IDE: remove ide=reverse IDE core

This option is obsolete and can be removed safely.

It allows us to remove the pci_get_device_reverse() function from the
PCI core.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Documentation/ide/ide.txt

@@ -269,8 +269,6 @@ Summary of ide driver parameters for kernel command line
 			  ability to bit test for detection is currently
 			  unknown.
 
- "ide=reverse"		: formerly called to pci sub-system, but now local.
-
  "ide=doubler"		: probe/support IDE doublers on Amiga
 
 There may be more options than shown -- use the source, Luke!

Documentation/kernel-parameters.txt

@@ -763,7 +763,7 @@ and is between 256 and 4096 characters. It is defined in the file
 			Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
 
 	ide=		[HW] (E)IDE subsystem
-			Format: ide=nodma or ide=doubler or ide=reverse
+			Format: ide=nodma or ide=doubler
 			See Documentation/ide/ide.txt.
 
 	ide?=		[HW] (E)IDE subsystem

drivers/ide/Kconfig

@@ -416,12 +416,6 @@ config BLK_DEV_OFFBOARD
 	  This can improve the usability of some boot managers such as lilo
 	  when booting from a drive on an off-board controller.
 
-	  If you say Y here, and you actually want to reverse the device scan
-	  order as explained above, you also need to issue the kernel command
-	  line option "ide=reverse". (Try "man bootparam" or see the
-	  documentation of your boot loader (lilo or loadlin) about how to
-	  pass options to the kernel at boot time.)
-
 	  Note that, if you do this, the order of the hd* devices will be
 	  rearranged which may require modification of fstab and other files.
 
@@ -615,8 +609,7 @@ config BLK_DEV_HPT366
 	  reference to device 0x80. The other solution is to say Y to "Boot
 	  off-board chipsets first support" (CONFIG_BLK_DEV_OFFBOARD) unless
 	  your mother board has the chipset natively mounted. Regardless one
-	  should use the fore mentioned option and call at LILO or include
-	  "ide=reverse" in LILO's append-line.
+	  should use the fore mentioned option and call at LILO.
 
 	  This driver requires dynamic tuning of the chipset during the
 	  ide-probe at boot. It is reported to support DVD II drives, by the

drivers/ide/ide-scan-pci.c

@@ -88,13 +88,8 @@ static int __init ide_scan_pcibus(void)
 	struct list_head *l, *n;
 
 	pre_init = 0;
-	if (!ide_scan_direction)
 	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)))
 		ide_scan_pcidev(dev);
-	else
-		while ((dev = pci_get_device_reverse(PCI_ANY_ID, PCI_ANY_ID,
-						     dev)))
-			ide_scan_pcidev(dev);
 
 	/*
 	 *	Hand the drivers over to the PCI layer now we

drivers/ide/ide.c

@@ -90,10 +90,6 @@ static int system_bus_speed;	/* holds what we think is VESA/PCI bus speed */
 DEFINE_MUTEX(ide_cfg_mtx);
  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 
-#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
-int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
-#endif
-
 int noautodma = 0;
 
 #ifdef CONFIG_BLK_DEV_IDEACPI
@@ -1217,14 +1213,6 @@ static int __init ide_setup(char *s)
 		goto obsolete_option;
 	}
 
-#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
-	if (!strcmp(s, "ide=reverse")) {
-		ide_scan_direction = 1;
-		printk(" : Enabled support for IDE inverse scan order.\n");
-		goto obsolete_option;
-	}
-#endif
-
 #ifdef CONFIG_BLK_DEV_IDEACPI
 	if (!strcmp(s, "ide=noacpi")) {
 		//printk(" : Disable IDE ACPI support.\n");

include/linux/ide.h

@@ -990,7 +990,6 @@ extern void do_ide_request(struct request_queue *);
 void ide_init_disk(struct gendisk *, ide_drive_t *);
 
 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
-extern int ide_scan_direction;
 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
 #else