linux/include/asm-generic/4level-fixup.h

#ifndef _4LEVEL_FIXUP_H
#define _4LEVEL_FIXUP_H

#define __ARCH_HAS_4LEVEL_HACK
#define __PAGETABLE_PUD_FOLDED

#define PUD_SIZE			PGDIR_SIZE
#define PUD_MASK			PGDIR_MASK
#define PTRS_PER_PUD			1

#define pud_t				pgd_t

#define pmd_alloc(mm, pud, address) \
	((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
 		NULL: pmd_offset(pud, address))

#define pud_alloc(mm, pgd, address)	(pgd)
#define pud_offset(pgd, start)		(pgd)
#define pud_none(pud)			0
#define pud_bad(pud)			0
#define pud_present(pud)		1
#define pud_ERROR(pud)			do { } while (0)
#define pud_clear(pud)			pgd_clear(pud)

#undef pud_free_tlb
#define pud_free_tlb(tlb, x)            do { } while (0)
#define pud_free(x)			do { } while (0)
#define __pud_free_tlb(tlb, x)		do { } while (0)

#undef  pud_addr_end
#define pud_addr_end(addr, end)		(end)

#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`#ifndef _4LEVEL_FIXUP_H`
			`#define _4LEVEL_FIXUP_H`

			`#define __ARCH_HAS_4LEVEL_HACK`
			`#define __PAGETABLE_PUD_FOLDED`

			`#define PUD_SIZE PGDIR_SIZE`
			`#define PUD_MASK PGDIR_MASK`
			`#define PTRS_PER_PUD 1`

			`#define pud_t pgd_t`

[PATCH] mm: ptd_alloc inline and out It seems odd to me that, whereas pud_alloc and pmd_alloc test inline, only calling out-of-line __pud_alloc __pmd_alloc if allocation needed, pte_alloc_map and pte_alloc_kernel are entirely out-of-line. Though it does add a little to kernel size, change them to macros testing inline, calling __pte_alloc or __pte_alloc_kernel to allocate out-of-line. Mark none of them as fastcalls, leave that to CONFIG_REGPARM or not. It also seems more natural for the out-of-line functions to leave the offset calculation and map to the inline, which has to do it anyway for the common case. At least mremap move wants __pte_alloc without _map. Macros rather than inline functions, certainly to avoid the header file issues which arise from CONFIG_HIGHPTE needing kmap_types.h, but also in case any architectures I haven't built would have other such problems. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 2005-10-30 01:16:22 +00:00			`#define pmd_alloc(mm, pud, address) \`
			`((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \`
			`NULL: pmd_offset(pud, address))`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00
			`#define pud_alloc(mm, pgd, address) (pgd)`
			`#define pud_offset(pgd, start) (pgd)`
			`#define pud_none(pud) 0`
			`#define pud_bad(pud) 0`
			`#define pud_present(pud) 1`
			`#define pud_ERROR(pud) do { } while (0)`
			`#define pud_clear(pud) pgd_clear(pud)`

			`#undef pud_free_tlb`
			`#define pud_free_tlb(tlb, x) do { } while (0)`
			`#define pud_free(x) do { } while (0)`
			`#define __pud_free_tlb(tlb, x) do { } while (0)`

			`#undef pud_addr_end`
			`#define pud_addr_end(addr, end) (end)`

			`#endif`