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Diffstat (limited to 'config/kernel-blk-queue-max-segments.m4')
| -rw-r--r-- | config/kernel-blk-queue-max-segments.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/config/kernel-blk-queue-max-segments.m4 b/config/kernel-blk-queue-max-segments.m4 new file mode 100644 index 000000000..09be121ed --- /dev/null +++ b/config/kernel-blk-queue-max-segments.m4 @@ -0,0 +1,23 @@ +dnl # +dnl # 2.6.34 API change +dnl # blk_queue_max_segments() consolidates blk_queue_max_hw_segments() +dnl # and blk_queue_max_phys_segments(). +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS], [ + AC_MSG_CHECKING([whether blk_queue_max_segments() is available]) + tmp_flags="$EXTRA_KCFLAGS" + EXTRA_KCFLAGS="-Wno-unused-but-set-variable" + ZFS_LINUX_TRY_COMPILE([ + #include <linux/blkdev.h> + ],[ + struct request_queue *q = NULL; + (void) blk_queue_max_segments(q, BLK_MAX_SEGMENTS); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLK_QUEUE_MAX_SEGMENTS, 1, + [blk_queue_max_segments() is available]) + ],[ + AC_MSG_RESULT(no) + ]) + EXTRA_KCFLAGS="$tmp_flags" +]) |