linux/fs/udf
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 udf: Update Kconfig description 2015-01-05 11:04:37 +01:00
Makefile switch udf to simple_fsync() 2009-06-11 21:36:13 -04:00
balloc.c udf: Factor out code for creating indirect extent 2015-12-23 18:04:52 +01:00
dir.c udf: Use separate buffer for copying split names 2016-02-09 13:05:23 +01:00
directory.c udf: remove redundant buffer_head.h includes 2015-03-14 07:54:02 +01:00
ecma_167.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
file.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
ialloc.c udf: saner calling conventions for udf_new_inode() 2014-09-04 21:37:41 +02:00
inode.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
lowlevel.c udf: use linux/uaccess.h 2014-07-15 22:40:23 +02:00
misc.c udf: remove redundant buffer_head.h includes 2015-03-14 07:54:02 +01:00
namei.c udf: Use separate buffer for copying split names 2016-02-09 13:05:23 +01:00
osta_udf.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
partition.c udf: remove redundant buffer_head.h includes 2015-03-14 07:54:02 +01:00
super.c udf: Remove struct ustr as non-needed intermediate storage 2016-02-09 13:05:23 +01:00
symlink.c don't put symlink bodies in pagecache into highmem 2015-12-08 22:41:36 -05:00
truncate.c udf: remove redundant buffer_head.h includes 2015-03-14 07:54:02 +01:00
udf_i.h fs: cleanup slight list_entry abuse 2015-06-23 18:01:59 -04:00
udf_sb.h udf: Fortify LVID loading 2013-09-24 11:23:33 +02:00
udfdecl.h udf: Remove struct ustr as non-needed intermediate storage 2016-02-09 13:05:23 +01:00
udfend.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
udftime.c udf: remove redundant sys_tz declaration 2014-09-29 13:45:12 +02:00
unicode.c udf: Merge linux specific translation into CS0 conversion function 2016-02-09 13:05:23 +01:00