26 lines
794 B
Plaintext
26 lines
794 B
Plaintext
dnl #
|
|
dnl # 2.6.30 API change
|
|
dnl # The blk_queue_physical_block_size() function was introduced to
|
|
dnl # indicate the smallest I/O the device can write without incurring
|
|
dnl # a read-modify-write penalty.
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE], [
|
|
AC_MSG_CHECKING([whether blk_queue_physical_block_size() is available])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
|
|
ZFS_LINUX_TRY_COMPILE([
|
|
#include <linux/blkdev.h>
|
|
],[
|
|
struct request_queue *q = NULL;
|
|
unsigned short block_size = 1;
|
|
(void) blk_queue_physical_block_size(q, block_size);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_BLK_QUEUE_PHYSICAL_BLOCK_SIZE, 1,
|
|
[blk_queue_physical_block_size() is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|