From: Arjun Roy <arjunroy@xxxxxxxxxx> pte_index() is either defined as a macro (e.g. sparc64) or as an inlined function (e.g. x86). vm_insert_pages() depends on pte_index but it is not defined on all platforms (e.g. m68k). To fix compilation of vm_insert_pages() on architectures not providing pte_index(), we perform the following fix: 0. For platforms where it is meaningful, and defined as a macro, no change is needed. 1. For platforms where it is meaningful and defined as an inlined function, and we want to use it with vm_insert_pages(), we define a degenerate macro of the form: #define pte_index pte_index 2. vm_insert_pages() checks for the existence of a pte_index macro definition. If found, it implements a batched insert. If not found, it devolves to calling vm_insert_page() in a loop. This patch implements step 1 for x86. Signed-off-by: Arjun Roy <arjunroy@xxxxxxxxxx> --- arch/x86/include/asm/pgtable.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 7e118660bbd9..6658c04bce83 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -823,6 +823,9 @@ static inline unsigned long pmd_index(unsigned long address) */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +/* Degenerative definition so we can test if pte_index is defined for arch. */ +#define pte_index pte_index + /* * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] * -- 2.25.1.481.gfbce0eb801-goog
