ide: move IDE settings handling to ide-proc.c

* move
	__ide_add_setting()
	ide_add_setting()
	__ide_remove_setting()
	auto_remove_settings()
	ide_find_setting_by_name()
	ide_read_setting()
	ide_write_setting()
	set_xfer_rate()
	ide_add_generic_settings()
	ide_register_subdriver()
	ide_unregister_subdriver()

  from ide.c to ide-proc.c

* set_{io_32bit,pio_mode,using_dma}() cannot be marked static now, fix it

* rename ide_[un]register_subdriver() to ide_proc_[un]register_driver(),
  update device drivers to use new names

* add CONFIG_IDE_PROC_FS=n versions of ide_proc_[un]register_driver()
  and ide_add_generic_settings()

* make ide_find_setting_by_name(), ide_{read,write}_setting()
  and ide_{add,remove}_proc_entries() static

* cover IDE settings code in device drivers with CONFIG_IDE_PROC_FS #ifdef,
  also while at it cover with CONFIG_IDE_PROC_FS #ifdef ide_driver_t.proc

* remove bogus comment from ide.h

* cover with CONFIG_IDE_PROC_FS #ifdef .proc and .settings in ide_drive_t

Besides saner code this patch results in the IDE core smaller by ~2 kB
(on x86-32) and IDE disk driver by ~1 kB (ditto) when CONFIG_IDE_PROC_FS=n.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 23 insertions, 16 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 591a0b55e31c..477b8c6be727 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -559,9 +559,10 @@ typedef struct ide_drive_s {
 	struct ide_drive_s 	*next;	/* circular list of hwgroup drives */
 	void		*driver_data;	/* extra driver data */
 	struct hd_driveid	*id;	/* drive model identification info */
+#ifdef CONFIG_IDE_PROC_FS
 	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
 	struct ide_settings_s *settings;/* /proc/ide/ drive settings */
-
+#endif
 	struct hwif_s		*hwif;	/* actually (ide_hwif_t *) */
 
 	unsigned long sleep;		/* sleep until this time */
@@ -858,8 +859,15 @@ typedef struct hwgroup_s {
 	unsigned char cmd_buf[4];
 } ide_hwgroup_t;
 
-/* structure attached to the request for IDE_TASK_CMDS */
+typedef struct ide_driver_s ide_driver_t;
+
+extern struct semaphore ide_setting_sem;
 
+int set_io_32bit(ide_drive_t *, int);
+int set_pio_mode(ide_drive_t *, int);
+int set_using_dma(ide_drive_t *, int);
+
+#ifdef CONFIG_IDE_PROC_FS
 /*
  * configurable drive settings
  */
@@ -887,12 +895,7 @@ typedef struct ide_settings_s {
 	struct ide_settings_s	*next;
 } ide_settings_t;
 
-extern struct semaphore ide_setting_sem;
 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
-extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
-extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
-extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
-extern void ide_add_generic_settings(ide_drive_t *drive);
 
 /*
  * /proc/ide interface
@@ -904,15 +907,17 @@ typedef struct {
 	write_proc_t	*write_proc;
 } ide_proc_entry_t;
 
-#ifdef CONFIG_IDE_PROC_FS
 extern struct proc_dir_entry *proc_ide_root;
 
 void proc_ide_create(void);
 void proc_ide_destroy(void);
 void create_proc_ide_interfaces(void);
 void destroy_proc_ide_interface(ide_hwif_t *);
-void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
-void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
+void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
+void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
+
+void ide_add_generic_settings(ide_drive_t *);
+
 read_proc_t proc_ide_read_capacity;
 read_proc_t proc_ide_read_geometry;
 
@@ -940,6 +945,9 @@ static inline void proc_ide_create(void) { ; }
 static inline void proc_ide_destroy(void) { ; }
 static inline void create_proc_ide_interfaces(void) { ; }
 static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
+static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
+static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
+static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 #endif
 
@@ -982,7 +990,7 @@ enum {
  * The gendriver.owner field should be set to the module owner of this driver.
  * The gendriver.name field should be set to the name of this driver
  */
-typedef struct ide_driver_s {
+struct ide_driver_s {
 	const char			*version;
 	u8				media;
 	unsigned supports_dsc_overlap	: 1;
@@ -990,12 +998,14 @@ typedef struct ide_driver_s {
 	int		(*end_request)(ide_drive_t *, int, int);
 	ide_startstop_t	(*error)(ide_drive_t *, struct request *rq, u8, u8);
 	ide_startstop_t	(*abort)(ide_drive_t *, struct request *rq);
-	ide_proc_entry_t	*proc;
 	struct device_driver	gen_driver;
 	int		(*probe)(ide_drive_t *);
 	void		(*remove)(ide_drive_t *);
 	void		(*shutdown)(ide_drive_t *);
-} ide_driver_t;
+#ifdef CONFIG_IDE_PROC_FS
+	ide_proc_entry_t	*proc;
+#endif
+};
 
 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
 
@@ -1205,9 +1215,6 @@ extern void default_hwif_iops(ide_hwif_t *);
 extern void default_hwif_mmiops(ide_hwif_t *);
 extern void default_hwif_transport(ide_hwif_t *);
 
-void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
-void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
-
 #define ON_BOARD		1
 #define NEVER_BOARD		0