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authorIngo Molnar <mingo@kernel.org>2020-06-26 12:24:42 +0200
committerIngo Molnar <mingo@kernel.org>2020-06-26 12:24:42 +0200
commit2c92d787cc9fad57d05c96bd117782183768258a (patch)
tree51c0c567b8be2fd56073a8ce31f8ebd123a7d562 /include/linux/overflow.h
parent145a773aef83181d47ebab21bb33c89233aadb1e (diff)
parent8be3a53e18e0e1a98f288f6c7f5e9da3adbe9c49 (diff)
Merge branch 'linus' into x86/entry, to resolve conflictsx86_entry_for_5.8
Conflicts: arch/x86/kernel/traps.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/overflow.h')
-rw-r--r--include/linux/overflow.h25
1 files changed, 21 insertions, 4 deletions
diff --git a/include/linux/overflow.h b/include/linux/overflow.h
index 659045046468..93fcef105061 100644
--- a/include/linux/overflow.h
+++ b/include/linux/overflow.h
@@ -304,16 +304,33 @@ static inline __must_check size_t __ab_c_size(size_t a, size_t b, size_t c)
* struct_size() - Calculate size of structure with trailing array.
* @p: Pointer to the structure.
* @member: Name of the array member.
- * @n: Number of elements in the array.
+ * @count: Number of elements in the array.
*
* Calculates size of memory needed for structure @p followed by an
- * array of @n @member elements.
+ * array of @count number of @member elements.
*
* Return: number of bytes needed or SIZE_MAX on overflow.
*/
-#define struct_size(p, member, n) \
- __ab_c_size(n, \
+#define struct_size(p, member, count) \
+ __ab_c_size(count, \
sizeof(*(p)->member) + __must_be_array((p)->member),\
sizeof(*(p)))
+/**
+ * flex_array_size() - Calculate size of a flexible array member
+ * within an enclosing structure.
+ *
+ * @p: Pointer to the structure.
+ * @member: Name of the flexible array member.
+ * @count: Number of elements in the array.
+ *
+ * Calculates size of a flexible array of @count number of @member
+ * elements, at the end of structure @p.
+ *
+ * Return: number of bytes needed or SIZE_MAX on overflow.
+ */
+#define flex_array_size(p, member, count) \
+ array_size(count, \
+ sizeof(*(p)->member) + __must_be_array((p)->member))
+
#endif /* __LINUX_OVERFLOW_H */