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>

diff --git a/arch/mips/include/asm/mips-boards/generic.h b/arch/mips/include/asm/mips-boards/generic.h
index 4861681..b969491 100644 (file)
--- 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 ccd2b75..a9494c0 100644 (file)
--- 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 3c3b0df..5d39bb8 100644 (file)
--- 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 cdea687..7447d32 100644 (file)
--- 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 8e07b5f..69a4c58 100644 (file)
--- 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 bf7fe48..e43f480 100644 (file)
--- 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 0170d82..91d7060 100644 (file)
--- 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,