Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8cf2c519 authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
Browse files

[PATCH] x86: Revert new unwind kernel stack termination 



Jan convinced me that it was unnecessary because the assembly stubs do
this already on the stack.

Cc: jbeulich@novell.com

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 6bf2dafa

arch/i386/kernel/process.c

+1 −5
Original line number Diff line number Diff line
@@ -336,7 +336,6 @@ extern void kernel_thread_helper(void); 
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)

{

	struct pt_regs regs;

	int err;



	memset(&regs, 0, sizeof(regs));
@@ -351,10 +350,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) 
	regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;



	/* Ok, create the new process.. */

	err = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);

	if (err == 0) /* terminate kernel stack */

		task_pt_regs(current)->eip = 0;

	return err;

	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);

}

EXPORT_SYMBOL(kernel_thread);

arch/x86_64/kernel/entry.S

+0 −5
Original line number Diff line number Diff line
@@ -980,11 +980,6 @@ ENTRY(kernel_thread) 
	call do_fork

	movq %rax,RAX(%rsp)

	xorl %edi,%edi

	test %rax,%rax

	jnz  1f

	/* terminate stack in child */

	movq %rdi,RIP(%rsp)

1:



	/*

	 * It isn't worth to check for reschedule here,