dnl #
AC_MSG_CHECKING([whether blk_alloc_queue() expects request function])
ZFS_LINUX_TEST_RESULT([blk_alloc_queue_request_fn], [
AC_MSG_RESULT(yes)
dnl # Checked as part of the blk_alloc_queue_request_fn test
AC_MSG_CHECKING([whether make_request_fn() returns blk_qc_t])
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_ALLOC_QUEUE_REQUEST_FN, 1,
[blk_alloc_queue() expects request function])
AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t,
[make_request_fn() return type])
AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1,
[Noting that make_request_fn() returns blk_qc_t])
],[
dnl #
dnl # Linux 3.2 API Change
dnl # make_request_fn returns void.
dnl #
AC_MSG_CHECKING([whether make_request_fn() returns void])
ZFS_LINUX_TEST_RESULT([make_request_fn_void], [
AC_MSG_RESULT(yes)
AC_DEFINE(MAKE_REQUEST_FN_RET, void,
[make_request_fn() return type])
AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_VOID, 1,
[Noting that make_request_fn() returns void])
],[
AC_MSG_RESULT(no)
dnl #
dnl # Linux 4.4 API Change
dnl # make_request_fn returns blk_qc_t.
dnl #
AC_MSG_CHECKING(
[whether make_request_fn() returns blk_qc_t])
ZFS_LINUX_TEST_RESULT([make_request_fn_blk_qc_t], [
AC_MSG_RESULT(yes)
AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t,
[make_request_fn() return type])
AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1,
[Noting that make_request_fn() ]
[returns blk_qc_t])
],[
ZFS_LINUX_TEST_ERROR([make_request_fn])
])
])
])
])