diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/kernel-blk-queue-unplug.m4 | 23 | ||||
| -rw-r--r-- | config/kernel.m4 | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/config/kernel-blk-queue-unplug.m4 b/config/kernel-blk-queue-unplug.m4 new file mode 100644 index 000000000..45cc2322a --- /dev/null +++ b/config/kernel-blk-queue-unplug.m4 @@ -0,0 +1,23 @@ +dnl # +dnl # 2.6.32-2.6.35 API - The BIO_RW_UNPLUG enum can be used as a hint +dnl # to unplug the queue. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BIO_RW_UNPLUG], [ + AC_MSG_CHECKING([whether the BIO_RW_UNPLUG enum is available]) + tmp_flags="$EXTRA_KCFLAGS" + EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}" + ZFS_LINUX_TRY_COMPILE([ + #include <linux/blkdev.h> + ],[ + extern enum bio_rw_flags rw; + + rw = BIO_RW_UNPLUG; + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLK_QUEUE_HAVE_BIO_RW_UNPLUG, 1, + [BIO_RW_UNPLUG is available]) + ],[ + AC_MSG_RESULT(no) + ]) + EXTRA_KCFLAGS="$tmp_flags" +]) diff --git a/config/kernel.m4 b/config/kernel.m4 index c9b24cbe8..ac6c08ffe 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -27,6 +27,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [ ZFS_AC_KERNEL_BLK_QUEUE_FLUSH ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS + ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BIO_RW_UNPLUG ZFS_AC_KERNEL_GET_DISK_RO ZFS_AC_KERNEL_GET_GENDISK ZFS_AC_KERNEL_DISCARD_GRANULARITY |