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xen: register legacy backends via xen_backend_init

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It is okay to register legacy backends in the middle of xen_bus_init().
All that the registration does is record the existence of the backend
in xenstore.

This makes it possible to remove them from the build without introducing
undefined symbols in xen_be_init().  It also removes the need for the
backend_register callback, whose only purpose is to avoid registering
nonfunctional backends.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240509170044.190795-8-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-05-09 19:00:38 +02:00
parent 0973996fe4
commit 88f5ed7017
6 changed files with 20 additions and 41 deletions
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1
include/hw/xen/xen_pvdev.h
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@ -29,7 +29,6 @@ struct XenDevOps {
const char *node);
void (*frontend_changed)(struct XenLegacyDevice *xendev,
const char *node);
int (*backend_register)(void);
};
struct XenLegacyDevice {