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module: merge module_alloc() finally

Browse source 
As Christoph Hellwig suggested, module_alloc() actually can be
unified for i386 and x86_64 (of course, also UML).

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: 'Ingo Molnar' <mingo@elte.hu>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Amerigo Wang 2009-06-03 21:46:46 -04:00 committed by Rusty Russell
parent c0e5e10bf3
commit c398df30d5
3 changed files with 12 additions and 11 deletions
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7
arch/um/include/asm/pgtable.h
View file

@ -53,16 +53,21 @@ extern unsigned long end_iomem;
#else
# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
#endif
#define MODULES_VADDR VMALLOC_START
#define MODULES_END VMALLOC_END
#define MODULES_LEN (MODULES_VADDR - MODULES_END)
#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
#define __PAGE_KERNEL_EXEC \
(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
/*
* The i386 can't do page protection for execute, and considers that the same

4
arch/x86/include/asm/pgtable_32_types.h
View file

@ -46,6 +46,10 @@ extern bool __vmalloc_start_set; /* set once high_memory is set */
# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
#endif
#define MODULES_VADDR VMALLOC_START
#define MODULES_END VMALLOC_END
#define MODULES_LEN (MODULES_VADDR - MODULES_END)
#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
#endif /* _ASM_X86_PGTABLE_32_DEFS_H */

12
arch/x86/kernel/module.c
View file

@ -34,14 +34,6 @@
#define DEBUGP(fmt...)
#endif
#if defined(CONFIG_UML) || defined(CONFIG_X86_32)
void *module_alloc(unsigned long size)
{
if (size == 0)
return NULL;
return vmalloc_exec(size);
}
#else /*X86_64*/
void *module_alloc(unsigned long size)
{
struct vm_struct *area;
@ -56,9 +48,9 @@ void *module_alloc(unsigned long size)
if (!area)
return NULL;
return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
return __vmalloc_area(area, GFP_KERNEL | __GFP_HIGHMEM,
PAGE_KERNEL_EXEC);
}
#endif
/* Free memory returned from module_alloc */
void module_free(struct module *mod, void *module_region)