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Juergen Gross
93d913c6e6
Flexible arrays in public headers can be problematic with some compilers. With XEN_FLEX_ARRAY_DIM there is a mechanism available to deal with this issue, but care must be taken to not change the affected structs in an incompatible way. So bump __XEN_LATEST_INTERFACE_VERSION__ and introduce a new macro XENPV_FLEX_ARRAY_DIM which will be XENPV_FLEX_ARRAY_DIM with the interface version being new enough and "1" (the value used today in the affected headers) when the interface version is an old one. Replace the arr[1] instances (this includes the ones seen to be problematic in recent Linux kernels [1]) with arr[XENPV_FLEX_ARRAY_DIM] in order to avoid compilation errors. [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217693 Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Henry Wang <Henry.Wang@arm.com> # CHANGELOG Reviewed-by: Jan Beulich <jbeulich@suse.com> Acked-by: Julien Grall <jgrall@amazon.com>
30 lines
958 B
C
30 lines
958 B
C
/* SPDX-License-Identifier: MIT */
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/******************************************************************************
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* xen-compat.h
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*
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* Guest OS interface to Xen. Compatibility layer.
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*
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* Copyright (c) 2006, Christian Limpach
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*/
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#ifndef __XEN_PUBLIC_XEN_COMPAT_H__
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#define __XEN_PUBLIC_XEN_COMPAT_H__
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#define __XEN_LATEST_INTERFACE_VERSION__ 0x00041300
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#if defined(__XEN__) || defined(__XEN_TOOLS__)
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/* Xen is built with matching headers and implements the latest interface. */
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#define __XEN_INTERFACE_VERSION__ __XEN_LATEST_INTERFACE_VERSION__
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#elif !defined(__XEN_INTERFACE_VERSION__)
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/* Guests which do not specify a version get the legacy interface. */
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#define __XEN_INTERFACE_VERSION__ 0x00000000
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#endif
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#if __XEN_INTERFACE_VERSION__ > __XEN_LATEST_INTERFACE_VERSION__
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#error "These header files do not support the requested interface version."
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#endif
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#define COMPAT_FLEX_ARRAY_DIM XEN_FLEX_ARRAY_DIM
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#endif /* __XEN_PUBLIC_XEN_COMPAT_H__ */
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