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authorMatthew Wilcox <mawilcox@microsoft.com>2018-04-10 16:36:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-11 10:28:39 -0700
commitb93b016313b3ba8003c3b8bb71f569af91f19fc7 (patch)
treead4be96414189dcdf8c972f351ba430996e9fdff /fs/nilfs2/page.c
parentf6bb2a2c0b81c47282ddb7883f92e65a063c27dd (diff)
downloadlinux-b93b016313b3ba8003c3b8bb71f569af91f19fc7.tar.bz2
page cache: use xa_lock
Remove the address_space ->tree_lock and use the xa_lock newly added to the radix_tree_root. Rename the address_space ->page_tree to ->i_pages, since we don't really care that it's a tree. [willy@infradead.org: fix nds32, fs/dax.c] Link: http://lkml.kernel.org/r/20180406145415.GB20605@bombadil.infradead.orgLink: http://lkml.kernel.org/r/20180313132639.17387-9-willy@infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Acked-by: Jeff Layton <jlayton@redhat.com> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/page.c')
-rw-r--r--fs/nilfs2/page.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 68241512d7c1..4cb850a6f1c2 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -331,15 +331,15 @@ repeat:
struct page *page2;
/* move the page to the destination cache */
- spin_lock_irq(&smap->tree_lock);
- page2 = radix_tree_delete(&smap->page_tree, offset);
+ xa_lock_irq(&smap->i_pages);
+ page2 = radix_tree_delete(&smap->i_pages, offset);
WARN_ON(page2 != page);
smap->nrpages--;
- spin_unlock_irq(&smap->tree_lock);
+ xa_unlock_irq(&smap->i_pages);
- spin_lock_irq(&dmap->tree_lock);
- err = radix_tree_insert(&dmap->page_tree, offset, page);
+ xa_lock_irq(&dmap->i_pages);
+ err = radix_tree_insert(&dmap->i_pages, offset, page);
if (unlikely(err < 0)) {
WARN_ON(err == -EEXIST);
page->mapping = NULL;
@@ -348,11 +348,11 @@ repeat:
page->mapping = dmap;
dmap->nrpages++;
if (PageDirty(page))
- radix_tree_tag_set(&dmap->page_tree,
+ radix_tree_tag_set(&dmap->i_pages,
offset,
PAGECACHE_TAG_DIRTY);
}
- spin_unlock_irq(&dmap->tree_lock);
+ xa_unlock_irq(&dmap->i_pages);
}
unlock_page(page);
}
@@ -474,15 +474,15 @@ int __nilfs_clear_page_dirty(struct page *page)
struct address_space *mapping = page->mapping;
if (mapping) {
- spin_lock_irq(&mapping->tree_lock);
+ xa_lock_irq(&mapping->i_pages);
if (test_bit(PG_dirty, &page->flags)) {
- radix_tree_tag_clear(&mapping->page_tree,
+ radix_tree_tag_clear(&mapping->i_pages,
page_index(page),
PAGECACHE_TAG_DIRTY);
- spin_unlock_irq(&mapping->tree_lock);
+ xa_unlock_irq(&mapping->i_pages);
return clear_page_dirty_for_io(page);
}
- spin_unlock_irq(&mapping->tree_lock);
+ xa_unlock_irq(&mapping->i_pages);
return 0;
}
return TestClearPageDirty(page);