[xen master] tools/libs/vchan: remove private offsetof() definition

[patchbot@xxxxxxx]

commit 809882cb34c8f275c8901c62b5cb1f62b86048d8
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Fri Mar 24 11:14:25 2023 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Mar 24 11:14:25 2023 +0100

    tools/libs/vchan: remove private offsetof() definition
    
    vchan/init.c is defining offsetof privately. Remove that definition
    and just use stddef.h instead.
    
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libs/vchan/init.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/libs/vchan/init.c b/tools/libs/vchan/init.c
index 021e1f29e1..a081dd4c9a 100644
--- a/tools/libs/vchan/init.c
+++ b/tools/libs/vchan/init.c
@@ -32,6 +32,7 @@
 #include <sys/mman.h>
 #include <sys/ioctl.h>
 #include <sys/user.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
@@ -69,10 +70,6 @@
 #define MAX_RING_SHIFT 20
 #define MAX_RING_SIZE (1 << MAX_RING_SHIFT)
 
-#ifndef offsetof
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#endif
-
 static int init_gnt_srv(struct libxenvchan *ctrl, int domain)
 {
        int pages_left = ctrl->read.order >= PAGE_SHIFT ? 1 << 
(ctrl->read.order - PAGE_SHIFT) : 0;
--
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