powerpc: Move /proc/ppc64 to /proc/powerpc and add symlink

Some of the stuff in /proc/ppc64 such as the RTAS bits are actually
useful to some 32-bit platforms. Rename the file, and create a
symlink on 64-bit for backward compatibility

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

6 files changed, 66 insertions, 62 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index b23664a0b86c..3faa39114219 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -42,7 +42,7 @@ obj-$(CONFIG_ALTIVEC)		+= vecemu.o
 obj-$(CONFIG_PPC_970_NAP)       += idle_power4.o
 obj-$(CONFIG_PPC_OF)            += of_device.o of_platform.o prom_parse.o
 obj-$(CONFIG_PPC_CLOCK)         += clock.o
-procfs-$(CONFIG_PPC64)          := proc_ppc64.o
+procfs-y                        := proc_powerpc.o
 obj-$(CONFIG_PROC_FS)           += $(procfs-y)
 rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI)   := rtas_pci.o
 obj-$(CONFIG_PPC_RTAS)          += rtas.o rtas-rtc.o $(rtaspci-y-y)
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index ed0ac4e4b8d8..79a00bb9c64c 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -781,9 +781,9 @@ static int __init lparcfg_init(void)
                         !firmware_has_feature(FW_FEATURE_ISERIES))
                 mode |= S_IWUSR;
 
-        ent = proc_create("ppc64/lparcfg", mode, NULL, &lparcfg_fops);
+        ent = proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops);
         if (!ent) {
-                printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
+                printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
                 return -EIO;
         }
 
diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_powerpc.c
index c647ddef40dc..1ed3b8d7981e 100644
--- a/arch/powerpc/kernel/proc_ppc64.c
+++ b/arch/powerpc/kernel/proc_powerpc.c
@@ -28,55 +28,7 @@
 #include <asm/uaccess.h>
 #include <asm/prom.h>
 
-static loff_t  page_map_seek( struct file *file, loff_t off, int whence);
-static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes,
-                              loff_t *ppos);
-static int     page_map_mmap( struct file *file, struct vm_area_struct *vma );
-
-static const struct file_operations page_map_fops = {
-        .llseek = page_map_seek,
-        .read   = page_map_read,
-        .mmap   = page_map_mmap
-};
-
-/*
- * Create the ppc64 and ppc64/rtas directories early. This allows us to
- * assume that they have been previously created in drivers.
- */
-static int __init proc_ppc64_create(void)
-{
-        struct proc_dir_entry *root;
-
-        root = proc_mkdir("ppc64", NULL);
-        if (!root)
-                return 1;
-
-        if (!of_find_node_by_path("/rtas"))
-                return 0;
-
-        if (!proc_mkdir("rtas", root))
-                return 1;
-
-        if (!proc_symlink("rtas", NULL, "ppc64/rtas"))
-                return 1;
-
-        return 0;
-}
-core_initcall(proc_ppc64_create);
-
-static int __init proc_ppc64_init(void)
-{
-        struct proc_dir_entry *pde;
-
-        pde = proc_create_data("ppc64/systemcfg", S_IFREG|S_IRUGO, NULL,
-                               &page_map_fops, vdso_data);
-        if (!pde)
-                return 1;
-        pde->size = PAGE_SIZE;
-
-        return 0;
-}
-__initcall(proc_ppc64_init);
+#ifdef CONFIG_PPC64
 
 static loff_t page_map_seek( struct file *file, loff_t off, int whence)
 {
@@ -120,3 +72,55 @@ static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
         return 0;
 }
 
+static const struct file_operations page_map_fops = {
+        .llseek = page_map_seek,
+        .read   = page_map_read,
+        .mmap   = page_map_mmap
+};
+
+
+static int __init proc_ppc64_init(void)
+{
+        struct proc_dir_entry *pde;
+
+        pde = proc_create_data("powerpc/systemcfg", S_IFREG|S_IRUGO, NULL,
+                               &page_map_fops, vdso_data);
+        if (!pde)
+                return 1;
+        pde->size = PAGE_SIZE;
+
+        return 0;
+}
+__initcall(proc_ppc64_init);
+
+#endif /* CONFIG_PPC64 */
+
+/*
+ * Create the ppc64 and ppc64/rtas directories early. This allows us to
+ * assume that they have been previously created in drivers.
+ */
+static int __init proc_ppc64_create(void)
+{
+        struct proc_dir_entry *root;
+
+        root = proc_mkdir("powerpc", NULL);
+        if (!root)
+                return 1;
+
+#ifdef CONFIG_PPC64
+        if (!proc_symlink("ppc64", NULL, "powerpc"))
+                pr_err("Failed to create link /proc/ppc64 -> /proc/powerpc\n");
+#endif
+
+        if (!of_find_node_by_path("/rtas"))
+                return 0;
+
+        if (!proc_mkdir("rtas", root))
+                return 1;
+
+        if (!proc_symlink("rtas", NULL, "powerpc/rtas"))
+                return 1;
+
+        return 0;
+}
+core_initcall(proc_ppc64_create);
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 13011a96a977..a85117d5c9a4 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -6,7 +6,7 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  *
- * /proc/ppc64/rtas/firmware_flash interface
+ * /proc/powerpc/rtas/firmware_flash interface
  *
  * This file implements a firmware_flash interface to pump a firmware
  * image into the kernel.  At reboot time rtas_restart() will see the
@@ -740,7 +740,7 @@ static int __init rtas_flash_init(void)
                 return 1;
         }
 
