Re: VERIFY_READ/WRITE in uaccess.h?

From: Richard Weinberger
Date: Mon May 11 2015 - 17:26:59 EST

Am 11.05.2015 um 23:05 schrieb H. Peter Anvin:
> On 05/10/2015 02:44 AM, Richard Weinberger wrote:
>> Hi!
>> While cleaning up UML's uaccess code I've noticed that not a single architecture
>> is using VERIFY_READ/WRITE in access_ok().
>> One exception is UML, it uses the access type in one check which is in vain anyways.
>> Also asm-generic/uaccess.h drops the type parameter silently.
>> Why do we still carry it around?
>> Is it because we want it for some future architecture which can benefit
>> from it or just because nobody cared enough to do a tree-wide cleanup?
>> I fear it is the latter... ;)
> Or, perhaps, nobody noticed?

Also possible.

While we are at it, access_ok() is IMHO a horrible name. Historic?
Today it is used to find out whether an address is in an
architecture defined range and therefore valid.
Maybe valid_address() would be a better name...

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