On Thu, Apr 30, 2020 at 11:42:20AM -0700, Andy Lutomirski wrote: > I suppose there could be a consistent naming like this: > > copy_from_user() > copy_to_user() > > copy_from_unchecked_kernel_address() [what probe_kernel_read() is] > copy_to_unchecked_kernel_address() [what probe_kernel_write() is] > > copy_from_fallible() [from a kernel address that can fail to a kernel > address that can't fail] > copy_to_fallible() [the opposite, but hopefully identical to memcpy() on x86] > > copy_from_fallible_to_user() > copy_from_user_to_fallible() > > These names are fairly verbose and could probably be improved. How about try_copy_catch(void *dst, void *src, size_t count, int *fault) returns number of bytes not-copied (like copy_to_user etc). if return is not zero, "fault" tells you what type of fault cause the early stop (#PF, #MC). -Tony
