linux_dsm_epyc7002/arch/powerpc/platforms
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
..
8xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
40x powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00
44x powerpc/44x/Akebono: Remove select of IBM_EMAC_RGMII_WOL 2014-12-29 15:45:44 +11:00
52xx powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
82xx mdio: Move allocation of interrupts into core 2016-01-07 14:31:26 -05:00
83xx QE: Move QE from arch/powerpc to drivers/soc 2015-12-22 17:12:56 -06:00
85xx powerpc/mpc85xx: Add CPU hotplug support for E6500 2016-03-04 23:58:38 -06:00
86xx powerpc/86xx: Consolidate common platform code 2016-03-11 19:14:12 -06:00
512x mm: introduce page reference manipulation functions 2016-03-17 15:09:34 -07:00
amigaone lib/scatterlist: make ARCH_HAS_SG_CHAIN an actual Kconfig 2014-08-08 15:57:26 -07:00
cell mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
chrp genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
embedded6xx powerpc32: remove ioremap_base 2016-03-11 17:18:02 -06:00
maple powerpc: Remove broken GregorianDay() 2015-12-16 12:54:04 +11:00
pasemi mdio: Move allocation of interrupts into core 2016-01-07 14:31:26 -05:00
powermac Merge branch 'topic/mprofile-kernel' into next 2016-03-11 11:20:15 +11:00
powernv powerpc/powernv: Support PCI config restore for VFs 2016-03-09 09:58:22 +11:00
ps3 powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
pseries powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
fsl_uli1575.c of/irq: Refactor interrupt-map parsing 2013-10-24 11:43:04 +01:00
Kconfig QE: Move QE from arch/powerpc to drivers/soc 2015-12-22 17:12:56 -06:00
Kconfig.cputype powerpc/cell: Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU 2015-10-19 19:51:18 +11:00
Makefile powerpc: Remove platforms/wsp and associated pieces 2014-06-11 16:35:38 +10:00