-        firmware_flash_pde = create_flash_pde("ppc64/rtas/"
+        firmware_flash_pde = create_flash_pde("powerpc/rtas/"
                                               FIRMWARE_FLASH_NAME,
                                               &rtas_flash_operations);
         if (firmware_flash_pde == NULL) {
@@ -754,7 +754,7 @@ static int __init rtas_flash_init(void)
         if (rc != 0)
                 goto cleanup;
 
-        firmware_update_pde = create_flash_pde("ppc64/rtas/"
+        firmware_update_pde = create_flash_pde("powerpc/rtas/"
                                                FIRMWARE_UPDATE_NAME,
                                                &rtas_flash_operations);
         if (firmware_update_pde == NULL) {
@@ -768,7 +768,7 @@ static int __init rtas_flash_init(void)
         if (rc != 0)
                 goto cleanup;
 
-        validate_pde = create_flash_pde("ppc64/rtas/" VALIDATE_FLASH_NAME,
+        validate_pde = create_flash_pde("powerpc/rtas/" VALIDATE_FLASH_NAME,
                                         &validate_flash_operations);
         if (validate_pde == NULL) {
                 rc = -ENOMEM;
@@ -781,7 +781,7 @@ static int __init rtas_flash_init(void)
         if (rc != 0)
                 goto cleanup;
 
-        manage_pde = create_flash_pde("ppc64/rtas/" MANAGE_FLASH_NAME,
+        manage_pde = create_flash_pde("powerpc/rtas/" MANAGE_FLASH_NAME,
                                       &manage_flash_operations);
         if (manage_pde == NULL) {
                 rc = -ENOMEM;
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index 2e2bbe120b90..5182d2b992c6 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -184,7 +184,7 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
 }
 
 /*
- * /proc/ppc64/ofdt - yucky binary interface for adding and removing
+ * /proc/powerpc/ofdt - yucky binary interface for adding and removing
  * OF device nodes.  Should be deprecated as soon as we get an
  * in-kernel wrapper for the RTAS ibm,configure-connector call.
  */
@@ -543,7 +543,7 @@ static const struct file_operations ofdt_fops = {
         .write = ofdt_write
 };
 
-/* create /proc/ppc64/ofdt write-only by root */
+/* create /proc/powerpc/ofdt write-only by root */
 static int proc_ppc64_create_ofdt(void)
 {
         struct proc_dir_entry *ent;
@@ -551,7 +551,7 @@ static int proc_ppc64_create_ofdt(void)
         if (!machine_is(pseries))
                 return 0;
 
-        ent = proc_create("ppc64/ofdt", S_IWUSR, NULL, &ofdt_fops);
+        ent = proc_create("powerpc/ofdt", S_IWUSR, NULL, &ofdt_fops);
         if (ent)
                 ent->size = 0;
 
diff --git a/arch/powerpc/platforms/pseries/scanlog.c b/arch/powerpc/platforms/pseries/scanlog.c
index 417eca79df69..1b45c458f952 100644
--- a/arch/powerpc/platforms/pseries/scanlog.c
+++ b/arch/powerpc/platforms/pseries/scanlog.c
@@ -13,7 +13,7 @@
  * of this data using this driver.  A dump exists if the device-tree
  * /chosen/ibm,scan-log-data property exists.
  *
- * This driver exports /proc/ppc64/scan-log-dump which can be read.
+ * This driver exports /proc/powerpc/scan-log-dump which can be read.
  * The driver supports only sequential reads.
  *
  * The driver looks at a write to the driver for the single word "reset".
@@ -186,7 +186,7 @@ static int __init scanlog_init(void)
         if (!data)
                 goto err;
 
-        ent = proc_create_data("ppc64/rtas/scan-log-dump", S_IRUSR, NULL,
+        ent = proc_create_data("powerpc/rtas/scan-log-dump", S_IRUSR, NULL,
                                &scanlog_fops, data);
         if (!ent)
                 goto err;