From a3d32ac8ff4097346143999f9be490ea6e9ce687 Mon Sep 17 00:00:00 2001
From: gatieme <gatieme@163.com>
Date: Mon, 16 May 2016 22:50:41 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E8=87=AA=E5=AE=9A=E4=B9=89?=
 =?UTF-8?q?=E7=9A=84=E9=80=9A=E8=BF=87thread=5Finfo=E8=8E=B7=E5=8F=96?=
 =?UTF-8?q?=E5=88=B0current=E8=BF=9B=E7=A8=8B=E7=9A=84=E9=A9=B1=E5=8A=A8..?=
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---
 study/kernel/process/task/current/Makefile    | 18 +++++++++
 .../kernel/process/task/current/my_current.c  | 39 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 study/kernel/process/task/current/Makefile
 create mode 100644 study/kernel/process/task/current/my_current.c

diff --git a/study/kernel/process/task/current/Makefile b/study/kernel/process/task/current/Makefile
new file mode 100644
index 0000000..96d7084
--- /dev/null
+++ b/study/kernel/process/task/current/Makefile
@@ -0,0 +1,18 @@
+ifneq ($(KERNELRELEASE),)
+
+obj-m := my_current.o
+
+else
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+
+
+endif
diff --git a/study/kernel/process/task/current/my_current.c b/study/kernel/process/task/current/my_current.c
new file mode 100644
index 0000000..8a9add2
--- /dev/null
+++ b/study/kernel/process/task/current/my_current.c
@@ -0,0 +1,39 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+
+#ifndef THREAD_SIZE
+#define THREAD_SIZE 0x00002000
+#endif
+
+#define my_current my_get_current
+#define my_get_current   (my_current_thread_info()->task)
+
+register unsigned long my_current_stack_pointer asm("esp") __used;
+
+ static inline struct thread_info *my_current_thread_info(void)
+{
+         return (struct thread_info *)
+                 (my_current_stack_pointer & ~(THREAD_SIZE - 1));
+}
+
+static int __init lkp_init(void)
+{
+   printk("pid = %d\n",current->pid);
+   printk("name = %s\n",current->comm);
+   printk("pid = %d\n",my_current->pid);
+   printk("name = %s\n",my_current->comm);
+   return 0;
+}
+
+static void __exit lkp_cleanup(void)
+{
+   printk("<1>bye!\n");
+}
+
+module_init(lkp_init);
+module_exit(lkp_cleanup);
+MODULE_LICENSE("GPL");