x86_64 的 current_thread_info 实现在哪里？

Question

在我做的 Linux Kernel git 工作目录中：

git grep -n '*current_thread_info('

似乎没有出现与 x86_64 相关的内容。结果是：

arch/arc/include/asm/thread_info.h:62:static inline __attribute_const__ struct thread_info *current_thread_info(void)
arch/arm/include/asm/thread_info.h:86:static inline struct thread_info *current_thread_info(void) __attribute_const__;
arch/arm/include/asm/thread_info.h:88:static inline struct thread_info *current_thread_info(void)
arch/c6x/include/asm/thread_info.h:62:struct thread_info *current_thread_info(void)
arch/csky/include/asm/thread_info.h:43:static inline struct thread_info *current_thread_info(void)
arch/h8300/include/asm/thread_info.h:50:static inline struct thread_info *current_thread_info(void)
arch/m68k/include/asm/thread_info.h:46:static inline struct thread_info *current_thread_info(void)
arch/microblaze/include/asm/thread_info.h:90:static inline struct thread_info *current_thread_info(void)
arch/mips/include/asm/thread_info.h:55:static inline struct thread_info *current_thread_info(void)
arch/nios2/include/asm/thread_info.h:67:static inline struct thread_info *current_thread_info(void)
arch/sh/include/asm/thread_info.h:70:static inline struct thread_info *current_thread_info(void)
arch/sparc/include/asm/thread_info_64.h:128:extern struct thread_info *current_thread_info(void);
arch/um/include/asm/thread_info.h:44:static inline struct thread_info *current_thread_info(void)
arch/unicore32/include/asm/thread_info.h:90:static inline struct thread_info *current_thread_info(void) __attribute_const__;
arch/unicore32/include/asm/thread_info.h:92:static inline struct thread_info *current_thread_info(void)
arch/xtensa/include/asm/thread_info.h:84:static inline struct thread_info *current_thread_info(void)

知道在哪里可以找到 x86_64 的 current_thread_info 实现吗？

Answer 1

我找到了：

include/linux/thread_info.h
arch/x86/include/asm/current.h

Answer 2

使用当前指针获取与当前运行的内核线程相关的信息。 例如：打印 pid 使用 printf("%d",current->pid);