Messages in this thread | | | Date | Fri, 2 Dec 2022 11:45:55 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH 1/4] container_of: add container_of_const() that preserves const-ness of the pointer |
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On Thu, Dec 01, 2022 at 11:21:50PM +0000, Sakari Ailus wrote: > Hi Greg, > > On Thu, Dec 01, 2022 at 08:30:54PM +0100, Greg Kroah-Hartman wrote: > > container_of does not preserve the const-ness of a pointer that is > > passed into it, which can cause C code that passes in a const pointer to > > get a pointer back that is not const and then scribble all over the data > > in it. To prevent this, container_of_const() will preserve the const > > status of the pointer passed into it using the newly available _Generic() > > method. > > "_const" in the name suggests that the macro would always take a const > argument.
I mean it here to be "this will preserve const" as yes, it can take a const. Or not.
> Could this be called e.g. container_of_safe() (for type-safe, but > full type_safe would be a bit long)?
const is an attribute of type safety, container_of is also type-safe as-is, it's just the const portion here that is the difference between the two.
Naming is hard :(
> > -- > Kind regards, > > Sakari Ailus
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