shm: Move struct shmid_kernel into ipc/shm.c

All of the users are now in ipc/shm.c so make the definition local to
that file to make code maintenance easier.  AKA to prevent rebuilding
the entire kernel when struct shmid_kernel changes.

Signed-off-by: "Eric W. Biederman" <[email protected]>

Author: ebiederm

include/linux/shm.h

@@ -7,28 +7,6 @@
 #include <uapi/linux/shm.h>
 #include <asm/shmparam.h>
 
-struct shmid_kernel /* private to the kernel */
-{	
-	struct kern_ipc_perm	shm_perm;
-	struct file		*shm_file;
-	unsigned long		shm_nattch;
-	unsigned long		shm_segsz;
-	time64_t		shm_atim;
-	time64_t		shm_dtim;
-	time64_t		shm_ctim;
-	pid_t			shm_cprid;
-	pid_t			shm_lprid;
-	struct user_struct	*mlock_user;
-
-	/* The task created the shm object.  NULL if the task is dead. */
-	struct task_struct	*shm_creator;
-	struct list_head	shm_clist;	/* list by creator */
-} __randomize_layout;
-
-/* shm_mode upper byte flags */
-#define	SHM_DEST	01000	/* segment will be destroyed on last detach */
-#define SHM_LOCKED      02000   /* segment will not be swapped */
-
 #ifdef CONFIG_SYSVIPC
 struct sysv_shm {
 	struct list_head shm_clist;

ipc/shm.c

@@ -48,6 +48,28 @@
 
 #include "util.h"
 
+struct shmid_kernel /* private to the kernel */
+{
+	struct kern_ipc_perm	shm_perm;
+	struct file		*shm_file;
+	unsigned long		shm_nattch;
+	unsigned long		shm_segsz;
+	time64_t		shm_atim;
+	time64_t		shm_dtim;
+	time64_t		shm_ctim;
+	pid_t			shm_cprid;
+	pid_t			shm_lprid;
+	struct user_struct	*mlock_user;
+
+	/* The task created the shm object.  NULL if the task is dead. */
+	struct task_struct	*shm_creator;
+	struct list_head	shm_clist;	/* list by creator */
+} __randomize_layout;
+
+/* shm_mode upper byte flags */
+#define SHM_DEST	01000	/* segment will be destroyed on last detach */
+#define SHM_LOCKED	02000   /* segment will not be swapped */
+
 struct shm_file_data {
 	int id;
 	struct ipc_namespace *ns;