projects / mirror_zfs-debian.git / blame
| Commit | Line | Data |
|---|---|---|
| b18019d2 ED |
1 | dnl # |
| 2 | dnl # 2.6.36 API change | |
| 3 | dnl # In 2.6.36 kernels the blk_queue_ordered() interface has been | |
| 4 | dnl # replaced by the simpler blk_queue_flush(). However, while the | |
| 5 | dnl # old interface was available to all the new one is GPL-only. | |
| 6 | dnl # Thus in addition to detecting if this function is available | |
| 7 | dnl # we determine if it is GPL-only. If the GPL-only interface is | |
| 8 | dnl # there we implement our own compatibility function, otherwise | |
| 9 | dnl # we use the function. The hope is that long term this function | |
| 10 | dnl # will be opened up. | |
| 11 | dnl # | |
| 12 | AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLUSH], [ | |
| 13 | AC_MSG_CHECKING([whether blk_queue_flush() is available]) | |
| 14 | tmp_flags="$EXTRA_KCFLAGS" | |
| e191b54e | 15 | EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}" |
| b18019d2 ED |
16 | ZFS_LINUX_TRY_COMPILE([ |
| 17 | #include <linux/blkdev.h> | |
| 18 | ],[ | |
| 19 | struct request_queue *q = NULL; | |
| 20 | (void) blk_queue_flush(q, REQ_FLUSH); | |
| 21 | ],[ | |
| 22 | AC_MSG_RESULT(yes) | |
| 23 | AC_DEFINE(HAVE_BLK_QUEUE_FLUSH, 1, | |
| 24 | [blk_queue_flush() is available]) | |
| 87dac73d AX |
25 | |
| 26 | AC_MSG_CHECKING([whether blk_queue_flush() is GPL-only]) | |
| 27 | ZFS_LINUX_TRY_COMPILE([ | |
| 28 | #include <linux/module.h> | |
| 29 | #include <linux/blkdev.h> | |
| 30 | ||
| 31 | MODULE_LICENSE("$ZFS_META_LICENSE"); | |
| 32 | ],[ | |
| 33 | struct request_queue *q = NULL; | |
| 34 | (void) blk_queue_flush(q, REQ_FLUSH); | |
| 35 | ],[ | |
| 36 | AC_MSG_RESULT(no) | |
| 37 | ],[ | |
| 38 | AC_MSG_RESULT(yes) | |
| 39 | AC_DEFINE(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY, 1, | |
| 40 | [blk_queue_flush() is GPL-only]) | |
| 41 | ]) | |
| b18019d2 ED |
42 | ],[ |
| 43 | AC_MSG_RESULT(no) | |
| 44 | ]) | |
| 45 | ||
| 87dac73d AX |
46 | dnl # |
| 47 | dnl # 4.7 API change | |
| 48 | dnl # Replace blk_queue_flush with blk_queue_write_cache | |
| 49 | dnl # | |
| 50 | AC_MSG_CHECKING([whether blk_queue_write_cache() exists]) | |
| b18019d2 | 51 | ZFS_LINUX_TRY_COMPILE([ |
| 87dac73d | 52 | #include <linux/kernel.h> |
| b18019d2 ED |
53 | #include <linux/blkdev.h> |
| 54 | ||
| b18019d2 ED |
55 | ],[ |
| 56 | struct request_queue *q = NULL; | |
| 87dac73d | 57 | blk_queue_write_cache(q, true, true); |
| b18019d2 ED |
58 | ],[ |
| 59 | AC_MSG_RESULT(yes) | |
| 87dac73d AX |
60 | AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE, 1, |
| 61 | [blk_queue_write_cache() exists]) | |
| 62 | ||
| 63 | AC_MSG_CHECKING([whether blk_queue_write_cache() is GPL-only]) | |
| 64 | ZFS_LINUX_TRY_COMPILE([ | |
| 65 | #include <linux/kernel.h> | |
| 66 | #include <linux/module.h> | |
| 67 | #include <linux/blkdev.h> | |
| 68 | ||
| 69 | MODULE_LICENSE("$ZFS_META_LICENSE"); | |
| 70 | ],[ | |
| 71 | struct request_queue *q = NULL; | |
| 72 | blk_queue_write_cache(q, true, true); | |
| 73 | ],[ | |
| 74 | AC_MSG_RESULT(no) | |
| 75 | ],[ | |
| 76 | AC_MSG_RESULT(yes) | |
| 77 | AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY, 1, | |
| 78 | [blk_queue_write_cache() is GPL-only]) | |
| 79 | ]) | |
| 80 | ],[ | |
| 81 | AC_MSG_RESULT(no) | |
| b18019d2 | 82 | ]) |
| 87dac73d | 83 | |
| b18019d2 ED |
84 | EXTRA_KCFLAGS="$tmp_flags" |
| 85 | ]) |