From: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
backport/backport-include/linux/string.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/backport/backport-include/linux/string.h b/backport/backport-include/linux/string.h
index 39257e5f66ab..dc29dcf72b24 100644
--- a/backport/backport-include/linux/string.h
+++ b/backport/backport-include/linux/string.h
@@ -12,4 +12,24 @@ extern void *memdup_user_nul(const void __user *, size_t);
int match_string(const char * const *array, size_t n, const char *string);
#endif /* LINUX_VERSION_IS_LESS(4,5,0) */
+#ifndef memset_after
+#define memset_after(obj, v, member) \
+({ \
+ u8 *__ptr = (u8 *)(obj); \
+ typeof(v) __val = (v); \
+ memset(__ptr + offsetofend(typeof(*(obj)), member), __val, \
+ sizeof(*(obj)) - offsetofend(typeof(*(obj)), member)); \
+})
+#endif
+
+#ifndef memset_startat
+#define memset_startat(obj, v, member) \
+({ \
+ u8 *__ptr = (u8 *)(obj); \
+ typeof(v) __val = (v); \
+ memset(__ptr + offsetof(typeof(*(obj)), member), __val, \
+ sizeof(*(obj)) - offsetof(typeof(*(obj)), member)); \
+})
+#endif
+
#endif /* __BACKPORT_LINUX_STRING_H */
--
2.37.3
--
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