x86: remove now unused clear_kernel_mapping (bde1965c) · Commits · e / devices / android_kernel_sony_msm8994

arch/x86/mm/init_64.c

+0 −43

Original line number	Diff line number	Diff line
		@@ -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
		*/

+0 −1

Original line number	Diff line number	Diff line
		@@ -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__ */