powerpc/32: Setup OF properties for kdump

Refactor the setting of kdump OF properties, moving the common code
from machine_kexec_64.c to machine_kexec.c where it can be used on
both ppc64 and ppc32.  This will be needed for kdump to work on ppc32
platforms.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 40 insertions, 52 deletions

diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index 4f797c0b714..b3abebb7ee6 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -120,6 +120,7 @@ int overlaps_crashkernel(unsigned long start, unsigned long size)
 
 /* Values we need to export to the second kernel via the device tree. */
 static unsigned long kernel_end;
+static unsigned long crashk_size;
 
 static struct property kernel_end_prop = {
         .name = "linux,kernel-end",
@@ -127,6 +128,39 @@ static struct property kernel_end_prop = {
         .value = &kernel_end,
 };
 
+static struct property crashk_base_prop = {
+        .name = "linux,crashkernel-base",
+        .length = sizeof(unsigned long),
+        .value = &crashk_res.start,
+};
+
+static struct property crashk_size_prop = {
+        .name = "linux,crashkernel-size",
+        .length = sizeof(unsigned long),
+        .value = &crashk_size,
+};
+
+static void __init export_crashk_values(struct device_node *node)
+{
+        struct property *prop;
+
+        /* There might be existing crash kernel properties, but we can't
+         * be sure what's in them, so remove them. */
+        prop = of_find_property(node, "linux,crashkernel-base", NULL);
+        if (prop)
+                prom_remove_property(node, prop);
+
+        prop = of_find_property(node, "linux,crashkernel-size", NULL);
+        if (prop)
+                prom_remove_property(node, prop);
+
+        if (crashk_res.start != 0) {
+                prom_add_property(node, &crashk_base_prop);
+                crashk_size = crashk_res.end - crashk_res.start + 1;
+                prom_add_property(node, &crashk_size_prop);
+        }
+}
+
 static int __init kexec_setup(void)
 {
         struct device_node *node;
@@ -145,6 +179,8 @@ static int __init kexec_setup(void)
         kernel_end = __pa(_end);
         prom_add_property(node, &kernel_end_prop);
 
+        export_crashk_values(node);
+
         of_node_put(node);
         return 0;
 }
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index a89bce834a5..49e705fcee6 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -303,18 +303,18 @@ static struct property htab_size_prop = {
         .value = &htab_size_bytes,
 };
 
-static void __init export_htab_values(void)
+static int __init export_htab_values(void)
 {
         struct device_node *node;
         struct property *prop;
 
         /* On machines with no htab htab_address is NULL */
         if (!htab_address)
-                return;
+                return -ENODEV;
 
         node = of_find_node_by_path("/chosen");
         if (!node)
-                return;
+                return -ENODEV;
 
         /* remove any stale propertys so ours can be found */
         prop = of_find_property(node, htab_base_prop.name, NULL);
@@ -329,54 +329,6 @@ static void __init export_htab_values(void)
         prom_add_property(node, &htab_size_prop);
 
         of_node_put(node);
-}
-
-static struct property crashk_base_prop = {
-        .name = "linux,crashkernel-base",
-        .length = sizeof(unsigned long),
-        .value = &crashk_res.start,
-};
-
-static unsigned long crashk_size;
-
-static struct property crashk_size_prop = {
-        .name = "linux,crashkernel-size",
-        .length = sizeof(unsigned long),
-        .value = &crashk_size,
-};
-
-static void __init export_crashk_values(void)
-{
-        struct device_node *node;
-        struct property *prop;
-
-        node = of_find_node_by_path("/chosen");
-        if (!node)
-                return;
-
-        /* There might be existing crash kernel properties, but we can't
-         * be sure what's in them, so remove them. */
-        prop = of_find_property(node, "linux,crashkernel-base", NULL);
-        if (prop)
-                prom_remove_property(node, prop);
-
-        prop = of_find_property(node, "linux,crashkernel-size", NULL);
-        if (prop)
-                prom_remove_property(node, prop);
-
-        if (crashk_res.start != 0) {
-                prom_add_property(node, &crashk_base_prop);
-                crashk_size = crashk_res.end - crashk_res.start + 1;
-                prom_add_property(node, &crashk_size_prop);
-        }
-
-        of_node_put(node);
-}
-
-static int __init kexec_setup(void)
-{
-        export_htab_values();
-        export_crashk_values();
         return 0;
 }
-__initcall(kexec_setup);
+late_initcall(export_htab_values);