Commit b533a83f authored by David Howells's avatar David Howells
Browse files

netfs, mm: Move PG_fscache helper funcs to linux/netfs.h 



Move the PG_fscache related helper funcs (such as SetPageFsCache()) to
linux/netfs.h rather than linux/fscache.h as the intention is to move to a
model where they're used by the network filesystem and the helper library,
but not by fscache/cachefiles itself.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Tested-by: default avatarJeff Layton <jlayton@kernel.org>
Tested-by: default avatarDave Wysochanski <dwysocha@redhat.com>
Tested-By: default avatarMarc Dionne <marc.dionne@auristor.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-mm@kvack.org
cc: linux-cachefs@redhat.com
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-cifs@vger.kernel.org
cc: ceph-devel@vger.kernel.org
cc: v9fs-developer@lists.sourceforge.net
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/161340392347.1303470.18065131603507621762.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/161539534516.286939.6265142985563005000.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/161653792959.2770958.5386546945273988117.stgit@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/161789073997.6155.18442271115255650614.stgit@warthog.procyon.org.uk/ # v6
parent fb28afcc

include/linux/fscache.h

+1 −10
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/pagemap.h>

#include <linux/pagevec.h>

#include <linux/list_bl.h>

#include <linux/netfs.h>



#if defined(CONFIG_FSCACHE) || defined(CONFIG_FSCACHE_MODULE)

#define fscache_available() (1)
@@ -29,16 +30,6 @@ 
#endif





/*

 * overload PG_private_2 to give us PG_fscache - this is used to indicate that

 * a page is currently backed by a local disk cache

 */

#define PageFsCache(page)		PagePrivate2((page))

#define SetPageFsCache(page)		SetPagePrivate2((page))

#define ClearPageFsCache(page)		ClearPagePrivate2((page))

#define TestSetPageFsCache(page)	TestSetPagePrivate2((page))

#define TestClearPageFsCache(page)	TestClearPagePrivate2((page))



/* pattern used to fill dead space in an index entry */

#define FSCACHE_INDEX_DEADFILL_PATTERN 0x79

include/linux/netfs.h

0 → 100644
+29 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-or-later */

/* Network filesystem support services.

 *

 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.

 * Written by David Howells (dhowells@redhat.com)

 *

 * See:

 *

 *	Documentation/filesystems/netfs_library.rst

 *

 * for a description of the network filesystem interface declared here.

 */



#ifndef _LINUX_NETFS_H

#define _LINUX_NETFS_H



#include <linux/pagemap.h>



/*

 * Overload PG_private_2 to give us PG_fscache - this is used to indicate that

 * a page is currently backed by a local disk cache

 */

#define PageFsCache(page)		PagePrivate2((page))

#define SetPageFsCache(page)		SetPagePrivate2((page))

#define ClearPageFsCache(page)		ClearPagePrivate2((page))

#define TestSetPageFsCache(page)	TestSetPagePrivate2((page))

#define TestClearPageFsCache(page)	TestClearPagePrivate2((page))



#endif /* _LINUX_NETFS_H */