[xen staging] libs/evtchn: fix build on NetBSD

[patchbot@xxxxxxx]

commit 3a0b215c6f69c3a73d3ea9591823cb28c4a84dea
Author:     From: Manuel Bouyer <bouyer@xxxxxxxxxx>
AuthorDate: Mon Jan 18 18:38:41 2021 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Mon Jan 18 18:58:20 2021 +0000

    libs/evtchn: fix build on NetBSD
    
    Use xenio3.h for ioctl definitions
    
    read_exact/write_exact seems to not be available here, which cause a gcc
    error.  Use plain read/write, the xenevtchn interface won't do partial
    read/write on NetBSD anyway so it should be safe.  This is in line with the
    rest of the OS specific helpers.
    
    Fixes: b7f76a699dc ('tools: Refactor /dev/xen/evtchn wrappers into 
libxenevtchn')
    Signed-off-by: Manuel Bouyer <bouyer@xxxxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 tools/libs/evtchn/netbsd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/libs/evtchn/netbsd.c b/tools/libs/evtchn/netbsd.c
index 60a9235978..1cebc21ffc 100644
--- a/tools/libs/evtchn/netbsd.c
+++ b/tools/libs/evtchn/netbsd.c
@@ -25,10 +25,10 @@
 
 #include <sys/ioctl.h>
 
-#include <xen/sys/evtchn.h>
-
 #include "private.h"
 
+#include <xen/xenio3.h>
+
 #define EVTCHN_DEV_NAME  "/dev/xenevt"
 
 int osdep_evtchn_open(xenevtchn_handle *xce, unsigned int flags)
@@ -138,7 +138,7 @@ xenevtchn_port_or_error_t 
xenevtchn_pending(xenevtchn_handle *xce)
     int fd = xce->fd;
     evtchn_port_t port;
 
-    if ( read_exact(fd, (char *)&port, sizeof(port)) == -1 )
+    if ( read(fd, (char *)&port, sizeof(port)) == -1 )
         return -1;
 
     return port;
@@ -148,7 +148,7 @@ int xenevtchn_unmask(xenevtchn_handle *xce, evtchn_port_t 
port)
 {
     int fd = xce->fd;
 
-    return write_exact(fd, (char *)&port, sizeof(port));
+    return write(fd, (char *)&port, sizeof(port));
 }
 
 /*
--
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