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[PATCH] mm: split highorder pages

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Have an explicit mm call to split higher order pages into individual pages.
 Should help to avoid bugs and be more explicit about the code's intention.

Signed-off-by: Nick Piggin <[email protected]>
Cc: Russell King <[email protected]>
Cc: David Howells <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Chris Zankel <[email protected]>
Signed-off-by: Yoichi Yuasa <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:05 -08:00 • committed by Linus Torvalds
commit 8dfcc9ba27
9 changed files with 41 additions and 21 deletions
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10
arch/xtensa/mm/pgtable.c
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@ -21,13 +21,9 @@ pte_t* pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
p = (pte_t*) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, COLOR_ORDER);
if (likely(p)) {
struct page *page;
split_page(virt_to_page(p), COLOR_ORDER);
for (i = 0; i < COLOR_SIZE; i++) {
page = virt_to_page(p);
set_page_count(page, 1);
if (ADDR_COLOR(p) == color)
pte = p;
else
@ -55,9 +51,9 @@ struct page* pte_alloc_one(struct mm_struct *mm, unsigned long address)
p = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
if (likely(p)) {
for (i = 0; i < PAGE_ORDER; i++) {
set_page_count(p, 1);
split_page(p, COLOR_ORDER);
for (i = 0; i < PAGE_ORDER; i++) {
if (PADDR_COLOR(page_address(p)) == color)
page = p;
else