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e0c92f0f9e
The same macros are redefined in three places, so move them to a common file to reduce duplication and make it easier to reuse them. Signed-off-by: Alexandru Dadu <alexandru.dadu@imgtec.com> Co-developed-by: Alessio Belle <alessio.belle@imgtec.com> Reviewed-by: Brajesh Gupta <brajesh.gupta@imgtec.com> Link: https://patch.msgid.link/20260729-fwif-checks-updates-v1-1-af65e9606a7e@imgtec.com Signed-off-by: Alessio Belle <alessio.belle@imgtec.com>
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
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/* Copyright (c) 2026 Imagination Technologies Ltd. */
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#ifndef PVR_CHECK_H
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#define PVR_CHECK_H
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#include <linux/build_bug.h>
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#include <linux/overflow.h>
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#include <linux/stddef.h>
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#define OFFSET_CHECK(type, member, offset) \
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static_assert(offsetof(type, member) == (offset), \
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"offsetof(" #type ", " #member ") incorrect")
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#define SIZE_CHECK(type, size) \
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static_assert(sizeof(type) == (size), #type " is incorrect size")
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#define ALIGN_CHECK(type, align) \
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static_assert(__alignof__(type) <= (align), #type " has incorrect alignment")
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/*
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* Where the last member of a struct is a flexible array member, using
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* SIZE_CHECK() is pointless. If the structure is not already padded to
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* alignment without the flexible array member, sizeof() will not match the
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* offset of the flexible array member and the "correct" sizeof() value is
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* completely meaningless.
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*
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* In those instances, use FLEX_ARRAY_CHECK() instead to assert that the final
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* field is a flexible array member and that it behaves as expected.
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*/
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#define FLEX_ARRAY_CHECK(type, member) \
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static_assert(flex_array_size((type *)NULL, member, 1) == \
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sizeof_field(type, member[0]), \
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#type "->" #member " is incorrect size")
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#endif /* PVR_CHECK_H */
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