mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 23:04:54 +01:00
Mike Rapoport
a73c948952
Patch series "mm: remove __ARCH_HAS_4LEVEL_HACK", v13. These patches convert several architectures to use page table folding and remove __ARCH_HAS_4LEVEL_HACK along with include/asm-generic/4level-fixup.h. For the nommu configurations the folding is already implemented by the generic code so the only change was to use the appropriate header file. As for the rest, the changes are mostly about mechanical replacement of pgd accessors with pud/pmd ones and the addition of higher levels to page table traversals. With Vineet's patches from "elide extraneous generated code for folded p4d/pud/pmd" series [1] there is a small shrink of the kernel size of about -0.01% for the defconfig builds. This patch (of 13): It is not likely alpha will have 5-level page tables. Replace usage of include/asm-generic/4level-fixup.h and implied __ARCH_HAS_4LEVEL_HACK with include/asm-generic/pgtable-nopud.h and adjust page table manipulation macros and functions accordingly. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Greg Ungerer <[email protected]> Cc: Helge Deller <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Mark Salter <[email protected]> Cc: Matt Turner <[email protected]> Cc: Michal Simek <[email protected]> Cc: Peter Rosin <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rolf Eike Beer <[email protected]> Cc: Russell King <[email protected]> Cc: Sam Creasey <[email protected]> Cc: Vincent Chen <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Anatoly Pugachev <[email protected]> Cc: Russell King <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ALPHA_PGALLOC_H
|
|
#define _ALPHA_PGALLOC_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/mmzone.h>
|
|
|
|
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
|
|
|
|
/*
|
|
* Allocate and free page tables. The xxx_kernel() versions are
|
|
* used to allocate a kernel page table - this turns on ASN bits
|
|
* if any.
|
|
*/
|
|
|
|
static inline void
|
|
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
|
|
{
|
|
pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
|
|
}
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
static inline void
|
|
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
|
|
{
|
|
pmd_set(pmd, pte);
|
|
}
|
|
|
|
static inline void
|
|
pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
pud_set(pud, pmd);
|
|
}
|
|
|
|
extern pgd_t *pgd_alloc(struct mm_struct *mm);
|
|
|
|
static inline void
|
|
pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
free_page((unsigned long)pgd);
|
|
}
|
|
|
|
static inline pmd_t *
|
|
pmd_alloc_one(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
pmd_t *ret = (pmd_t *)__get_free_page(GFP_PGTABLE_USER);
|
|
return ret;
|
|
}
|
|
|
|
static inline void
|
|
pmd_free(struct mm_struct *mm, pmd_t *pmd)
|
|
{
|
|
free_page((unsigned long)pmd);
|
|
}
|
|
|
|
#endif /* _ALPHA_PGALLOC_H */
|