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[ARM] fix naming of MODULE_START / MODULE_END

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As of 73bdf0a60e, the kernel needs
to know where modules are located in the virtual address space.
On ARM, we located this region between MODULE_START and MODULE_END.
Unfortunately, everyone else calls it MODULES_VADDR and MODULES_END.
Update ARM to use the same naming, so is_vmalloc_or_module_addr()
can work properly.  Also update the comment on mm/vmalloc.c to
reflect that ARM also places modules in a separate region from the
vmalloc space.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2008-11-06 17:11:07 +00:00 committed by Russell King
parent d2ed5cb80a
commit ab4f2ee130
4 changed files with 13 additions and 13 deletions
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12
arch/arm/include/asm/memory.h
View file

@ -44,10 +44,10 @@
* The module space lives between the addresses given by TASK_SIZE * The module space lives between the addresses given by TASK_SIZE
* and PAGE_OFFSET - it must be within 32MB of the kernel text. * and PAGE_OFFSET - it must be within 32MB of the kernel text.
*/ */
#define MODULE_END (PAGE_OFFSET) #define MODULES_END (PAGE_OFFSET)
#define MODULE_START (MODULE_END - 16*1048576) #define MODULES_VADDR (MODULES_END - 16*1048576)
#if TASK_SIZE > MODULE_START #if TASK_SIZE > MODULES_VADDR
#error Top of user space clashes with start of module space #error Top of user space clashes with start of module space
#endif #endif
@ -56,7 +56,7 @@
* Since we use sections to map it, this macro replaces the physical address * Since we use sections to map it, this macro replaces the physical address
* with its virtual address while keeping offset from the base section. * with its virtual address while keeping offset from the base section.
*/ */
#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff)) #define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
/* /*
* Allow 16MB-aligned ioremap pages * Allow 16MB-aligned ioremap pages
@ -94,8 +94,8 @@
/* /*
* The module can be at any place in ram in nommu mode. * The module can be at any place in ram in nommu mode.
*/ */
#define MODULE_END (END_MEM) #define MODULES_END (END_MEM)
#define MODULE_START (PHYS_OFFSET) #define MODULES_VADDR (PHYS_OFFSET)
#endif /* !CONFIG_MMU */ #endif /* !CONFIG_MMU */

8
arch/arm/kernel/module.c
View file

@ -26,12 +26,12 @@
/* /*
* The XIP kernel text is mapped in the module area for modules and * The XIP kernel text is mapped in the module area for modules and
* some other stuff to work without any indirect relocations. * some other stuff to work without any indirect relocations.
* MODULE_START is redefined here and not in asm/memory.h to avoid * MODULES_VADDR is redefined here and not in asm/memory.h to avoid
* recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off. * recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
*/ */
extern void _etext; extern void _etext;
#undef MODULE_START #undef MODULES_VADDR
#define MODULE_START (((unsigned long)&_etext + ~PGDIR_MASK) & PGDIR_MASK) #define MODULES_VADDR (((unsigned long)&_etext + ~PGDIR_MASK) & PGDIR_MASK)
#endif #endif
#ifdef CONFIG_MMU #ifdef CONFIG_MMU
@ -43,7 +43,7 @@ void *module_alloc(unsigned long size)
if (!size) if (!size)
return NULL; return NULL;
area = __get_vm_area(size, VM_ALLOC, MODULE_START, MODULE_END); area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
if (!area) if (!area)
return NULL; return NULL;

4
arch/arm/mm/mmu.c
View file

@ -654,7 +654,7 @@ static inline void prepare_page_table(struct meminfo *mi)
/* /*
* Clear out all the mappings below the kernel image. * Clear out all the mappings below the kernel image.
*/ */
for (addr = 0; addr < MODULE_START; addr += PGDIR_SIZE) for (addr = 0; addr < MODULES_VADDR; addr += PGDIR_SIZE)
pmd_clear(pmd_off_k(addr)); pmd_clear(pmd_off_k(addr));
#ifdef CONFIG_XIP_KERNEL #ifdef CONFIG_XIP_KERNEL
@ -766,7 +766,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
*/ */
#ifdef CONFIG_XIP_KERNEL #ifdef CONFIG_XIP_KERNEL
map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & SECTION_MASK); map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & SECTION_MASK);
map.virtual = MODULE_START; map.virtual = MODULES_VADDR;
map.length = ((unsigned long)&_etext - map.virtual + ~SECTION_MASK) & SECTION_MASK; map.length = ((unsigned long)&_etext - map.virtual + ~SECTION_MASK) & SECTION_MASK;
map.type = MT_ROM; map.type = MT_ROM;
create_mapping(&map); create_mapping(&map);

2
mm/vmalloc.c
View file

@ -178,7 +178,7 @@ static int vmap_page_range(unsigned long addr, unsigned long end,
static inline int is_vmalloc_or_module_addr(const void *x) static inline int is_vmalloc_or_module_addr(const void *x)
{ {
/* /*
* x86-64 and sparc64 put modules in a special place, * ARM, x86-64 and sparc64 put modules in a special place,
* and fall back on vmalloc() if that fails. Others * and fall back on vmalloc() if that fails. Others
* just put it in the vmalloc space. * just put it in the vmalloc space.
*/ */