95ebea5a15
commit 55037ed7bdc62151a726f5685f88afa6a82959b1 upstream. Add include guard wrapper define to uapi/linux/stddef.h to prevent macro redefinition errors when stddef.h is included more than once. This was not needed before since the only contents already used a redefinition test. Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org> Link: https://lore.kernel.org/r/20220329171252.57279-1-tadeusz.struk@linaro.org Fixes: 50d7bd38c3aa ("stddef: Introduce struct_group() helper macro") Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_STDDEF_H
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#define _UAPI_LINUX_STDDEF_H
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#include <linux/compiler_types.h>
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#ifndef __always_inline
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#define __always_inline inline
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#endif
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/**
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* __struct_group() - Create a mirrored named and anonyomous struct
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*
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* @TAG: The tag name for the named sub-struct (usually empty)
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* @NAME: The identifier name of the mirrored sub-struct
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* @ATTRS: Any struct attributes (usually empty)
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* @MEMBERS: The member declarations for the mirrored structs
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*
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* Used to create an anonymous union of two structs with identical layout
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* and size: one anonymous and one named. The former's members can be used
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* normally without sub-struct naming, and the latter can be used to
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* reason about the start, end, and size of the group of struct members.
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* The named struct can also be explicitly tagged for layer reuse, as well
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* as both having struct attributes appended.
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*/
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#define __struct_group(TAG, NAME, ATTRS, MEMBERS...) \
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union { \
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struct { MEMBERS } ATTRS; \
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struct TAG { MEMBERS } ATTRS NAME; \
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}
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#endif
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