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mm: remove is_hwpoison_address

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Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Huang Ying 2011-01-30 11:15:49 +08:00 • committed by Marcelo Tosatti
commit f58c9df78c
2 changed files with 0 additions and 40 deletions
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8
include/linux/mm.h
View file

@ -1625,14 +1625,6 @@ extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access); extern void shake_page(struct page *p, int access);
extern atomic_long_t mce_bad_pages; extern atomic_long_t mce_bad_pages;
extern int soft_offline_page(struct page *page, int flags); extern int soft_offline_page(struct page *page, int flags);
#ifdef CONFIG_MEMORY_FAILURE
int is_hwpoison_address(unsigned long addr);
#else
static inline int is_hwpoison_address(unsigned long addr)
{
return 0;
}
#endif
extern void dump_page(struct page *page); extern void dump_page(struct page *page);

32
mm/memory-failure.c
View file

@ -1487,35 +1487,3 @@ done:
/* keep elevated page count for bad page */ /* keep elevated page count for bad page */
return ret; return ret;
} }
/*
* The caller must hold current->mm->mmap_sem in read mode.
*/
int is_hwpoison_address(unsigned long addr)
{
pgd_t *pgdp;
pud_t pud, *pudp;
pmd_t pmd, *pmdp;
pte_t pte, *ptep;
swp_entry_t entry;
pgdp = pgd_offset(current->mm, addr);
if (!pgd_present(*pgdp))
return 0;
pudp = pud_offset(pgdp, addr);
pud = *pudp;
if (!pud_present(pud) || pud_large(pud))
return 0;
pmdp = pmd_offset(pudp, addr);
pmd = *pmdp;
if (!pmd_present(pmd) || pmd_large(pmd))
return 0;
ptep = pte_offset_map(pmdp, addr);
pte = *ptep;
pte_unmap(ptep);
if (!is_swap_pte(pte))
return 0;
entry = pte_to_swp_entry(pte);
return is_hwpoison_entry(entry);
}
EXPORT_SYMBOL_GPL(is_hwpoison_address);