Commit af765250 authored by Al Viro's avatar Al Viro
Browse files

sparc32: get rid of fake_swapper_regs 



no reason to have ->kregs of initial thread set up in a special
way - we can keep them on stack, same as for every other thread.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent d17b9ec7

arch/sparc/include/asm/processor_32.h

+1 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ struct thread_struct { 
#define INIT_THREAD  { \

	.flags = SPARC_FLAG_KTHREAD, \

	.current_ds = KERNEL_DS, \

	.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \

}



/* Do necessary setup to start up a newly executed thread. */

arch/sparc/kernel/head_32.S

+1 −1
Original line number Diff line number Diff line
@@ -515,7 +515,7 @@ continue_boot: 


		/* I want a kernel stack NOW! */

		set	init_thread_union, %g1

		set	(THREAD_SIZE - STACKFRAME_SZ), %g2

		set	(THREAD_SIZE - STACKFRAME_SZ - TRACEREG_SZ), %g2

		add	%g1, %g2, %sp

		mov	0, %fp			/* And for good luck */

arch/sparc/kernel/process_32.c

+1 −8
Original line number Diff line number Diff line
@@ -218,14 +218,7 @@ void flush_thread(void) 
	}



	/* This task is no longer a kernel thread. */

	if (current->thread.flags & SPARC_FLAG_KTHREAD) {

	current->thread.flags &= ~SPARC_FLAG_KTHREAD;



		/* We must fixup kregs as well. */

		/* XXX This was not fixed for ti for a while, worked. Unused? */

		current->thread.kregs = (struct pt_regs *)

		    (task_stack_page(current) + (THREAD_SIZE - TRACEREG_SZ));

	}

}



static inline struct sparc_stackf __user *

arch/sparc/kernel/setup_32.c

+0 −3
Original line number Diff line number Diff line
@@ -266,7 +266,6 @@ static __init void leon_patch(void) 
}



struct tt_entry *sparc_ttable;

static struct pt_regs fake_swapper_regs;



/* Called from head_32.S - before we have setup anything

 * in the kernel. Be very careful with what you do here.
@@ -363,8 +362,6 @@ void __init setup_arch(char **cmdline_p) 
		(*(linux_dbvec->teach_debugger))();

	}



	init_task.thread.kregs = &fake_swapper_regs;



	/* Run-time patch instructions to match the cpu model */

	per_cpu_patch();