Re: [PATCH 3/5] driver core: make struct device_type.uevent() take a const *
From: Matthew Wilcox <willy@infradead.org>
Date: 2022-11-23 17:49:56
Also in:
alsa-devel, linux-acpi, linux-block, linux-devicetree, linux-i2c, linux-i3c, linux-media, linux-serial, linux-usb, lkml, platform-driver-x86
On Wed, Nov 23, 2022 at 01:29:56PM -0400, Jason Gunthorpe wrote:
#define generic_container_of(in_type, in, out_type, out_member) \
_Generic(in, \
const in_type *: ((const out_type *)container_of(in, out_type, out_member)), \
in_type *: ((out_type *)container_of(in, out_type, out_member)) \
)There's a neat trick I found in seqlock.h: #define generic_container_of(in_t, in, out_t, m) \ _Generic(*(in), \ const in_t: ((const out_t *)container_of(in, out_t, m)), \ in_t: ((out_t *)container_of(in, out_type, m)) \ ) and now it fits in 80 columns ;-)
#define kobj_to_dev(__kobj) \ generic_container_of(struct kobject, __kobj, struct device, kobj) Jason