---

yaml --- r: 39020 b: refs/heads/master c: 51ec28e h: refs/heads/master v: v3
git-mirror · Oct 5, 2006 · d6ca8c9 · d6ca8c9
1 parent 0eb4fd0
commit d6ca8c9
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Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f015c6c4d733f68cbc1c5d231bb158abaa5c9606
+refs/heads/master: 51ec28e1b2cb267a09a0b8eac1ccf8d61b7268bf
diff --git a/trunk/arch/i386/kernel/process.c b/trunk/arch/i386/kernel/process.c
@@ -328,6 +328,7 @@ 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));
 
@@ -342,7 +343,10 @@ 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.. */
-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
+	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;
 }
 EXPORT_SYMBOL(kernel_thread);
 

diff --git a/trunk/arch/x86_64/kernel/entry.S b/trunk/arch/x86_64/kernel/entry.S
@@ -978,6 +978,11 @@ 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,