[PATCH 5/5] x86: Merge kernel_thread()

Brian Gerst
2009-12-09T17:35:01Z

arch/x86/kernel/process.c | 35 +++++++++++++++++++++++++++++++++++
arch/x86/kernel/process_32.c | 36 ------------------------------------
arch/x86/kernel/process_64.c | 36 ------------------------------------
3 files changed, 35 insertions(+), 72 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 5e2ba63..ac9ac64 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -234,6 +234,41 @@ int sys_vfork(struct pt_regs *regs)
NULL, NULL);
}

+/*
+ * This gets run with %si containing the
+ * function to call, and %di containing
+ * the "args".
+ */
+extern void kernel_thread_helper(void);
+
+/*
+ * Create a kernel thread
+ */
+int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
+{
+ struct pt_regs regs;
+
+ memset(&regs, 0, sizeof(regs));
+
+ regs.si = (unsigned long) fn;
+ regs.di = (unsigned long) arg;
+
+#ifdef CONFIG_X86_32
+ regs.ds = __USER_DS;
+ regs.es = __USER_DS;
+ regs.fs = __KERNEL_PERCPU;
+ regs.gs = __KERNEL_STACK_CANARY;
+#endif
+
+ regs.orig_ax = -1;
+ regs.ip = (unsigned long) kernel_thread_helper;
+ regs.cs = __KERNEL_CS | get_kernel_rpl();
+ regs.flags = X86_EFLAGS_IF | 0x2;
+
+ /* Ok, create the new process.. */
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
+}
+EXPORT_SYMBOL(kernel_thread);

/*
* Idle related variables and functions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index e45aa22..af2bf74 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -192,42 +192,6 @@ void show_regs(struct pt_regs *regs)
show_trace(NULL, regs, &regs->sp, regs->bp);
}

-/*
- * This gets run with %si containing the
- * function to call, and %di containing
- * the "args".
- */
-extern void kernel_thread_helper(void);
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.si = (unsigned long) fn;
- regs.di = (unsigned long) arg;
-
-#ifdef CONFIG_X86_32
- regs.ds = __USER_DS;
- regs.es = __USER_DS;
- regs.fs = __KERNEL_PERCPU;
- regs.gs = __KERNEL_STACK_CANARY;
-#endif
-
- regs.orig_ax = -1;
- regs.ip = (unsigned long) kernel_thread_helper;
- regs.cs = __KERNEL_CS | get_kernel_rpl();
- regs.flags = X86_EFLAGS_IF | 0x2;
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
void release_thread(struct task_struct *dead_task)
{
BUG_ON(dead_task->mm);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 54c9939..09d3a7b 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -229,42 +229,6 @@ void show_regs(struct pt_regs *regs)
show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
}

-/*
- * This gets run with %si containing the
- * function to call, and %di containing
- * the "args".
- */
-extern void kernel_thread_helper(void);
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.si = (unsigned long) fn;
- regs.di = (unsigned long) arg;
-
-#ifdef CONFIG_X86_32
- regs.ds = __USER_DS;
- regs.es = __USER_DS;
- regs.fs = __KERNEL_PERCPU;
- regs.gs = __KERNEL_STACK_CANARY;
-#endif
-
- regs.orig_ax = -1;
- regs.ip = (unsigned long) kernel_thread_helper;
- regs.cs = __KERNEL_CS | get_kernel_rpl();
- regs.flags = X86_EFLAGS_IF | 0x2;
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
void release_thread(struct task_struct *dead_task)
{
if (dead_task->mm) {
--
1.6.5.2