While looking through the zsmalloc.c file I stumbled upon something. On the following line, in the zs_malloc() function: handle = cache_alloc_handle(pool, gfp); https://elixir.bootlin.com/linux/v6.13-rc3/source/mm/zsmalloc.c#L1356 the handle is a result of a typecast from a void pointer to an unsigned long. return (unsigned long)kmem_cache_alloc(...); https://elixir.bootlin.com/linux/v6.13-rc3/source/mm/zsmalloc.c#L333 What's the guarantee that an unsigned long can hold the data from the void pointer? Is this safe to do? Shouldn't there be a special type for doing this type of conversion? I understand the reason for not using the void pointer directly and why they need a "handle" instead, but I'm just a bit confused by the method that has been chosen here. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
