ARC: Fix thread_saved_pc() (3240dd57) · Commits · 戴 / test

arch/arc/include/asm/processor.h

+2 −3

Original line number	Diff line number	Diff line
		@@ -47,9 +47,6 @@ struct thread_struct {
		/* Forward declaration, a strange C thing */
		struct task_struct;

		/* Return saved PC of a blocked thread */
		unsigned long thread_saved_pc(struct task_struct *t);

		#define task_pt_regs(p) \
		((struct pt_regs )(THREAD_SIZE + (void )task_stack_page(p)) - 1)

		@@ -86,6 +83,8 @@ unsigned long thread_saved_pc(struct task_struct *t);
		#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
		#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0)

		#define thread_saved_pc(tsk) TSK_K_BLINK(tsk)

		extern void start_thread(struct pt_regs * regs, unsigned long pc,
		unsigned long usp);

+0 −23

Original line number	Diff line number	Diff line
		@@ -192,29 +192,6 @@ int dump_fpu(struct pt_regs regs, elf_fpregset_t fpu)
		return 0;
		}

		/*
		* API: expected by schedular Code: If thread is sleeping where is that.
		* What is this good for? it will be always the scheduler or ret_from_fork.
		* So we hard code that anyways.
		*/
		unsigned long thread_saved_pc(struct task_struct *t)
		{
		struct pt_regs *regs = task_pt_regs(t);
		unsigned long blink = 0;

		/*
		* If the thread being queried for in not itself calling this, then it
		* implies it is not executing, which in turn implies it is sleeping,
		* which in turn implies it got switched OUT by the schedular.
		* In that case, it's kernel mode blink can reliably retrieved as per
		* the picture above (right above pt_regs).
		*/
		if (t != current && t->state != TASK_RUNNING)
		blink = ((unsigned int )regs - 1);

		return blink;
		}

		int elf_check_arch(const struct elf32_hdr *x)
		{
		unsigned int eflags;