Re: [PATCH] bcache: make kobj_type structures constant

[Thomas Weißschuh]

Hi Coly,

On 2023-02-15 00:16:03+0800, Coly Li wrote:
> > 2023年2月14日 23:21，Thomas Weißschuh <linux@xxxxxxxxxxxxxx> 写道：
> > 
> > On Tue, Feb 14, 2023 at 05:51:09PM +0800, Coly Li wrote:
> >> 
> >> 
> >>> 2023年2月14日 11:13，Thomas Weißschuh <linux@xxxxxxxxxxxxxx> 写道：
> >>> 
> >>> Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
> >>> the driver core allows the usage of const struct kobj_type.
> >>> 
> >>> Take advantage of this to constify the structure definitions to prevent
> >>> modification at runtime.
> >>> 
> >> 
> >> How the const structure definition can prevent modification at run time?
> > 
> > It will be put into .rodata instead of .data by the compiler.
> > The .rodata section is mapped as read-only via the pagetable.
> > 
> > See Documentation/security/self-protection.rst
> > "Function pointers and sensitive variables must not be writable".
> 
> I see. Thanks for the information.
> 
> This patch will be added into my testing queue, and submitted later.

It seems this was not submitted.
Or did I miss it?

Thanks,
Thomas