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[PATCH] mm: nommu use compound pages

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Now that compound page handling is properly fixed in the VM, move nommu
over to using compound pages rather than rolling their own refcounting.

nommu vm page refcounting is broken anyway, but there is no need to have
divergent code in the core VM now, nor when it gets fixed.

Signed-off-by: Nick Piggin <[email protected]>
Cc: David Howells <[email protected]>

(Needs testing, please).
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:34 -08:00 • committed by Linus Torvalds
commit 84097518d1
6 changed files with 11 additions and 28 deletions
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3
fs/ramfs/file-nommu.c
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@ -87,8 +87,7 @@ static int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
xpages = 1UL << order;
npages = (newsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
for (loop = 0; loop < npages; loop++)
set_page_count(pages + loop, 1);
split_page(pages, order);
/* trim off any pages we don't actually require */
for (loop = npages; loop < xpages; loop++)