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Diffstat (limited to 'config/kernel-bdev-logical-size.m4')
| -rw-r--r-- | config/kernel-bdev-logical-size.m4 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/config/kernel-bdev-logical-size.m4 b/config/kernel-bdev-logical-size.m4 new file mode 100644 index 000000000..1e199663b --- /dev/null +++ b/config/kernel-bdev-logical-size.m4 @@ -0,0 +1,22 @@ +dnl # +dnl # 2.6.30 API change +dnl # bdev_hardsect_size() replaced with bdev_logical_block_size(). While +dnl # it has been true for a while that there was no strict 1:1 mapping +dnl # between physical sector size and logical block size this change makes +dnl # it explicit. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [ + AC_MSG_CHECKING([whether bdev_logical_block_size() is available]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/blkdev.h> + ],[ + struct block_device *bdev = NULL; + bdev_logical_block_size(bdev); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BDEV_LOGICAL_BLOCK_SIZE, 1, + [bdev_logical_block_size() is available]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |