x86: remove now unused clear_kernel_mapping

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 0 insertions, 44 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index b7a7992c28b6..5855449ce7aa 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -435,49 +435,6 @@ 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)
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
index 6e615a103c2f..5c86cff3ee79 100644
--- a/include/asm-x86/pgtable_64.h
+++ b/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__ */