Re: [PATCH -next v5 2/8] arm64: extable: make uaaccess helper use extable type EX_TYPE_UACCESS_ERR_ZERO

Mark Rutland
2022-06-20T14:27:50Z

On Mon, Jun 20, 2022 at 10:13:41PM +0800, Tong Tiangen wrote:
>
>
> 在 2022/6/20 17:10, Mark Rutland 写道:
> > On Mon, Jun 20, 2022 at 10:59:12AM +0800, Tong Tiangen wrote:
> > > 在 2022/6/18 20:40, Mark Rutland 写道:
> > > The following errors are reported during compilation:
> > > [...]
> > > arch/arm64/lib/clear_user.S:45: Error: invalid operands (*ABS* and *UND*
> > > sections) for `<<'
> > > [...]
> >
> > As above, I'm not seeing this.
> >
> > This suggests that the EX_DATA_REG() macro is going wrong somehow. Assuming the
> > operand types correspond to the LHS and RHS of the expression, this would mean
> > the GPR number is defined, but the REG value is not, and I can't currently see
> > how that can happen.

> Now I can compile success, both versions 9.4.0 and 11.2.0.
>
> I should have made a mistake. There is no problem using your implementation.
> I will send a new version these days.

No problem; thanks for confirming!

Mark.