FreeBSD: get_zfs_ioctl_version() should be cast to (void)

FreeBSD's Coverity scans complain that we ignore the return value. There
is no need to check the return value so we cast it to (void) to suppress
further complaints by static analyzers.

Reported-by: Coverity (CID 1018175)
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: szubersk <szuberskidamian@gmail.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14136

diff --git a/lib/libzfs_core/os/freebsd/libzfs_core_ioctl.c b/lib/libzfs_core/os/freebsd/libzfs_core_ioctl.c
index 72f8f393039ab8e95007a778ad6d919caeae9a7b..76778b36521cda1c3f4705af8621aa2b56cfbad0 100644 (file)
--- a/lib/libzfs_core/os/freebsd/libzfs_core_ioctl.c
+++ b/lib/libzfs_core/os/freebsd/libzfs_core_ioctl.c
@@ -38,7 +38,7 @@ get_zfs_ioctl_version(void)
        int ver = ZFS_IOCVER_NONE;
 
        ver_size = sizeof (ver);
-       sysctlbyname("vfs.zfs.version.ioctl", &ver, &ver_size, NULL, 0);
+       (void) sysctlbyname("vfs.zfs.version.ioctl", &ver, &ver_size, NULL, 0);
 
        return (ver);
 }