remarkable-linux/fs/orangefs
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
..
acl.c Orangefs: change pvfs2 filenames to orangefs 2015-12-04 12:56:14 -05:00
dcache.c orangefs: use new getattr for revalidate and remove old getattr 2016-03-23 17:36:15 -04:00
devorangefs-req.c orangefs: fix orangefs_superblock locking 2016-03-26 07:22:00 -04:00
dir.c orangefs: saner calling conventions for getting a slot 2016-03-25 22:30:54 -04:00
downcall.h orangefs: use ORANGEFS_NAME_LEN everywhere; remove ORANGEFS_NAME_MAX 2016-02-24 17:07:50 -05:00
file.c orangefs: fix do_readv_writev() handling of error halfway through 2016-03-25 22:30:54 -04:00
inode.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
Kconfig Orangefs: kernel client part 7 2015-10-03 11:40:00 -04:00
Makefile Orangefs: change pvfs2 filenames to orangefs 2015-12-04 12:56:14 -05:00
namei.c orangefs: Avoid symlink upcall if target is too long. 2016-03-09 13:26:39 -05:00
orangefs-bufmap.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
orangefs-bufmap.h orangefs-bufmap.h: trim unused junk 2016-03-25 22:30:54 -04:00
orangefs-cache.c orangefs: get rid of op refcounts 2016-02-19 13:45:56 -05:00
orangefs-debug.h Orangef: remove overlooked old-style userspace debug parts 2015-12-11 11:00:12 -05:00
orangefs-debugfs.c Orangefs: fix sloppy cleanups of debugfs and sysfs init failures. 2016-03-14 15:48:28 -04:00
orangefs-debugfs.h Orangefs: change pvfs2 filenames to orangefs 2015-12-04 12:56:14 -05:00
orangefs-dev-proto.h orangefs: use ORANGEFS_NAME_LEN everywhere; remove ORANGEFS_NAME_MAX 2016-02-24 17:07:50 -05:00
orangefs-kernel.h orangefs: fix orangefs_superblock locking 2016-03-26 07:22:00 -04:00
orangefs-mod.c orangefs: put register_chrdev immediately before register_filesystem 2016-03-17 14:34:10 -04:00
orangefs-sysfs.c Orangefs: fix sloppy cleanups of debugfs and sysfs init failures. 2016-03-14 15:48:28 -04:00
orangefs-sysfs.h Orangefs: change pvfs2 filenames to orangefs 2015-12-04 12:56:14 -05:00
orangefs-utils.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
protocol.h orangefs: we never lookup with sym_follow set 2016-02-24 17:07:51 -05:00
super.c orangefs: fix orangefs_superblock locking 2016-03-26 07:22:00 -04:00
symlink.c Orangefs: follow_link -> get_link change 2016-03-14 15:48:28 -04:00
upcall.h orangefs: remove vestigial async io code 2016-02-24 17:07:50 -05:00
waitqueue.c Orangefs: improve gossip statements 2016-03-03 13:46:48 -05:00
xattr.c orangefs: sanitize listxattr and return EIO on impossible values 2016-03-17 14:33:47 -04:00