kernel_optimize_test/drivers/ieee1394
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from  to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
..
config_roms.c ieee1394: eth1394: don't autoload by hotplug when ohci1394 starts 2007-04-30 00:00:30 +02:00
config_roms.h ieee1394: eth1394: don't autoload by hotplug when ohci1394 starts 2007-04-30 00:00:30 +02:00
csr1212.c ieee1394/csr1212: fix false positive kmemcheck report 2009-06-15 15:49:31 +02:00
csr1212.h ieee1394: mark bus_info_data as a __be32 array 2009-01-04 23:50:35 +01:00
csr.c ieee1394: Storage class should be before const qualifier 2009-03-24 20:56:52 +01:00
csr.h ieee1394: replace CSR_SET_BUS_INFO_GENERATION macro 2009-01-04 23:50:35 +01:00
dma.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dma.h firesat: copyrights, rename to firedtv, API conversions, fix remote control input 2009-02-24 14:51:26 +01:00
dv1394-private.h ieee1394: dv1394: annotate frame input/output structs as little endian 2009-01-04 23:50:36 +01:00
dv1394.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
dv1394.h
eth1394.c drivers: Kill now superfluous ->last_rx stores 2009-09-02 23:07:36 -07:00
eth1394.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-01-08 11:05:59 -08:00
highlevel.c ieee1394: Storage class should be before const qualifier 2009-03-24 20:56:52 +01:00
highlevel.h ieee1394: mark all hpsb_address_ops instances as const 2009-01-04 23:50:32 +01:00
hosts.c ieee1394: replace CSR_SET_BUS_INFO_GENERATION macro 2009-01-04 23:50:35 +01:00
hosts.h ieee1394: mark bus_info_data as a __be32 array 2009-01-04 23:50:35 +01:00
ieee1394_core.c Make ieee1394_init a fs-initcall 2009-02-26 10:32:31 -08:00
ieee1394_core.h fs: Remove i_cindex from struct inode 2009-06-11 21:36:09 -04:00
ieee1394_hotplug.h [PATCH] ieee1394: remove redundant code from ieee1394_hotplug.h 2006-07-03 12:02:30 -04:00
ieee1394_transactions.c ieee1394: remove superfluous assertions 2009-02-24 14:51:28 +01:00
ieee1394_transactions.h firesat: copyrights, rename to firedtv, API conversions, fix remote control input 2009-02-24 14:51:26 +01:00
ieee1394_types.h ieee1394: safer definition of empty macros 2006-09-17 19:31:20 +02:00
ieee1394-ioctl.h ieee1394: cycle timer read extension for raw1394 2007-02-17 14:39:33 +01:00
ieee1394.h ieee1394: support for speeds greater than S800 2009-01-28 20:31:05 +01:00
init_ohci1394_dma.c x86: early boot debugging via FireWire (ohci1394_dma=early) 2008-01-30 13:34:11 +01:00
iso.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
iso.h firesat: copyrights, rename to firedtv, API conversions, fix remote control input 2009-02-24 14:51:26 +01:00
Kconfig firewire, ieee1394: update Kconfig help 2009-12-29 19:58:17 +01:00
Makefile x86: early boot debugging via FireWire (ohci1394_dma=early) 2008-01-30 13:34:11 +01:00
nodemgr.c Driver core: create lock/unlock functions for struct device 2010-03-07 17:04:52 -08:00
nodemgr.h ieee1394: constify device ID tables 2009-03-24 20:56:53 +01:00
ohci1394.c ieee1394: Use hweight32 2009-11-18 20:30:35 +01:00
ohci1394.h ieee1394: ohci1394: increase AT req. retries, fix ack_busy_X from Panasonic camcorders and others 2009-01-24 11:17:28 +01:00
pcilynx.c Fix misspelling of "should" and "shouldn't" in comments. 2010-02-05 12:22:30 +01:00
pcilynx.h ieee1394: pcilynx: trivial endian annotation 2009-01-04 23:50:34 +01:00
raw1394-private.h ieee1394: raw1394: replace BKL by local mutex, make ioctl() and mmap() thread-safe 2008-10-15 22:21:08 +02:00
raw1394.c headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
raw1394.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
sbp2.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sbp2.h ieee1394: sbp2: add support for disks >2 TB (and 16 bytes long CDBs) 2009-07-02 21:27:01 +02:00
video1394.c headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
video1394.h