Re: [PATCH v3 3/8] lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION

[Randy Dunlap <rdunlap@infradead.org>]

On 8/20/25 3:29 AM, Jonathan Cameron wrote:
> +struct cache_coherency_device *
> +_cache_coherency_device_alloc(const struct coherency_ops *ops, size_t size);
> +/**
> + * cache_coherency_device_alloc - Allocate a cache coherency device
> + * @ops: Cache maintenance operations
> + * @drv_struct: structure that contains the struct cache_coherency_device
> + * @member: Name of the struct cache_coherency_device member in @drv_struct.
> + *
> + * This allocates and initializes the cache_coherency_device embedded in the
> + * drv_struct. Upon success the pointer must be freed via
> + * cache_coherency_device_free().
> + *
> + * Returns a 'drv_struct \*' on success, NULL on error.

Preferably:

 * Returns: a &drv_struct * on success, %NULL on error.


> + */
> +#define cache_coherency_device_alloc(ops, drv_struct, member)	    \
> +	({								    \
> +		static_assert(__same_type(struct cache_coherency_device,    \
> +					  ((drv_struct *)NULL)->member));   \
> +		static_assert(offsetof(drv_struct, member) == 0);	    \
> +		(drv_struct *)_cache_coherency_device_alloc(ops,	    \
> +			sizeof(drv_struct));				    \
> +	})
> +void cache_coherency_device_free(struct cache_coherency_device *ccd);
> +
> +#endif

-- 
~Randy