ARC: mm: preps ahead of HIGHMEM support
Before we plug in highmem support, some of code needs to be ready for it
- copy_user_highpage() needs to be using the kmap_atomic API
- mk_pte() can't assume page_address()
- do_page_fault() can't assume VMALLOC_END is end of kernel vaddr space
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index f7c7273..bd771351 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -270,13 +270,7 @@
(unsigned long)(((pte_val(x) - CONFIG_LINUX_LINK_BASE) >> \
PAGE_SHIFT)))
-#define mk_pte(page, pgprot) \
-({ \
- pte_t pte; \
- pte_val(pte) = __pa(page_address(page)) + pgprot_val(pgprot); \
- pte; \
-})
-
+#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
@@ -360,7 +354,6 @@
#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
#endif
-extern void paging_init(void);
extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep);