[xen stable-4.17] libs/vchan: Fix -Wsingle-bit-bitfield-constant-conversion

[patchbot@xxxxxxx]

commit 38306739f6c48d76a33c510cdabee78ec1f1138d
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Tue Aug 8 14:53:42 2023 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Aug 8 14:57:49 2023 +0100

    libs/vchan: Fix -Wsingle-bit-bitfield-constant-conversion
    
    Gitlab reports:
    
      init.c:348:18: error: implicit truncation from 'int' to a one-bit wide 
bit-field changes value from 1 to -1 
[-Werror,-Wsingle-bit-bitfield-constant-conversion]
              ctrl->is_server = 1;
                              ^ ~
      1 error generated.
      make[6]: *** 
[/builds/xen-project/people/andyhhp/xen/tools/libs/vchan/../../../tools/Rules.mk:188:
 init.o] Error 1
    
    In Xen 4.18, this was fixed with c/s 99ab02f63ea8 ("tools: convert bitfields
    to unsigned type") but this is an ABI change which can't be backported.
    
    Swich 1 for -1 to provide a minimally invasive way to fix the build.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libs/vchan/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libs/vchan/init.c b/tools/libs/vchan/init.c
index 9195bd3b98..b3de8f96fe 100644
--- a/tools/libs/vchan/init.c
+++ b/tools/libs/vchan/init.c
@@ -345,7 +345,7 @@ struct libxenvchan *libxenvchan_server_init(struct 
xentoollog_logger *logger,
 
        ctrl->ring = NULL;
        ctrl->event = NULL;
-       ctrl->is_server = 1;
+       ctrl->is_server = -1;
        ctrl->server_persist = 0;
 
        ctrl->read.order = min_order(left_min);
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.17