@@ -125,7 +125,6 @@ extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
extern void efi_sync_low_kernel_mappings(void);
extern int __init efi_alloc_page_tables(void);
extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
-extern void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages);
extern void __init old_map_region(efi_memory_desc_t *md);
extern void __init runtime_code_page_mkexec(void);
extern void __init efi_runtime_update_mappings(void);
@@ -475,8 +475,6 @@ extern pmd_t *lookup_pmd_address(unsigned long address);
extern phys_addr_t slow_virt_to_phys(void *__address);
extern int kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address,
unsigned numpages, unsigned long page_flags);
-void kernel_unmap_pages_in_pgd(pgd_t *root, unsigned long address,
- unsigned numpages);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PGTABLE_DEFS_H */
@@ -746,18 +746,6 @@ static bool try_to_free_pmd_page(pmd_t *pmd)
return true;
}
-static bool try_to_free_pud_page(pud_t *pud)
-{
- int i;
-
- for (i = 0; i < PTRS_PER_PUD; i++)
- if (!pud_none(pud[i]))
- return false;
-
- free_page((unsigned long)pud);
- return true;
-}
-
static bool unmap_pte_range(pmd_t *pmd, unsigned long start, unsigned long end)
{
pte_t *pte = pte_offset_kernel(pmd, start);
@@ -871,16 +859,6 @@ static void unmap_pud_range(pgd_t *pgd, unsigned long start, unsigned long end)
*/
}
-static void unmap_pgd_range(pgd_t *root, unsigned long addr, unsigned long end)
-{
- pgd_t *pgd_entry = root + pgd_index(addr);
-
- unmap_pud_range(pgd_entry, addr, end);
-
- if (try_to_free_pud_page((pud_t *)pgd_page_vaddr(*pgd_entry)))
- pgd_clear(pgd_entry);
-}
-
static int alloc_pte_page(pmd_t *pmd)
{
pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK);
@@ -1993,12 +1971,6 @@ out:
return retval;
}
-void kernel_unmap_pages_in_pgd(pgd_t *root, unsigned long address,
- unsigned numpages)
-{
- unmap_pgd_range(root, address, address + (numpages << PAGE_SHIFT));
-}
-
/*
* The testcases use internal knowledge of the implementation that shouldn't
* be exposed to the rest of the kernel. Include these directly here.
@@ -978,8 +978,6 @@ static void __init __efi_enter_virtual_mode(void)
* EFI mixed mode we need all of memory to be accessible when
* we pass parameters to the EFI runtime services in the
* thunking code.
- *
- * efi_cleanup_page_tables(__pa(new_memmap), 1 << pg_shift);
*/
free_pages((unsigned long)new_memmap, pg_shift);
@@ -49,9 +49,6 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
{
return 0;
}
-void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
-{
-}
void __init efi_map_region(efi_memory_desc_t *md)
{
@@ -285,11 +285,6 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
return 0;
}
-void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
-{
- kernel_unmap_pages_in_pgd(efi_pgd, pa_memmap, num_pages);
-}
-
static void __init __map_region(efi_memory_desc_t *md, u64 va)
{
unsigned long flags = _PAGE_RW;
kernel_unmap_pages_in_pgd() is dangerous: if a pgd entry in init_mm.pgd were to be cleared, callers would need to ensure that the pgd entry hadn't been propagated to any other pgd. Its only caller was efi_cleanup_page_tables(), and that, in turn, was unused, so just delete both functions. This leaves a couple of other helpers unused, so delete them, too. Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: linux-efi@vger.kernel.org Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/include/asm/efi.h | 1 - arch/x86/include/asm/pgtable_types.h | 2 -- arch/x86/mm/pageattr.c | 28 ---------------------------- arch/x86/platform/efi/efi.c | 2 -- arch/x86/platform/efi/efi_32.c | 3 --- arch/x86/platform/efi/efi_64.c | 5 ----- 6 files changed, 41 deletions(-)