Fix gcc configure warnings

[zfs.git] / config / kernel-bio-failfast.m4

diff --git a/config/kernel-bio-failfast.m4 b/config/kernel-bio-failfast.m4
index c45175b..6b9a526 100644 (file)
--- a/config/kernel-bio-failfast.m4
+++ b/config/kernel-bio-failfast.m4
@@ -9,7 +9,7 @@ AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST], [
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/bio.h>
        ],[
-               int flags;
+               int flags __attribute__ ((unused));
                flags = (1 << BIO_RW_FAILFAST);
        ],[
                AC_MSG_RESULT(yes)
@@ -25,7 +25,7 @@ AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST_DTD], [
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/bio.h>
        ],[
-               int flags;
+               int flags __attribute__ ((unused));
                flags = ((1 << BIO_RW_FAILFAST_DEV) |
                         (1 << BIO_RW_FAILFAST_TRANSPORT) |
                         (1 << BIO_RW_FAILFAST_DRIVER));
@@ -43,7 +43,7 @@ AC_DEFUN([ZFS_AC_KERNEL_REQ_FAILFAST_MASK], [
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/bio.h>
        ],[
-               int flags;
+               int flags __attribute__ ((unused));
                flags = REQ_FAILFAST_MASK;
        ],[
                AC_MSG_RESULT(yes)