ide: make /proc/ide/ optional

All important information/features should be already available through
sysfs and ioctl interfaces.

Add CONFIG_IDE_PROC_FS (CONFIG_SCSI_PROC_FS rip-off) config option,
disabling it makes IDE driver ~5 kB smaller (on x86-32).

While at it add CONFIG_PROC_FS=n versions of proc_ide_{create,destroy}()
and remove no longer needed #ifdefs.

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

12 files changed, 40 insertions, 32 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 5bdf64b77913..a678bbecb489 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -291,6 +291,17 @@ config IDE_TASK_IOCTL
 
           If you are unsure, say N here.
 
+config IDE_PROC_FS
+        bool "legacy /proc/ide/ support"
+        depends on IDE && PROC_FS
+        default y
+        help
+          This option enables support for the various files in
+          /proc/ide.  In Linux 2.6 this has been superseded by
+          files in sysfs but many legacy applications rely on this.
+
+          If unsure say Y.
+
 comment "IDE chipset support/bugfixes"
 
 config IDE_GENERIC
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index d9f029e8ff74..75dc6969e0a7 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -20,7 +20,7 @@ ide-core-$(CONFIG_BLK_DEV_CMD640)	+= pci/cmd640.o
 # Core IDE code - must come before legacy
 ide-core-$(CONFIG_BLK_DEV_IDEPCI)       += setup-pci.o
 ide-core-$(CONFIG_BLK_DEV_IDEDMA)       += ide-dma.o
-ide-core-$(CONFIG_PROC_FS)              += ide-proc.o
+ide-core-$(CONFIG_IDE_PROC_FS)          += ide-proc.o
 ide-core-$(CONFIG_BLK_DEV_IDEPNP)       += ide-pnp.o
 ide-core-$(CONFIG_BLK_DEV_IDEACPI)      += ide-acpi.o
 
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 638becda81c6..c3a0079789fd 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3274,7 +3274,7 @@ int ide_cdrom_setup (ide_drive_t *drive)
         return 0;
 }
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 static
 sector_t ide_cdrom_capacity (ide_drive_t *drive)
 {
@@ -3321,7 +3321,7 @@ static void ide_cd_release(struct kref *kref)
 
 static int ide_cd_probe(ide_drive_t *);
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 static int proc_idecd_read_capacity
         (char *page, char **start, off_t off, int count, int *eof, void *data)
 {
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 37aa6ddd9702..e7bc4d35c40c 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -559,7 +559,7 @@ static sector_t idedisk_capacity (ide_drive_t *drive)
         return drive->capacity64 - drive->sect0;
 }
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 
 static int smart_enable(ide_drive_t *drive)
 {
@@ -683,7 +683,7 @@ static ide_proc_entry_t idedisk_proc[] = {
 
 #define idedisk_proc    NULL
 
-#endif  /* CONFIG_PROC_FS */
+#endif  /* CONFIG_IDE_PROC_FS */
 
 static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
 {
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 57cd21c5b2c1..84d398f71e0f 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -1892,7 +1892,7 @@ static void ide_floppy_release(struct kref *kref)
         kfree(floppy);
 }
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 
 static int proc_idefloppy_read_capacity
         (char *page, char **start, off_t off, int count, int *eof, void *data)
@@ -1914,7 +1914,7 @@ static ide_proc_entry_t idefloppy_proc[] = {
 
 #define idefloppy_proc  NULL
 
-#endif  /* CONFIG_PROC_FS */
+#endif  /* CONFIG_IDE_PROC_FS */
 
 static int ide_floppy_probe(ide_drive_t *);
 
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 4e59239fef75..ad306ae24e24 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -4730,7 +4730,7 @@ static void ide_tape_release(struct kref *kref)
         kfree(tape);
 }
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 
 static int proc_idetape_read_name
         (char *page, char **start, off_t off, int count, int *eof, void *data)
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 73f752142f9e..7a96f6f07494 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -350,7 +350,7 @@ static int ide_system_bus_speed(void)
         return system_bus_speed;
 }
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 struct proc_dir_entry *proc_ide_root;
 #endif
 
@@ -1892,7 +1892,7 @@ static void __init probe_for_hwifs (void)
 
 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
 {
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
         ide_add_proc_entries(drive->proc, driver->proc, drive);
 #endif
 }
@@ -1914,8 +1914,8 @@ EXPORT_SYMBOL(ide_register_subdriver);
 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
 {
         unsigned long flags;
-        
-#ifdef CONFIG_PROC_FS
+
+#ifdef CONFIG_IDE_PROC_FS
         ide_remove_proc_entries(drive->proc, driver->proc);
 #endif
         down(&ide_setting_sem);
@@ -2069,7 +2069,7 @@ static int __init ide_init(void)
 
         init_ide_data();
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
         proc_ide_root = proc_mkdir("ide", NULL);
 #endif
 
