On 12/21/21 11:18 AM, Linus Torvalds wrote:
> On Tue, Dec 21, 2021 at 11:15 AM Stefan Roesch <shr@xxxxxx> wrote:
>>
>> Linus, if we remove the constness, then we either need to cast away the constness (the system call
>> is defined as const) or change the definition of the system call.
>
> You could also do it as
>
> union {
> const void __user *setxattr_value;
> void __user *getxattr_value;
> };
>
Pavel brought up a very good point. By adding the kname array into the
xarray_ctx we increase the size of io_xattr structure too much. In addition
this will also increase the size of the io_kiocb structure. The original
solution did not increase the size.
Per opcode we limit the storage space to 64 bytes. However the array itself
requires 256 bytes.
> if you wanted to..
>
> Linus
>
