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x86: remove now unused clear_kernel_mapping

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Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2008-02-04 16:48:08 +01:00 committed by Ingo Molnar
parent 28d6ee41a6
commit bde1965ce8
2 changed files with 0 additions and 44 deletions
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43
arch/x86/mm/init_64.c
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@ -434,49 +434,6 @@ void __init paging_init(void)
}
#endif
/*
* Unmap a kernel mapping if it exists. This is useful to avoid
* prefetches from the CPU leading to inconsistent cache lines.
* address and size must be aligned to 2MB boundaries.
* Does nothing when the mapping doesn't exist.
*/
void __init clear_kernel_mapping(unsigned long address, unsigned long size)
{
unsigned long end = address + size;
BUG_ON(address & ~PMD_PAGE_MASK);
BUG_ON(size & ~PMD_PAGE_MASK);
for (; address < end; address += PMD_PAGE_SIZE) {
pgd_t *pgd = pgd_offset_k(address);
pud_t *pud;
pmd_t *pmd;
if (pgd_none(*pgd))
continue;
pud = pud_offset(pgd, address);
if (pud_none(*pud))
continue;
pmd = pmd_offset(pud, address);
if (!pmd || pmd_none(*pmd))
continue;
if (!(pmd_val(*pmd) & _PAGE_PSE)) {
/*
* Could handle this, but it should not happen
* currently:
*/
printk(KERN_ERR "clear_kernel_mapping: "
"mapping has been split. will leak memory\n");
pmd_ERROR(*pmd);
}
set_pmd(pmd, __pmd(0));
}
__flush_tlb_all();
}
/*
* Memory hotplug specific functions
*/

1
include/asm-x86/pgtable_64.h
View File

@ -21,7 +21,6 @@ extern pgd_t init_level4_pgt[];
#define swapper_pg_dir init_level4_pgt
extern void paging_init(void);
extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
#endif /* !__ASSEMBLY__ */