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linux-next/arch/arm/mach-davinci
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 #2 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
..
include/mach Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
board-da830-evm.c davinci: da8xx/omapl1: add support for the second sysconfig module 2010-02-04 13:29:32 -08:00
board-da850-evm.c davinci: da850/omap-l138 EVM: register for suspend support 2010-02-04 13:29:57 -08:00
board-dm355-evm.c Add SDA and SCL pin numbers to i2c platform data 2010-02-04 13:30:06 -08:00
board-dm355-leopard.c DaVinci: rename setup_usb() to davinci_setup_usb() 2009-11-25 10:21:33 -08:00
board-dm365-evm.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
board-dm644x-evm.c Add SDA and SCL pin numbers to i2c platform data 2010-02-04 13:30:06 -08:00
board-dm646x-evm.c davinci: dm646x: CDCE clocks: davinci_clk converted to clk_lookup 2010-03-01 10:19:58 -08:00
board-neuros-osd2.c davinci: Initial support for Neuros OSD2 platform. 2009-11-25 10:21:39 -08:00
board-sffsdr.c davinci: remove unused variable in arch/arm/mach-davinci/board-sffsdr.c 2009-11-25 10:21:38 -08:00
cdce949.c davinci: clock: let clk->set_rate function sleep 2010-02-04 13:30:08 -08:00
clock.c davinci: clkdev cleanup: remove clk_lookup wrapper, use clkdev_add_table() 2010-02-04 13:30:09 -08:00
clock.h davinci: clkdev cleanup: remove clk_lookup wrapper, use clkdev_add_table() 2010-02-04 13:30:09 -08:00
common.c TI Davinci EMAC : Re-use driver for other platforms. 2010-02-04 13:29:50 -08:00
cp_intc.c davinci: cp_intc: provide set_wake function 2010-01-06 08:57:44 -08:00
cpufreq.c davinci: DA850/OMAP-L138: avoid using separate initcall for initializing regulator 2009-11-25 10:21:37 -08:00
cpuidle.c davinci: cpuidle: move mapping of DDR2 controller registers out of driver 2010-02-04 13:29:38 -08:00
da830.c davinci: clkdev cleanup: remove clk_lookup wrapper, use clkdev_add_table() 2010-02-04 13:30:09 -08:00
da850.c davinci: clkdev cleanup: remove clk_lookup wrapper, use clkdev_add_table() 2010-02-04 13:30:09 -08:00
devices-da8xx.c davinci: da8xx/omap-l1xx: Add EDMA platform data for da850/omap-l138 2010-02-04 13:30:04 -08:00
devices.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
dm355.c Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci 2010-03-01 13:05:40 -08:00
dm365.c DaVinci DM365: Adding DM365 SPI support 2010-03-01 10:20:24 -08:00
dm644x.c Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci 2010-03-01 13:05:40 -08:00
dm646x.c davinci: clkdev cleanup: remove clk_lookup wrapper, use clkdev_add_table() 2010-02-04 13:30:09 -08:00
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
gpio.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
io.c ARM: Add caller information to ioremap 2010-02-15 21:39:11 +00:00
irq.c davinci: Move interrupt ctlr info to SoC infrastructure 2009-05-26 08:18:09 -07:00
Kconfig davinci: add support for DM6467T EVM 2010-02-04 13:29:44 -08:00
Makefile davinci: add CDCE949 support on DM6467 EVM 2010-02-04 13:29:59 -08:00
Makefile.boot davinci: da8xx: Add base DA830/OMAP-L137 SoC support 2009-08-26 10:56:59 +03:00
mux.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
mux.h davinci: update pin-multiplexing support 2009-04-27 09:49:46 -07:00
pm.c davinci: add power management support 2010-02-04 13:29:55 -08:00
psc.c davinci: move PSC register definitions from psc.c to psc.h 2010-02-04 13:29:36 -08:00
serial.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
sleep.S davinci: add power management support 2010-02-04 13:29:55 -08:00
sram.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
time.c DaVinci: remove unneeded #include's 2009-11-25 10:21:31 -08:00
usb.c DA8xx: MUSB platform device registration 2009-11-25 10:21:33 -08:00