On Mon, Apr 03, 2023 at 08:51:47AM -0700, Nathan Chancellor wrote:
> Hi Stephen (and Greg, just as an FYI):
>
> On Mon, Apr 03, 2023 at 08:24:12PM +1000, Stephen Rothwell wrote:
>
> ...
>
> > Merging driver-core/driver-core-next (43ba3d4af7a7 pktcdvd: simplify the class_pktcdvd logic)
>
> ...
>
> > Merging char-misc/char-misc-next (48a6c7bced2a cdx: add device attributes)
>
> There is a semantic conflict between these two trees:
>
> drivers/cdx/cdx.c:393:8: error: incompatible function pointer types initializing 'ssize_t (*)(const struct bus_type *, const char *, size_t)' (aka 'long (*)(const struct bus_type *, const char *, unsigned long)') with an expression of type
> 'ssize_t (struct bus_type *, const char *, size_t)' (aka 'long (struct bus_type *, const char *, unsigned long)') [-Wincompatible-function-pointer-types]
> static BUS_ATTR_WO(rescan);
> ^~~~~~~~~~~~~~~~~~~
> include/linux/device/bus.h:129:42: note: expanded from macro 'BUS_ATTR_WO'
> struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
> ^~~~~~~~~~~~~~~~
> include/linux/sysfs.h:135:11: note: expanded from macro '__ATTR_WO'
> .store = _name##_store, \
> ^~~~~~~~~~~~~
> <scratch space>:30:1: note: expanded from here
> rescan_store
> ^~~~~~~~~~~~
> 1 error generated.
>
> caused by commit 75cff725d956 ("driver core: bus: mark the struct
> bus_type for sysfs callbacks as constant") in the driver-core tree
> interacting with commit 2959ab247061 ("cdx: add the cdx bus driver") in
> the char-misc tree. The following diff fixes it for me, could it be
> applied to the merge of the char-misc tree (if I am reading the order of
> your merges correctly)?
>
> If there is a better or more appropriate way to report this, please let
> me know.
>
> Cheers,
> Nathan
>
> diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c
> index 67c32cb2c006..38511fd36325 100644
> --- a/drivers/cdx/cdx.c
> +++ b/drivers/cdx/cdx.c
> @@ -363,7 +363,7 @@ static struct attribute *cdx_dev_attrs[] = {
> };
> ATTRIBUTE_GROUPS(cdx_dev);
>
> -static ssize_t rescan_store(struct bus_type *bus,
> +static ssize_t rescan_store(const struct bus_type *bus,
> const char *buf, size_t count)
> {
> struct cdx_controller *cdx;
A patch was already sent for this:
https://lore.kernel.org/r/20230403140416.28183-1-nipun.gupta@xxxxxxx
and yeah, I knew this would happen, I'll fix it up when the trees go to
Linus for -rc1.
thanks,
greg k-h
