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-rw-r--r--include/linux/pid.h5
-rw-r--r--include/linux/pidfs.h8
-rw-r--r--include/uapi/linux/magic.h1
3 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 8124d57752b9..956481128e8d 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -55,6 +55,9 @@ struct pid
refcount_t count;
unsigned int level;
spinlock_t lock;
+#ifdef CONFIG_FS_PID
+ unsigned long ino;
+#endif
/* lists of tasks that use this pid */
struct hlist_head tasks[PIDTYPE_MAX];
struct hlist_head inodes;
@@ -66,8 +69,6 @@ struct pid
extern struct pid init_struct_pid;
-extern const struct file_operations pidfd_fops;
-
struct file;
struct pid *pidfd_pid(const struct file *file);
diff --git a/include/linux/pidfs.h b/include/linux/pidfs.h
new file mode 100644
index 000000000000..75bdf9807802
--- /dev/null
+++ b/include/linux/pidfs.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_PID_FS_H
+#define _LINUX_PID_FS_H
+
+struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags);
+void __init pidfs_init(void);
+
+#endif /* _LINUX_PID_FS_H */
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 6325d1d0e90f..1b40a968ba91 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -101,5 +101,6 @@
#define DMA_BUF_MAGIC 0x444d4142 /* "DMAB" */
#define DEVMEM_MAGIC 0x454d444d /* "DMEM" */
#define SECRETMEM_MAGIC 0x5345434d /* "SECM" */
+#define PID_FS_MAGIC 0x50494446 /* "PIDF" */
#endif /* __LINUX_MAGIC_H__ */