2005-04-16 16:20:36 -06:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
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* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PGALLOC_H
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#define _ASM_PGALLOC_H
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#include <linux/highmem.h>
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#include <linux/mm.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 15:22:52 -06:00
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#include <linux/sched.h>
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2005-04-16 16:20:36 -06:00
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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pte_t *pte)
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{
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set_pmd(pmd, __pmd((unsigned long)pte));
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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2008-02-08 05:22:04 -07:00
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pgtable_t pte)
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2005-04-16 16:20:36 -06:00
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{
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set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
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}
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2008-02-08 05:22:04 -07:00
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#define pmd_pgtable(pmd) pmd_page(pmd)
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2005-04-16 16:20:36 -06:00
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2005-02-10 05:19:59 -07:00
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/*
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* Initialize a new pmd table with invalid pointers.
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*/
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extern void pmd_init(unsigned long page, unsigned long pagetable);
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#ifdef CONFIG_64BIT
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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set_pud(pud, __pud((unsigned long)pmd));
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}
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#endif
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2005-04-16 16:20:36 -06:00
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/*
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* Initialize a new pgd / pmd table with invalid pointers.
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*/
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extern void pgd_init(unsigned long page);
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *ret, *init;
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ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
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if (ret) {
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2006-10-23 19:29:01 -06:00
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init = pgd_offset(&init_mm, 0UL);
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2005-04-16 16:20:36 -06:00
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pgd_init((unsigned long)ret);
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memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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}
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return ret;
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}
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2008-02-04 23:29:14 -07:00
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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2005-04-16 16:20:36 -06:00
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{
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free_pages((unsigned long)pgd, PGD_ORDER);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
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unsigned long address)
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{
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pte_t *pte;
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pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, PTE_ORDER);
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return pte;
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}
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static inline struct page *pte_alloc_one(struct mm_struct *mm,
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unsigned long address)
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{
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struct page *pte;
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pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
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2008-02-08 05:22:04 -07:00
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if (pte) {
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2005-04-16 16:20:36 -06:00
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clear_highpage(pte);
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2008-02-08 05:22:04 -07:00
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pgtable_page_ctor(pte);
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}
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2005-04-16 16:20:36 -06:00
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return pte;
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}
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2008-02-04 23:29:14 -07:00
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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2005-04-16 16:20:36 -06:00
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{
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free_pages((unsigned long)pte, PTE_ORDER);
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}
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2008-02-08 05:22:04 -07:00
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static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
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{
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2008-02-08 05:22:04 -07:00
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pgtable_page_dtor(pte);
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2005-04-16 16:20:36 -06:00
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__free_pages(pte, PTE_ORDER);
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}
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2008-02-08 05:22:04 -07:00
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#define __pte_free_tlb(tlb,pte) \
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do { \
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pgtable_page_dtor(pte); \
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tlb_remove_page((tlb), pte); \
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} while (0)
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2005-04-16 16:20:36 -06:00
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2005-09-03 16:56:16 -06:00
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#ifdef CONFIG_32BIT
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2005-04-16 16:20:36 -06:00
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/*
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* allocating and freeing a pmd is trivial: the 1-entry pmd is
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* inside the pgd, so has no extra memory associated with it.
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*/
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2008-02-04 23:29:14 -07:00
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#define pmd_free(mm, x) do { } while (0)
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2007-10-11 16:46:15 -06:00
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#define __pmd_free_tlb(tlb, x) do { } while (0)
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2005-02-10 05:19:59 -07:00
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2005-04-16 16:20:36 -06:00
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#endif
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2005-09-03 16:56:16 -06:00
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#ifdef CONFIG_64BIT
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2005-04-16 16:20:36 -06:00
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pmd_t *pmd;
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pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER);
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if (pmd)
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pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
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return pmd;
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}
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2008-02-04 23:29:14 -07:00
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static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
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2005-04-16 16:20:36 -06:00
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{
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free_pages((unsigned long)pmd, PMD_ORDER);
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}
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2008-02-04 23:29:14 -07:00
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#define __pmd_free_tlb(tlb, x) pmd_free((tlb)->mm, x)
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2005-04-16 16:20:36 -06:00
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#endif
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#define check_pgt_cache() do { } while (0)
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2007-02-18 09:27:34 -07:00
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extern void pagetable_init(void);
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2005-04-16 16:20:36 -06:00
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#endif /* _ASM_PGALLOC_H */
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