diff options
| author | Brian Behlendorf <[email protected]> | 2010-08-26 11:22:58 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2010-08-31 13:41:27 -0700 |
| commit | c9c0d073da561bcbefbdf09c87fc75b227415619 (patch) | |
| tree | 7daee55ae61526107f421de48171573fa5a15d28 /config/kernel-bio-empty-barrier.m4 | |
| parent | 40b84e7aec6392187722e61e5a4a853b530bf60f (diff) | |
Add build system
Add autoconf style build infrastructure to the ZFS tree. This
includes autogen.sh, configure.ac, m4 macros, some scripts/*,
and makefiles for all the core ZFS components.
Diffstat (limited to 'config/kernel-bio-empty-barrier.m4')
| -rw-r--r-- | config/kernel-bio-empty-barrier.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/config/kernel-bio-empty-barrier.m4 b/config/kernel-bio-empty-barrier.m4 new file mode 100644 index 000000000..99549fe24 --- /dev/null +++ b/config/kernel-bio-empty-barrier.m4 @@ -0,0 +1,20 @@ +dnl # +dnl # 2.6.24 API change +dnl # Empty write barriers are now supported and we should use them. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BIO_EMPTY_BARRIER], [ + AC_MSG_CHECKING([whether bio_empty_barrier() is defined]) + EXTRA_KCFLAGS="-Werror" + ZFS_LINUX_TRY_COMPILE([ + #include <linux/bio.h> + ],[ + struct bio bio; + (void)bio_empty_barrier(&bio); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BIO_EMPTY_BARRIER, 1, + [bio_empy_barrier() is defined]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |