RE: [PATCH] x86/ia32: Do not modify the DPL bits for a null selector

[Li, Xin3]

> Thus 3 as a selector is the same as 0, and it doesn't matter to change it or not. But
> when IRET sees an invalid segment register in ES, FS, GS, and DS, it sets it to 0,
> making 0 a preferred null selector value.

To clarify, an invalid segment register value includes NULL selector values.