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authorMatthew Wilcox <mawilcox@microsoft.com>2018-04-11 02:36:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-11 20:28:39 +0300
commitb93b016313b3ba8003c3b8bb71f569af91f19fc7 (patch)
treead4be96414189dcdf8c972f351ba430996e9fdff /mm/truncate.c
parentf6bb2a2c0b81c47282ddb7883f92e65a063c27dd (diff)
downloadlinux-b93b016313b3ba8003c3b8bb71f569af91f19fc7.tar.xz
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 'mm/truncate.c')
-rw-r--r--mm/truncate.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index c34e2fd4f583..1d2fb2dca96f 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -36,11 +36,11 @@ static inline void __clear_shadow_entry(struct address_space *mapping,
struct radix_tree_node *node;
void **slot;
- if (!__radix_tree_lookup(&mapping->page_tree, index, &node, &slot))
+ if (!__radix_tree_lookup(&mapping->i_pages, index, &node, &slot))
return;
if (*slot != entry)
return;
- __radix_tree_replace(&mapping->page_tree, node, slot, NULL,
+ __radix_tree_replace(&mapping->i_pages, node, slot, NULL,
workingset_update_node);
mapping->nrexceptional--;
}
@@ -48,9 +48,9 @@ static inline void __clear_shadow_entry(struct address_space *mapping,
static void clear_shadow_entry(struct address_space *mapping, pgoff_t index,
void *entry)
{
- spin_lock_irq(&mapping->tree_lock);
+ xa_lock_irq(&mapping->i_pages);
__clear_shadow_entry(mapping, index, entry);
- spin_unlock_irq(&mapping->tree_lock);
+ xa_unlock_irq(&mapping->i_pages);
}
/*
@@ -79,7 +79,7 @@ static void truncate_exceptional_pvec_entries(struct address_space *mapping,
dax = dax_mapping(mapping);
lock = !dax && indices[j] < end;
if (lock)
- spin_lock_irq(&mapping->tree_lock);
+ xa_lock_irq(&mapping->i_pages);
for (i = j; i < pagevec_count(pvec); i++) {
struct page *page = pvec->pages[i];
@@ -102,7 +102,7 @@ static void truncate_exceptional_pvec_entries(struct address_space *mapping,
}
if (lock)
- spin_unlock_irq(&mapping->tree_lock);
+ xa_unlock_irq(&mapping->i_pages);
pvec->nr = j;
}
@@ -518,8 +518,8 @@ void truncate_inode_pages_final(struct address_space *mapping)
* modification that does not see AS_EXITING is
* completed before starting the final truncate.
*/
- spin_lock_irq(&mapping->tree_lock);
- spin_unlock_irq(&mapping->tree_lock);
+ xa_lock_irq(&mapping->i_pages);
+ xa_unlock_irq(&mapping->i_pages);
truncate_inode_pages(mapping, 0);
}
@@ -627,13 +627,13 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
if (page_has_private(page) && !try_to_release_page(page, GFP_KERNEL))
return 0;
- spin_lock_irqsave(&mapping->tree_lock, flags);
+ xa_lock_irqsave(&mapping->i_pages, flags);
if (PageDirty(page))
goto failed;
BUG_ON(page_has_private(page));
__delete_from_page_cache(page, NULL);
- spin_unlock_irqrestore(&mapping->tree_lock, flags);
+ xa_unlock_irqrestore(&mapping->i_pages, flags);
if (mapping->a_ops->freepage)
mapping->a_ops->freepage(page);
@@ -641,7 +641,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
put_page(page); /* pagecache ref */
return 1;
failed:
- spin_unlock_irqrestore(&mapping->tree_lock, flags);
+ xa_unlock_irqrestore(&mapping->i_pages, flags);
return 0;
}