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page cache: use xa_lock

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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.

[[email protected]: fix nds32, fs/dax.c]
  Link: http://lkml.kernel.org/r/[email protected]: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox <[email protected]>
Acked-by: Jeff Layton <[email protected]>
Cc: Darrick J. Wong <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Ryusuke Konishi <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Matthew Wilcox 2018-04-10 16:36:56 -07:00 • committed by Linus Torvalds
commit b93b016313
39 changed files with 345 additions and 366 deletions
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4
mm/memcontrol.c
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@ -5974,9 +5974,9 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
/*
* Interrupts should be disabled here because the caller holds the
* mapping->tree_lock lock which is taken with interrupts-off. It is
* i_pages lock which is taken with interrupts-off. It is
* important here to have the interrupts disabled because it is the
* only synchronisation we have for udpating the per-CPU variables.
* only synchronisation we have for updating the per-CPU variables.
*/
VM_BUG_ON(!irqs_disabled());
mem_cgroup_charge_statistics(memcg, page, PageTransHuge(page),