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Subject[PATCH] [10/12] GBPAGES: Remove now unused clear_kernel_mapping
Date

Signed-off-by: Andi Kleen <ak@suse.de>

---
arch/x86/mm/init_64.c | 43 -------------------------------------------
include/asm-x86/pgtable_64.h | 1 -
2 files changed, 44 deletions(-)
Index: linux/arch/x86/mm/init_64.c
===================================================================
--- linux.orig/arch/x86/mm/init_64.c
+++ linux/arch/x86/mm/init_64.c
@@ -456,49 +456,6 @@ 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
*/
void online_page(struct page *page)
Index: linux/include/asm-x86/pgtable_64.h
===================================================================
--- linux.orig/include/asm-x86/pgtable_64.h
+++ linux/include/asm-x86/pgtable_64.h
@@ -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__ */


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