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Commit | Line | Data |
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c9c0d073 BB |
1 | dnl # |
2 | dnl # 2.6.24 API change | |
3 | dnl # Empty write barriers are now supported and we should use them. | |
4 | dnl # | |
5 | AC_DEFUN([ZFS_AC_KERNEL_BIO_EMPTY_BARRIER], [ | |
6 | AC_MSG_CHECKING([whether bio_empty_barrier() is defined]) | |
7 | EXTRA_KCFLAGS="-Werror" | |
8 | ZFS_LINUX_TRY_COMPILE([ | |
9 | #include <linux/bio.h> | |
10 | ],[ | |
11 | struct bio bio; | |
12 | (void)bio_empty_barrier(&bio); | |
13 | ],[ | |
14 | AC_MSG_RESULT(yes) | |
15 | AC_DEFINE(HAVE_BIO_EMPTY_BARRIER, 1, | |
16 | [bio_empy_barrier() is defined]) | |
17 | ],[ | |
18 | AC_MSG_RESULT(no) | |
19 | ]) | |
20 | ]) |