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[PATCH] Hugepage consolidation

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A lot of the code in arch/*/mm/hugetlbpage.c is quite similar.  This patch
attempts to consolidate a lot of the code across the arch's, putting the
combined version in mm/hugetlb.c.  There are a couple of uglyish hacks in
order to covert all the hugepage archs, but the result is a very large
reduction in the total amount of code.  It also means things like hugepage
lazy allocation could be implemented in one place, instead of six.

Tested, at least a little, on ppc64, i386 and x86_64.

Notes:
	- this patch changes the meaning of set_huge_pte() to be more
	  analagous to set_pte()
	- does SH4 need s special huge_ptep_get_and_clear()??

Acked-by: William Lee Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Gibson
2005-06-21 17:14:44 -07:00
committed by Linus Torvalds
parent 1e7e5a9048
commit 63551ae0fe
19 changed files with 302 additions and 852 deletions
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18
arch/sh64/mm/hugetlbpage.c
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@@ -24,7 +24,7 @@
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
static pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
pmd_t *pmd;
@@ -39,7 +39,7 @@ static pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
return pte;
}
static pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
pmd_t *pmd;
@@ -80,6 +80,20 @@ static void set_huge_pte(struct mm_struct *mm, struct vm_area_struct *vma,
}
}
pte_t huge_ptep_get_and_clear(pte_t *ptep)
{
pte_t entry;
entry = *ptep;
for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
pte_clear(pte);
pte++;
}
return entry;
}
/*
* This function checks for proper alignment of input addr and len parameters.
*/