WSL2-Linux-Kernel/fs/gfs2
Kirill A. Shutemov 09cbfeaf1a mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.

This promise never materialized.  And unlikely will.

We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE.  And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.

Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.

Let's stop pretending that pages in page cache are special.  They are
not.

The changes are pretty straight-forward:

 - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

 - page_cache_get() -> get_page();

 - page_cache_release() -> put_page();

This patch contains automated changes generated with coccinelle using
script below.  For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.

The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.

There are few places in the code where coccinelle didn't reach.  I'll
fix them manually in a separate patch.  Comments and documentation also
will be addressed with the separate patch.

virtual patch

@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT

@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE

@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK

@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)

@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)

@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-04 10:41:08 -07:00
..
Kconfig Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
Makefile GFS2: Rename ops_inode.c to inode.c 2011-05-10 13:12:49 +01:00
acl.c posix acls: Remove duplicate xattr name definitions 2015-12-06 21:25:17 -05:00
acl.h posix acls: Remove duplicate xattr name definitions 2015-12-06 21:25:17 -05:00
aops.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
bmap.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
bmap.h GFS2: Clean up journal extent mapping 2014-03-03 13:50:12 +00:00
dentry.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
dir.c GFS2: Eliminate parameter non_block on gfs2_inode_lookup 2016-03-15 10:46:50 -04:00
dir.h GFS2: Make rename not save dirent location 2014-10-01 14:06:15 +01:00
export.c GFS2: Don't filter out I_FREEING inodes anymore 2016-03-15 10:46:45 -04:00
file.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
gfs2.h [GFS2] Remove remote lock dropping code 2008-06-27 09:39:44 +01:00
glock.c GFS2: Don't filter out I_FREEING inodes anymore 2016-03-15 10:46:45 -04:00
glock.h GFS2: Reduce size of incore inode 2015-12-14 12:19:24 -06:00
glops.c gfs2: Invalid security labels of inodes when they go invalid 2015-12-24 11:09:40 -05:00
glops.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
incore.h GFS2: Prevent delete work from occurring on glocks used for create 2016-03-15 10:46:37 -04:00
inode.c GFS2: merge window 2016-03-17 16:51:32 -07:00
inode.h GFS2: Eliminate parameter non_block on gfs2_inode_lookup 2016-03-15 10:46:50 -04:00
lock_dlm.c remove abs64() 2015-11-09 15:11:24 -08:00
log.c gfs2: clear journal live bit in gfs2_log_flush 2015-12-14 12:19:41 -06:00
log.h GFS2: remove transaction glock 2014-05-14 10:04:34 +01:00
lops.c GFS2: merge window 2015-09-11 12:23:51 -07:00
lops.h GFS2: Move log buffer lists into transaction 2014-02-24 16:54:54 +00:00
main.c kmemcg: account certain kmem allocations to memcg 2016-01-14 16:00:49 -08:00
meta_io.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
meta_io.h gfs2: Extended attribute readahead 2015-11-16 12:00:29 -06:00
ops_fstype.c GFS2: Eliminate parameter non_block on gfs2_inode_lookup 2016-03-15 10:46:50 -04:00
quota.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
quota.h GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
recovery.c GFS2: fix sprintf format specifier 2015-01-13 10:48:57 +00:00
recovery.h GFS2: Move recovery variables to journal structure in memory 2014-03-07 09:14:48 +00:00
rgrp.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
rgrp.h GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
super.c GFS2: Check if iopen is held when deleting inode 2016-01-14 08:47:42 -05:00
super.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
sys.c gfs2: convert simple_str to kstr 2015-05-05 13:23:22 -05:00
sys.h GFS2: dlm based recovery coordination 2012-01-11 09:23:05 +00:00
trace_gfs2.h gfs2: Make statistics unsigned, suitable for use with do_div() 2015-09-03 13:33:32 -05:00
trans.c gfs2: Add missing else in trans_add_meta/data 2015-10-01 12:00:59 -05:00
trans.h GFS2: Split gfs2_trans_add_bh() into two 2013-01-29 10:28:04 +00:00
util.c GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
util.h GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
xattr.c GFS2: merge window 2016-01-12 18:09:35 -08:00
xattr.h gfs2: Remove gfs2_xattr_acl_chmod 2015-12-06 21:25:17 -05:00