| Message ID | 20251216211817.4131167-3-sjg@u-boot.org |
|---|---|
| State | New |
| Headers |
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Tue, 16 Dec 2025 14:18:33 -0700 (MST) From: Simon Glass <sjg@u-boot.org> To: U-Boot Concept <concept@u-boot.org> Date: Tue, 16 Dec 2025 14:18:03 -0700 Message-ID: <20251216211817.4131167-3-sjg@u-boot.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251216211817.4131167-1-sjg@u-boot.org> References: <20251216211817.4131167-1-sjg@u-boot.org> MIME-Version: 1.0 Message-ID-Hash: FJHM5RBGB7ZETZYHZQZNNSNY6BRE7T55 X-Message-ID-Hash: FJHM5RBGB7ZETZYHZQZNNSNY6BRE7T55 X-MailFrom: sjg@u-boot.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Simon Glass <simon.glass@canonical.com>, "Claude Opus 4 . 5" <noreply@anthropic.com> X-Mailman-Version: 3.3.10 Precedence: list Subject: [Concept] [PATCH 02/11] ext4l: Provide sizeof_field() in linux/stddef.h List-Id: Discussion and patches related to U-Boot Concept <concept.u-boot.org> Archived-At: <https://lists.u-boot.org/archives/list/concept@u-boot.org/message/FJHM5RBGB7ZETZYHZQZNNSNY6BRE7T55/> List-Archive: <https://lists.u-boot.org/archives/list/concept@u-boot.org/> List-Help: <mailto:concept-request@u-boot.org?subject=help> List-Owner: <mailto:concept-owner@u-boot.org> List-Post: <mailto:concept@u-boot.org> List-Subscribe: <mailto:concept-join@u-boot.org> List-Unsubscribe: <mailto:concept-leave@u-boot.org> Content-Type: text/plain; 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| Series |
ext4l: Add Linux compatibility headers
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Commit Message
Simon Glass
Dec. 16, 2025, 9:18 p.m. UTC
From: Simon Glass <simon.glass@canonical.com> Add the sizeof_field() macro which returns the size of a struct field. This is used by Linux kernel code including ext4. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com> --- include/linux/stddef.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/stddef.h b/include/linux/stddef.h index c732eef65ac..deeffc96360 100644 --- a/include/linux/stddef.h +++ b/include/linux/stddef.h @@ -17,4 +17,12 @@ #undef offsetof #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER) +/** + * 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)) + #endif