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| author | Roger Pau Monne <roger.pau@entel.upc.edu> | 2012-01-19 11:21:10 +0100 |
|---|---|---|
| committer | Roger Pau Monne <roger.pau@entel.upc.edu> | 2012-01-19 11:21:10 +0100 |
| commit | b21046d2eaad49c6e943c1618ba07a9b7da9cd0d (patch) | |
| tree | fd863a9ffb18258a1283939922b7407ef00df20a /tools/libxc/xc_netbsd.c | |
| parent | 089179f6f330d820234780ebaeb79614f4d2d9ba (diff) | |
| download | xen-b21046d2eaad49c6e943c1618ba07a9b7da9cd0d.tar.gz xen-b21046d2eaad49c6e943c1618ba07a9b7da9cd0d.tar.bz2 xen-b21046d2eaad49c6e943c1618ba07a9b7da9cd0d.zip | |
libxc: add comment to why NetBSD return hypercall->retval
Added a comment that explains why NetBSD return hypercall->retval on
success.
Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>
Acked-by: Ian Campbell <ian.campbell.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Reported-by: Olaf Hering <olaf@aepfle.de>
Diffstat (limited to 'tools/libxc/xc_netbsd.c')
| -rw-r--r-- | tools/libxc/xc_netbsd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/libxc/xc_netbsd.c b/tools/libxc/xc_netbsd.c index 9782a3423a..b6d67bbb8c 100644 --- a/tools/libxc/xc_netbsd.c +++ b/tools/libxc/xc_netbsd.c @@ -96,6 +96,12 @@ static int netbsd_privcmd_hypercall(xc_interface *xch, xc_osdep_handle h, privcm int fd = (int)h; int error = ioctl(fd, IOCTL_PRIVCMD_HYPERCALL, hypercall); + /* + * Since NetBSD ioctl can only return 0 on success or < 0 on + * error, if we want to return a value from ioctl we should + * do so by setting hypercall->retval, to mimic Linux ioctl + * implementation. + */ if (error < 0) return -errno; else |