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authorMaxime Ripard <mripard@kernel.org>2023-07-11 09:23:20 +0200
committerMaxime Ripard <mripard@kernel.org>2023-07-11 09:23:20 +0200
commit2f98e686ef59b5d19af5847d755798e2031bee3a (patch)
tree7b47919242853d088decf898ca79d6cda0d49381 /include/linux/overflow.h
parenta2848d08742c8e8494675892c02c0d22acbe3cf8 (diff)
parent06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 (diff)
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Merge v6.5-rc1 into drm-misc-fixes
Boris needs 6.5-rc1 in drm-misc-fixes to prevent a conflict. Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'include/linux/overflow.h')
-rw-r--r--include/linux/overflow.h18
1 files changed, 17 insertions, 1 deletions
diff --git a/include/linux/overflow.h b/include/linux/overflow.h
index 0e33b5cbdb9f..f9b60313eaea 100644
--- a/include/linux/overflow.h
+++ b/include/linux/overflow.h
@@ -283,7 +283,7 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
* @member: Name of the array member.
* @count: Number of elements in the array.
*
- * Calculates size of memory needed for structure @p followed by an
+ * Calculates size of memory needed for structure of @p followed by an
* array of @count number of @member elements.
*
* Return: number of bytes needed or SIZE_MAX on overflow.
@@ -293,4 +293,20 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
sizeof(*(p)) + flex_array_size(p, member, count), \
size_add(sizeof(*(p)), flex_array_size(p, member, count)))
+/**
+ * struct_size_t() - Calculate size of structure with trailing flexible array
+ * @type: structure type name.
+ * @member: Name of the array member.
+ * @count: Number of elements in the array.
+ *
+ * Calculates size of memory needed for structure @type followed by an
+ * array of @count number of @member elements. Prefer using struct_size()
+ * when possible instead, to keep calculations associated with a specific
+ * instance variable of type @type.
+ *
+ * Return: number of bytes needed or SIZE_MAX on overflow.
+ */
+#define struct_size_t(type, member, count) \
+ struct_size((type *)NULL, member, count)
+
#endif /* __LINUX_OVERFLOW_H */