mips: convert fdt pointers to opaque pointers

The architecture code does not need to access the internals of the FDT
blob directly, so make the pointers to it void * and use char arrays
for section variables.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Grant Likely <grant.likely@linaro.org>

7 files changed, 13 insertions, 15 deletions

diff --git a/arch/mips/include/asm/mips-boards/generic.h b/arch/mips/include/asm/mips-boards/generic.h
index 48616816bcbc..b969491aa98d 100644
--- a/arch/mips/include/asm/mips-boards/generic.h
+++ b/arch/mips/include/asm/mips-boards/generic.h
@@ -67,9 +67,7 @@
 
 extern int mips_revision_sconid;
 
-#ifdef CONFIG_OF
-extern struct boot_param_header __dtb_start;
-#endif
+extern char __dtb_start[];
 
 #ifdef CONFIG_PCI
 extern void mips_pcibios_init(void);
diff --git a/arch/mips/include/asm/prom.h b/arch/mips/include/asm/prom.h
index ccd2b75f152c..a9494c0141fb 100644
--- a/arch/mips/include/asm/prom.h
+++ b/arch/mips/include/asm/prom.h
@@ -21,13 +21,13 @@ extern void device_tree_init(void);
 
 struct boot_param_header;
 
-extern void __dt_setup_arch(struct boot_param_header *bph);
+extern void __dt_setup_arch(void *bph);
 
 #define dt_setup_arch(sym)                                              \
 ({                                                                      \
-        extern struct boot_param_header __dtb_##sym##_begin;            \
+        extern char __dtb_##sym##_begin[];                              \
                                                                         \
-        __dt_setup_arch(&__dtb_##sym##_begin);                          \
+        __dt_setup_arch(__dtb_##sym##_begin);                           \
 })
 
 #else /* CONFIG_OF */
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 3c3b0df8f48d..5d39bb85bf35 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -47,7 +47,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
         return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
 }
 
-void __init __dt_setup_arch(struct boot_param_header *bph)
+void __init __dt_setup_arch(void *bph)
 {
         if (!early_init_dt_scan(bph))
                 return;
diff --git a/arch/mips/lantiq/prom.c b/arch/mips/lantiq/prom.c
index cdea687ad490..7447d322d14e 100644
--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -71,7 +71,7 @@ void __init plat_mem_setup(void)
          * Load the builtin devicetree. This causes the chosen node to be
          * parsed resulting in our memory appearing
          */
-        __dt_setup_arch(&__dtb_start);
+        __dt_setup_arch(__dtb_start);
 }
 
 void __init device_tree_init(void)
diff --git a/arch/mips/lantiq/prom.h b/arch/mips/lantiq/prom.h
index 8e07b5f28ef1..69a4c582338d 100644
--- a/arch/mips/lantiq/prom.h
+++ b/arch/mips/lantiq/prom.h
@@ -26,6 +26,6 @@ struct ltq_soc_info {
 extern void ltq_soc_detect(struct ltq_soc_info *i);
 extern void ltq_soc_init(void);
 
-extern struct boot_param_header __dtb_start;
+extern char __dtb_start[];
 
 #endif
diff --git a/arch/mips/mti-sead3/sead3-setup.c b/arch/mips/mti-sead3/sead3-setup.c
index bf7fe48bf2f9..e43f4801a245 100644
--- a/arch/mips/mti-sead3/sead3-setup.c
+++ b/arch/mips/mti-sead3/sead3-setup.c
@@ -69,17 +69,17 @@ static void __init parse_memsize_param(void)
         if (!memsize)
                 return;
 
-        offset = fdt_path_offset(&__dtb_start, "/memory");
+        offset = fdt_path_offset(__dtb_start, "/memory");
         if (offset > 0) {
                 uint64_t new_value;
                 /*
                  * reg contains 2 32-bits BE values, offset and size. We just
                  * want to replace the size value without affecting the offset
                  */
-                prop_value = fdt_getprop(&__dtb_start, offset, "reg", &prop_len);
+                prop_value = fdt_getprop(__dtb_start, offset, "reg", &prop_len);
                 new_value = be64_to_cpu(*prop_value);
                 new_value =  (new_value & ~0xffffffffllu) | memsize;
-                fdt_setprop_inplace_u64(&__dtb_start, offset, "reg", new_value);
+                fdt_setprop_inplace_u64(__dtb_start, offset, "reg", new_value);
         }
 }
 
@@ -92,7 +92,7 @@ void __init plat_mem_setup(void)
          * Load the builtin devicetree. This causes the chosen node to be
          * parsed resulting in our memory appearing
          */
-        __dt_setup_arch(&__dtb_start);
+        __dt_setup_arch(__dtb_start);
 }
 
 void __init device_tree_init(void)
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index 0170d829d073..91d7060d5aea 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -28,7 +28,7 @@
 __iomem void *rt_sysc_membase;
 __iomem void *rt_memc_membase;
 
-extern struct boot_param_header __dtb_start;
+extern char __dtb_start[];
 
 __iomem void *plat_of_remap_node(const char *node)
 {
@@ -63,7 +63,7 @@ void __init plat_mem_setup(void)
          * Load the builtin devicetree. This causes the chosen node to be
          * parsed resulting in our memory appearing
          */
-        __dt_setup_arch(&__dtb_start);
+        __dt_setup_arch(__dtb_start);
 
         if (soc_info.mem_size)
                 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,