Re: [PATCH RFC 01/13] x86: Move posted interrupt descriptor out of vmx code

[Jacob Pan]

Hi Thomas,

On Fri, 08 Dec 2023 10:31:20 +0100, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
wrote:

> On Thu, Dec 07 2023 at 20:54, Jacob Pan wrote:
> > On Wed, 06 Dec 2023 17:33:28 +0100, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > wrote:  
> >> On Sat, Nov 11 2023 at 20:16, Jacob Pan wrote:
> >> 	u32			rsvd[6];
> >> } __aligned(64);
> >>   
> > It seems bit-fields cannot pass type check. I got these compile error.  
> 
> And why are you telling me that instead if simply fixing it?
My point is that I am not sure this change is worthwhile unless I don't do
the per CPU pointer check.

gcc cannot take bit-field address afaik. So the problem is that with this
bit-field change we don't have individual members anymore to check pointers.

e.g.
./include/linux/percpu-defs.h:363:20: error: cannot take address of
bit-field ‘nv’ 363 |  __verify_pcpu_ptr(&(variable));  


Thanks,

Jacob