This backports sizeof_field() from upstream Linux commit 4229a470175b
("stddef.h: Introduce sizeof_field()"). This is now used by multiple
drivers.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/stddef.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/backport/backport-include/linux/stddef.h b/backport/backport-include/linux/stddef.h
index 2c836b00..a6cdc67d 100644
--- a/backport/backport-include/linux/stddef.h
+++ b/backport/backport-include/linux/stddef.h
@@ -2,6 +2,16 @@
#define __BACKPORT_LINUX_STDDEF_H
#include_next <linux/stddef.h>
+#ifndef sizeof_field
+/**
+ * sizeof_field(TYPE, MEMBER)
+ *
+ * @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
+
#ifndef offsetofend
/**
* offsetofend(TYPE, MEMBER)
@@ -10,7 +20,7 @@
* @MEMBER: The member within the structure to get the end offset of
*/
#define offsetofend(TYPE, MEMBER) \
- (offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER))
+ (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
#endif
#endif /* __BACKPORT_LINUX_STDDEF_H */
--
2.20.1
--
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