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Linux 2.6.31 logical block size compatibility. 

Autoconf check for bdev_logical_block_size() helper which replaced
bdev_hardsect_size() as the correct way to get the sector size.
This commit is contained in:
Brian Behlendorf 2009-11-12 12:49:01 -08:00
parent a75cfcd5eb
commit 9ee04032de
2 changed files with 23 additions and 0 deletions
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22
config/kernel-bdev-logical-size.m4 Normal file
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@ -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)
])
])

1
config/kernel.m4
View File

@ -6,6 +6,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_SPL
ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
ZFS_AC_KERNEL_BIO_RW_SYNCIO
ZFS_AC_KERNEL_BIO_EMPTY_BARRIER