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Wed, 15 Jan 2025 06:14:19 -0500 (EST) From: Celeste Liu Date: Wed, 15 Jan 2025 19:13:28 +0800 Subject: [PATCH v6 2/3] tools: copy include/linux/stddef.h to tools/include Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250115-riscv-new-regset-v6-2-59bfddd33525@coelacanthus.name> References: <20250115-riscv-new-regset-v6-0-59bfddd33525@coelacanthus.name> In-Reply-To: <20250115-riscv-new-regset-v6-0-59bfddd33525@coelacanthus.name> To: Oleg Nesterov , Paul Walmsley , Palmer Dabbelt , Eric Biederman , Kees Cook , Shuah Khan , Albert Ou Cc: Alexandre Ghiti , "Dmitry V. Levin" , Andrea Bolognani , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Thomas Gleixner , Ron Economos , Charlie Jenkins , Andrew Jones , Quan Zhou , Felix Yan , Ruizhe Pan , Guo Ren , Yao Zi , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Celeste Liu X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=4577; i=uwu@coelacanthus.name; h=from:subject:message-id; bh=WV0NqvqtTK1mWkN78Oo6GA0cv0m8xWUUF/b/ZrqzqEo=; b=owJ4nJvAy8zAJeafov85RWVtBeNptSSG9PYZFdHJnxQvWgTnrrt4QWqTwV/zbd1fOHm+8piqL H7LlzfPIKCjlIVBjItBVkyRJa+E5SfnpbPdezu2d8HMYWUCGcLAxSkAE6ncz8iw/93V6o+mZ8wn SyYeMDt4u+nxizae6PPGbtsbv/s84zRlZPif1tGg3LzHjPPH7vwT/EXzzTbECkmeEP4343DKkhA j9i9cANkLSSY= X-Developer-Key: i=uwu@coelacanthus.name; a=openpgp; fpr=892EBC7DC392DFF9C9C03F1D15F4180E73787863 Some macro defined in stddef.h are useful and have been used in many code in selftests. Copy them to tools/include so developers needn't create their copy in every files. Remove some definitions like NULL and true/false to be suitable to non-kernel environment. Signed-off-by: Celeste Liu Reviewed-by: Andrew Jones --- tools/include/linux/stddef.h | 85 +++++++++++++++++++++++++++++++++++++++ tools/include/uapi/linux/stddef.h | 6 +-- 2 files changed, 87 insertions(+), 4 deletions(-) diff --git a/tools/include/linux/stddef.h b/tools/include/linux/stddef.h new file mode 100644 index 0000000000000000000000000000000000000000..55f3964d9a3d9f9f9345a75248eec027c56faef9 --- /dev/null +++ b/tools/include/linux/stddef.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_STDDEF_H +#define _LINUX_STDDEF_H + +#include + +/** + * sizeof_field() - Report the size of a struct field in bytes + * + * @TYPE: The structure containing the field of interest + * @MEMBER: The field to return the size of + */ +#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER)) + +/** + * offsetofend() - Report the offset of a struct field within the struct + * + * @TYPE: The type of the structure + * @MEMBER: The member within the structure to get the end offset of + */ +#define offsetofend(TYPE, MEMBER) \ + (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER)) + +/** + * struct_group() - Wrap a set of declarations in a mirrored struct + * + * @NAME: The identifier name of the mirrored sub-struct + * @MEMBERS: The member declarations for the mirrored structs + * + * Used to create an anonymous union of two structs with identical + * layout and size: one anonymous and one named. The former can be + * used normally without sub-struct naming, and the latter can be + * used to reason about the start, end, and size of the group of + * struct members. + */ +#define struct_group(NAME, MEMBERS...) \ + __struct_group(/* no tag */, NAME, /* no attrs */, MEMBERS) + +/** + * struct_group_attr() - Create a struct_group() with trailing attributes + * + * @NAME: The identifier name of the mirrored sub-struct + * @ATTRS: Any struct attributes to apply + * @MEMBERS: The member declarations for the mirrored structs + * + * Used to create an anonymous union of two structs with identical + * layout and size: one anonymous and one named. The former can be + * used normally without sub-struct naming, and the latter can be + * used to reason about the start, end, and size of the group of + * struct members. Includes structure attributes argument. + */ +#define struct_group_attr(NAME, ATTRS, MEMBERS...) \ + __struct_group(/* no tag */, NAME, ATTRS, MEMBERS) + +/** + * struct_group_tagged() - Create a struct_group with a reusable tag + * + * @TAG: The tag name for the named sub-struct + * @NAME: The identifier name of the mirrored sub-struct + * @MEMBERS: The member declarations for the mirrored structs + * + * Used to create an anonymous union of two structs with identical + * layout and size: one anonymous and one named. The former can be + * used normally without sub-struct naming, and the latter can be + * used to reason about the start, end, and size of the group of + * struct members. Includes struct tag argument for the named copy, + * so the specified layout can be reused later. + */ +#define struct_group_tagged(TAG, NAME, MEMBERS...) \ + __struct_group(TAG, NAME, /* no attrs */, MEMBERS) + +/** + * DECLARE_FLEX_ARRAY() - Declare a flexible array usable in a union + * + * @TYPE: The type of each flexible array element + * @NAME: The name of the flexible array member + * + * In order to have a flexible array member in a union or alone in a + * struct, it needs to be wrapped in an anonymous struct with at least 1 + * named member, but that member can be empty. + */ +#define DECLARE_FLEX_ARRAY(TYPE, NAME) \ + __DECLARE_FLEX_ARRAY(TYPE, NAME) + +#endif diff --git a/tools/include/uapi/linux/stddef.h b/tools/include/uapi/linux/stddef.h index bb6ea517efb51177a7983fadad9b590b12b786e5..f2548fd95f6e1d8cb218d52918bb81a3317d10b1 100644 --- a/tools/include/uapi/linux/stddef.h +++ b/tools/include/uapi/linux/stddef.h @@ -1,8 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -#ifndef _LINUX_STDDEF_H -#define _LINUX_STDDEF_H - - +#ifndef _UAPI_LINUX_STDDEF_H +#define _UAPI_LINUX_STDDEF_H #ifndef __always_inline #define __always_inline __inline__