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authorDavid Gibson <david@gibson.dropbear.id.au>2005-06-21 17:14:44 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 18:46:15 -0700
commit63551ae0feaaa23807ebea60de1901564bbef32e (patch)
treef6f97f60f83c3e9813bdfcc6039c499997b1ea10 /arch/sh64
parent1e7e5a9048b30c57ba1ddaa6cdf59b21b65cde99 (diff)
downloadlinux-linaro-stable-63551ae0feaaa23807ebea60de1901564bbef32e.tar.gz
[PATCH] Hugepage consolidation
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>
Diffstat (limited to 'arch/sh64')
-rw-r--r--arch/sh64/mm/hugetlbpage.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/sh64/mm/hugetlbpage.c b/arch/sh64/mm/hugetlbpage.c
index bcad2aefa4ee..dcd9c8a8baf8 100644
--- a/arch/sh64/mm/hugetlbpage.c
+++ b/arch/sh64/mm/hugetlbpage.c
@@ -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.
*/