linuxkpi: Define `DEFINE_XARRAY*()` macros

The `DEFINE_XARRAY*()` macros are used to declare a static xarray.

As the structure embeds a mutex(9), we also need to declare the static
mutex after the `struct xarray`. Thus the slightly awkward definition
of `DEFINE_XARRAY_FLAGS()`.

The DRM generic code started to use `DEFINE_XARRAY_ALLOC()` in Linux
6.12.

Reviewed by:	bz
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56446

This commit is contained in:

Jean-Sébastien Pédron

2026-04-13 23:44:16 +02:00

parent 783d018cf9

commit 796fff59a5

1 changed files with 12 additions and 0 deletions

									
										sys/compat/linuxkpi/common/include/linux/xarray.h
									
		+12
		
												View File
												
				@@ -54,6 +54,18 @@ struct xarray {

					uint32_t xa_flags;	/* see XA_FLAGS_XXX */

				};

				#define	DEFINE_XARRAY_FLAGS(name, flags) \

					struct xarray name = { \

						.xa_head.gfp_mask = GFP_NOWAIT, \

						.xa_flags = flags, \

					}; \

					MTX_SYSINIT(name ## _mtx, &name.xa_lock, \

					    "linuxkpi_DEFINE_XARRAY(" #name ")", \

					    MTX_DEF | MTX_RECURSE)

				#define	DEFINE_XARRAY(name)		DEFINE_XARRAY_FLAGS(name, 0)

				#define	DEFINE_XARRAY_ALLOC(name)	DEFINE_XARRAY_FLAGS(name, XA_FLAGS_ALLOC)

				struct xa_limit {

					uint32_t max;

					uint32_t min;

linuxkpi: Define DEFINE_XARRAY*() macros

linuxkpi: Define `DEFINE_XARRAY*()` macros