On Mon, Aug 26, 2024 at 06:08:11PM +0800, Kunwu Chan wrote:Here[1] have many use of amba_bustype directly outside the drivers/amba
On 2024/8/23 21:48, Andy Shevchenko wrote:...
On Fri, Aug 23, 2024 at 02:42:03PM +0800, Kunwu Chan wrote:
Yes, that's the idea.I found it problematic in the process of making changes.-extern struct bus_type amba_bustype;Can we actually hide this from the outside, i.e. make it static in the C file,
+extern const struct bus_type amba_bustype;
and introduce the dev_is_amba() helper instead?
P.S. You may look at the PNP bus case (some of the latest patches there)
There have some usage of amba_bustype outside the AMBA code ,i.e:
https://elixir.bootlin.com/linux/v6.10.4/source/drivers/iommu/iommu.c#L155
So, If we make the amba_bustype inside the AMBA code, the outside cannot
access.
If only internal access is allowed, it will compile and report an error, howMake it patch series:
should I modify it next, and any suggestions?
1) patch that introduces exported function called dev_is_amba() (1 patch);
2) convert user-by-user (N patches);
3) hide the bus type and make it constant.