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config: remove HAVE_BLK_QUEUE_WRITE_CACHE/HAVE_BLK_QUEUE_FLUSH

Browse Source 
Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16479
This commit is contained in:
Rob Norris 2024-08-16 16:23:25 +10:00 committed by Brian Behlendorf
parent 43bf9a712b
commit ddf5122a29
2 changed files with 0 additions and 97 deletions
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73
config/kernel-blk-queue.m4
View File

@ -269,77 +269,6 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLAG_CLEAR], [
])
])
dnl #
dnl # 2.6.36 API change,
dnl # Added blk_queue_flush() interface, while the previous interface
dnl # was available to all the new one is GPL-only. Thus in addition to
dnl # detecting if this function is available we determine if it is
dnl # GPL-only. If the GPL-only interface is there we implement our own
dnl # compatibility function, otherwise we use the function. The hope
dnl # is that long term this function will be opened up.
dnl #
dnl # 4.7 API change,
dnl # Replace blk_queue_flush with blk_queue_write_cache
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH], [
ZFS_LINUX_TEST_SRC([blk_queue_flush], [
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
(void) blk_queue_flush(q, REQ_FLUSH);
], [], [ZFS_META_LICENSE])
ZFS_LINUX_TEST_SRC([blk_queue_write_cache], [
#include <linux/kernel.h>
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
blk_queue_write_cache(q, true, true);
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLUSH], [
AC_MSG_CHECKING([whether blk_queue_flush() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_flush], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLUSH, 1,
[blk_queue_flush() is available])
AC_MSG_CHECKING([whether blk_queue_flush() is GPL-only])
ZFS_LINUX_TEST_RESULT([blk_queue_flush_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY, 1,
[blk_queue_flush() is GPL-only])
])
],[
AC_MSG_RESULT(no)
])
dnl #
dnl # 4.7 API change
dnl # Replace blk_queue_flush with blk_queue_write_cache
dnl #
AC_MSG_CHECKING([whether blk_queue_write_cache() exists])
ZFS_LINUX_TEST_RESULT([blk_queue_write_cache], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE, 1,
[blk_queue_write_cache() exists])
AC_MSG_CHECKING([whether blk_queue_write_cache() is GPL-only])
ZFS_LINUX_TEST_RESULT([blk_queue_write_cache_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY, 1,
[blk_queue_write_cache() is GPL-only])
])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.34 API change
dnl # blk_queue_max_hw_sectors() replaces blk_queue_max_sectors().
@ -439,7 +368,6 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE], [
ZFS_AC_KERNEL_SRC_BLK_QUEUE_SECURE_ERASE
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_SET
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_CLEAR
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH
ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_HW_SECTORS
ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_SEGMENTS
ZFS_AC_KERNEL_SRC_BLK_MQ
@ -454,7 +382,6 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE], [
ZFS_AC_KERNEL_BLK_QUEUE_SECURE_ERASE
ZFS_AC_KERNEL_BLK_QUEUE_FLAG_SET
ZFS_AC_KERNEL_BLK_QUEUE_FLAG_CLEAR
ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
ZFS_AC_KERNEL_BLK_MQ

24
include/os/linux/kernel/linux/blkdev_compat.h
View File

@ -61,24 +61,12 @@ blk_queue_flag_clear(unsigned int flag, struct request_queue *q)
* Setting the flush flags directly is no longer possible; flush flags are set
* on the queue_limits structure and passed to blk_disk_alloc(). In this case
* we remove this function entirely.
*
* 4.7 API,
* The blk_queue_write_cache() interface has replaced blk_queue_flush()
* interface. However, the new interface is GPL-only thus we implement
* our own trivial wrapper when the GPL-only version is detected.
*
* 2.6.36 - 4.6 API,
* The blk_queue_flush() interface has replaced blk_queue_ordered()
* interface. However, while the old interface was available to all the
* new one is GPL-only. Thus if the GPL-only version is detected we
* implement our own trivial helper.
*/
#if !defined(HAVE_BLK_ALLOC_DISK_2ARG) || \
!defined(HAVE_BLKDEV_QUEUE_LIMITS_FEATURES)
static inline void
blk_queue_set_write_cache(struct request_queue *q, bool on)
{
#if defined(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY)
if (on) {
blk_queue_flag_set(QUEUE_FLAG_WC, q);
blk_queue_flag_set(QUEUE_FLAG_FUA, q);
@ -86,18 +74,6 @@ blk_queue_set_write_cache(struct request_queue *q, bool on)
blk_queue_flag_clear(QUEUE_FLAG_WC, q);
blk_queue_flag_clear(QUEUE_FLAG_FUA, q);
}
#elif defined(HAVE_BLK_QUEUE_WRITE_CACHE)
blk_queue_write_cache(q, on, on);
#elif defined(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY)
if (on)
q->flush_flags |= REQ_FLUSH | REQ_FUA;
else
q->flush_flags &= ~(REQ_FLUSH | REQ_FUA);
#elif defined(HAVE_BLK_QUEUE_FLUSH)
blk_queue_flush(q, on ? (REQ_FLUSH | REQ_FUA) : 0);
#else
#error "Unsupported kernel"
#endif
}
#endif /* !HAVE_BLK_ALLOC_DISK_2ARG || !HAVE_BLKDEV_QUEUE_LIMITS_FEATURES */