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Commit ff69a4c8 authored by Russell King's avatar Russell King
Browse files

ARM: constify machine_desc structure uses 



struct machine_desc records are defined everywhere as a 'const'
structure, but unfortuantely it loses its const-ness through the use of
linker magic - the symbols which surround the section are not declared
const so it becomes possible not to use 'const' for pointers to these
const structures.

Let's fix this oversight - all pointers to these structures should be
marked const too.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 3b2f64d0

arch/arm/include/asm/mach/arch.h

+2 −2
Original line number Diff line number Diff line
@@ -65,12 +65,12 @@ struct machine_desc { 
/*

 * Current machine - only accessible during boot.

 */

extern struct machine_desc *machine_desc;

extern const struct machine_desc *machine_desc;



/*

 * Machine type table - also only accessible during boot

 */

extern struct machine_desc __arch_info_begin[], __arch_info_end[];

extern const struct machine_desc __arch_info_begin[], __arch_info_end[];

#define for_each_machine_desc(p)			\

	for (p = __arch_info_begin; p < __arch_info_end; p++)

arch/arm/include/asm/memblock.h

+1 −2
Original line number Diff line number Diff line
@@ -4,8 +4,7 @@ 
struct meminfo;

struct machine_desc;



extern void arm_memblock_init(struct meminfo *, struct machine_desc *);



void arm_memblock_init(struct meminfo *, const struct machine_desc *);

phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);



#endif

arch/arm/include/asm/prom.h

+2 −2
Original line number Diff line number Diff line
@@ -15,13 +15,13 @@ 


#ifdef CONFIG_OF



extern struct machine_desc *setup_machine_fdt(unsigned int dt_phys);

extern const struct machine_desc *setup_machine_fdt(unsigned int dt_phys);

extern void arm_dt_memblock_reserve(void);

extern void __init arm_dt_init_cpu_maps(void);



#else /* CONFIG_OF */



static inline struct machine_desc *setup_machine_fdt(unsigned int dt_phys)

static inline const struct machine_desc *setup_machine_fdt(unsigned int dt_phys)

{

	return NULL;

}

arch/arm/kernel/atags.h

+3 −2
Original line number Diff line number Diff line
@@ -7,9 +7,10 @@ static inline void save_atags(struct tag *tags) { } 
void convert_to_tag_list(struct tag *tags);



#ifdef CONFIG_ATAGS

struct machine_desc *setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr);

const struct machine_desc *setup_machine_tags(phys_addr_t __atags_pointer,

	unsigned int machine_nr);

#else

static inline struct machine_desc *

static inline const struct machine_desc *

setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)

{

	early_print("no ATAGS support: can't continue\n");

arch/arm/kernel/atags_parse.c

+3 −3
Original line number Diff line number Diff line
@@ -178,11 +178,11 @@ static void __init squash_mem_tags(struct tag *tag) 
			tag->hdr.tag = ATAG_NONE;

}



struct machine_desc * __init setup_machine_tags(phys_addr_t __atags_pointer,

						unsigned int machine_nr)

const struct machine_desc * __init

setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)

{

	struct tag *tags = (struct tag *)&default_tags;

	struct machine_desc *mdesc = NULL, *p;

	const struct machine_desc *mdesc = NULL, *p;

	char *from = default_command_line;



	default_tags.mem.start = PHYS_OFFSET;