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Diffstat (limited to 'config/kernel-blk-queue-bdi.m4')
| -rw-r--r-- | config/kernel-blk-queue-bdi.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/config/kernel-blk-queue-bdi.m4 b/config/kernel-blk-queue-bdi.m4 new file mode 100644 index 000000000..816471166 --- /dev/null +++ b/config/kernel-blk-queue-bdi.m4 @@ -0,0 +1,20 @@ +dnl # +dnl # 2.6.32 - 4.11, statically allocated bdi in request_queue +dnl # 4.12 - x.y, dynamically allocated bdi in request_queue +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_BDI], [ + AC_MSG_CHECKING([whether blk_queue bdi is dynamic]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/blkdev.h> + ],[ + struct request_queue q; + struct backing_dev_info bdi; + q.backing_dev_info = &bdi; + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLK_QUEUE_BDI_DYNAMIC, 1, + [blk queue backing_dev_info is dynamic]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |