diff options
Diffstat (limited to 'include/linux/overflow.h')
| -rw-r--r-- | include/linux/overflow.h | 18 |
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 */ |