From 551f3b72a3cd134b019aacb0c3f8e05194ce283e Mon Sep 17 00:00:00 2001
From: Ross Zwisler <ross.zwisler@linux.intel.com>
Date: Wed, 6 Sep 2017 16:18:47 -0700
Subject: [PATCH] dax: remove DAX code from page_cache_tree_insert()
Git-commit: d01ad197ac3b50a99ea668697acefe12e73c5fea
Patch-Mainline: v4.14-rc1
References: FATE#323721
Now that we no longer insert struct page pointers in DAX radix trees we
can remove the special casing for DAX in page_cache_tree_insert().
This also allows us to make dax_wake_mapping_entry_waiter() local to
fs/dax.c, removing it from dax.h.
Link: http://lkml.kernel.org/r/20170724170616.25810-5-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Hannes Reinecke <hare@suse.com>
---
fs/dax.c | 2 +-
include/linux/dax.h | 2 --
mm/filemap.c | 13 ++-----------
3 files changed, 3 insertions(+), 14 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index 9edbcfa..d5cb455 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -128,7 +128,7 @@ static int wake_exceptional_entry_func(wait_queue_entry_t *wait, unsigned int mo
* correct waitqueue where tasks might be waiting for that old 'entry' and
* wake them.
*/
-void dax_wake_mapping_entry_waiter(struct address_space *mapping,
+static void dax_wake_mapping_entry_waiter(struct address_space *mapping,
pgoff_t index, void *entry, bool wake_all)
{
struct exceptional_entry_key key;
diff --git a/include/linux/dax.h b/include/linux/dax.h
index c9a5dfb5..1c12861 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -113,8 +113,6 @@ int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size,
int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
pgoff_t index);
-void dax_wake_mapping_entry_waiter(struct address_space *mapping,
- pgoff_t index, void *entry, bool wake_all);
#ifdef CONFIG_FS_DAX
int __dax_zero_page_range(struct block_device *bdev,
diff --git a/mm/filemap.c b/mm/filemap.c
index 3db6120..91e6116 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -131,17 +131,8 @@ static int page_cache_tree_insert(struct address_space *mapping,
return -EEXIST;
mapping->nrexceptional--;
- if (!dax_mapping(mapping)) {
- if (shadowp)
- *shadowp = p;
- } else {
- /* DAX can replace empty locked entry with a hole */
- WARN_ON_ONCE(p !=
- dax_radix_locked_entry(0, RADIX_DAX_EMPTY));
- /* Wakeup waiters for exceptional entry lock */
- dax_wake_mapping_entry_waiter(mapping, page->index, p,
- true);
- }
+ if (shadowp)
+ *shadowp = p;
}
__radix_tree_replace(&mapping->page_tree, node, slot, page,
workingset_update_node, mapping);
--
1.8.5.6