@@ -2099,9 +2099,8 @@ static int __init ide_init(void)
         probe_for_hwifs();
         initializing = 0;
 
-#ifdef CONFIG_PROC_FS
         proc_ide_create();
-#endif
+
         return 0;
 }
 
@@ -2141,9 +2140,7 @@ void __exit cleanup_module (void)
         pnpide_exit();
 #endif
 
-#ifdef CONFIG_PROC_FS
         proc_ide_destroy();
-#endif
 
         bus_unregister(&ide_bus_type);
 }
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 76643b626bdd..428efdae0c7b 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -50,7 +50,7 @@ static u8 m5229_revision;
 static u8 chip_is_1543c_e;
 static struct pci_dev *isa_dev;
 
-#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 
@@ -278,7 +278,7 @@ static int ali_get_info (char *buffer, char **addr, off_t offset, int count)
 
         return p-buffer; /* => must be less than 4k! */
 }
-#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
+#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
 
 /**
  *      ali15x3_tune_pio        -       set up chipset for PIO mode
@@ -566,13 +566,13 @@ static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const c
 
         isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 
-#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
         if (!ali_proc) {
                 ali_proc = 1;
                 bmide_dev = dev;
                 ide_pci_create_host_proc("ali", ali_get_info);
         }
-#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
+#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
 
         local_irq_save(flags);
 
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index 7989bdd842a2..becb1a5648b0 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -92,7 +92,7 @@ static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3
  * AMD /proc entry.
  */
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
@@ -402,14 +402,14 @@ static unsigned int __devinit init_chipset_amd74xx(struct pci_dev *dev, const ch
  * Register /proc/ide/amd74xx entry
  */
 
-#if defined(DISPLAY_AMD_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_AMD_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
         if (!amd74xx_proc) {
                 amd_base = pci_resource_start(dev, 4);
                 bmide_dev = dev;
                 ide_pci_create_host_proc("amd74xx", amd74xx_get_info);
                 amd74xx_proc = 1;
         }
-#endif /* DISPLAY_AMD_TIMINGS && CONFIG_PROC_FS */
+#endif /* DISPLAY_AMD_TIMINGS && CONFIG_IDE_PROC_FS */
 
         return dev->irq;
 }
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 19f5ac1f866c..61ea96b5555c 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -74,7 +74,7 @@
 #define UDIDETCR1       0x7B
 #define DTPR1           0x7C
 
-#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 
@@ -165,7 +165,7 @@ static int cmd64x_get_info (char *buffer, char **addr, off_t offset, int count)
         return p-buffer;        /* => must be less than 4k! */
 }
 
-#endif  /* defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS) */
+#endif  /* defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
 
 static u8 quantize_timing(int timing, int quant)
 {
@@ -548,7 +548,7 @@ static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const cha
         (void) pci_write_config_byte(dev, UDIDETCR0, 0xf0);
 #endif /* CONFIG_PPC */
 
-#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
 
         cmd_devs[n_cmd_devs++] = dev;
 
@@ -556,7 +556,7 @@ static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const cha
                 cmd64x_proc = 1;
                 ide_pci_create_host_proc("cmd64x", cmd64x_get_info);
         }
-#endif /* DISPLAY_CMD64X_TIMINGS && CONFIG_PROC_FS */
+#endif /* DISPLAY_CMD64X_TIMINGS && CONFIG_IDE_PROC_FS */
 
         return 0;
 }
diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c
index 41953fe4fa6b..2bde1b92784a 100644
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -191,7 +191,7 @@ static char* chipset_capability[] = {
         "ATA 133 (1st gen)", "ATA 133 (2nd gen)"
 };
 
-#if defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 
@@ -426,7 +426,7 @@ static int sis_get_info (char *buffer, char **addr, off_t offset, int count)
 
         return len > count ? count : len;
 }
-#endif /* defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_PROC_FS) */
+#endif /* defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
 
 /*
  * Configuration functions
@@ -797,7 +797,7 @@ static unsigned int __devinit init_chipset_sis5513 (struct pci_dev *dev, const c
                                 break;
                 }
 
-#if defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_PROC_FS)
+#if defined(DISPLAY_SIS_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
                 if (!sis_proc) {
                         sis_proc = 1;
                         bmide_dev = dev;
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 2b5b8a93bc10..531df3a29c47 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -770,7 +770,7 @@ static void ide_scsi_remove(ide_drive_t *drive)
 
 static int ide_scsi_probe(ide_drive_t *);
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
 static ide_proc_entry_t idescsi_proc[] = {
         { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
         { NULL, 0, NULL, NULL }