Differential D29921 Diff 93046 sys/compat/linuxkpi/common/src/linux_fpu.c

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	* SUCH DAMAGE.			* SUCH DAMAGE.
	*/			*/

	#include <sys/types.h>			#include <sys/types.h>
	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/proc.h>			#include <sys/proc.h>
	#include <sys/kernel.h>			#include <sys/kernel.h>

				#include <linux/sched.h>

				#include <asm/fpu/api.h>

				#if defined(__aarch64__) \|\| defined(__amd64__) \|\| defined(__i386__)

	#include <machine/fpu.h>			#include <machine/fpu.h>

	struct fpu_kern_ctx *__lkpi_fpu_ctx;			/*
	unsigned int __lkpi_fpu_ctx_level = 0;			* Technically the Linux API isn't supposed to allow nesting sections
				* either, but currently used versions of GPU drivers rely on nesting
				* working, so we only enter the section on the outermost level.
				*/

	static void			void
	linux_fpu_init(void *arg __unused)			lkpi_kernel_fpu_begin(void)
	{			{
	__lkpi_fpu_ctx = fpu_kern_alloc_ctx(0);			if ((current->fpu_ctx_level)++ == 0)
				fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX);
	}			}
	SYSINIT(linux_fpu, SI_SUB_EVENTHANDLER, SI_ORDER_SECOND, linux_fpu_init, NULL);

	static void			void
	linux_fpu_uninit(void *arg __unused)			lkpi_kernel_fpu_end(void)
	{			{
	fpu_kern_free_ctx(__lkpi_fpu_ctx);			if (--(current->fpu_ctx_level) == 0)
				fpu_kern_leave(curthread, NULL);
	}			}
	SYSUNINIT(linux_fpu, SI_SUB_EVENTHANDLER, SI_ORDER_SECOND, linux_fpu_uninit, NULL);
				#else

				void
				lkpi_kernel_fpu_begin(void)
				{
				}

				void
				lkpi_kernel_fpu_end(void)
				{
				}

				#endif