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d177712e CIK |
1 | dnl # |
2 | dnl # 2.6.32-2.6.35 API - The BIO_RW_UNPLUG enum can be used as a hint | |
3 | dnl # to unplug the queue. | |
4 | dnl # | |
5 | AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BIO_RW_UNPLUG], [ | |
6 | AC_MSG_CHECKING([whether the BIO_RW_UNPLUG enum is available]) | |
7 | tmp_flags="$EXTRA_KCFLAGS" | |
8 | EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}" | |
9 | ZFS_LINUX_TRY_COMPILE([ | |
10 | #include <linux/blkdev.h> | |
11 | ],[ | |
12 | extern enum bio_rw_flags rw; | |
13 | ||
14 | rw = BIO_RW_UNPLUG; | |
15 | ],[ | |
16 | AC_MSG_RESULT(yes) | |
17 | AC_DEFINE(HAVE_BLK_QUEUE_HAVE_BIO_RW_UNPLUG, 1, | |
18 | [BIO_RW_UNPLUG is available]) | |
19 | ],[ | |
20 | AC_MSG_RESULT(no) | |
21 | ]) | |
22 | EXTRA_KCFLAGS="$tmp_flags" | |
23 | ]) | |
24 | ||
25 | AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BLK_PLUG], [ | |
26 | AC_MSG_CHECKING([whether struct blk_plug is available]) | |
27 | tmp_flags="$EXTRA_KCFLAGS" | |
28 | EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}" | |
29 | ZFS_LINUX_TRY_COMPILE([ | |
30 | #include <linux/blkdev.h> | |
31 | ],[ | |
32 | struct blk_plug plug; | |
33 | ||
34 | blk_start_plug(&plug); | |
35 | blk_finish_plug(&plug); | |
36 | ],[ | |
37 | AC_MSG_RESULT(yes) | |
38 | AC_DEFINE(HAVE_BLK_QUEUE_HAVE_BLK_PLUG, 1, | |
39 | [struct blk_plug is available]) | |
40 | ],[ | |
41 | AC_MSG_RESULT(no) | |
42 | ]) | |
43 | EXTRA_KCFLAGS="$tmp_flags" | |
44 | ]) |