WSL2-Linux-Kernel/arch/parisc/kernel
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
..
.gitignore parisc: add arch/parisc/kernel/.gitignore 2008-10-10 16:32:28 +00:00
Makefile parisc: add ftrace (function and graph tracer) functionality 2009-03-31 02:51:34 +00:00
asm-offsets.c parisc: remove unused IRQSTAT_SIRQ_PEND and IRQSTAT_SZ defines 2009-12-16 03:48:54 +00:00
binfmt_elf32.c [PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY 2008-10-16 15:40:05 +02:00
cache.c parisc: remove trailing space in messages 2010-03-06 22:54:09 +00:00
drivers.c parisc: add uevent helper for parisc bus 2009-01-05 19:11:59 +00:00
entry.S parisc: stop using task->ptrace for {single,block}step flags 2009-09-27 23:07:22 -04:00
firmware.c parisc: expose 32/64-bit capabilities in cpuinfo 2009-03-31 02:51:33 +00:00
ftrace.c parisc: add ftrace (function and graph tracer) functionality 2009-03-31 02:51:34 +00:00
hardware.c [PARISC] add back Crestone Peak cpu 2008-03-15 19:12:19 -07:00
head.S parisc: hijack jump to start_kernel 2008-10-10 16:32:30 +00:00
hpmc.S parisc: export length of os_hpmc vector 2009-01-05 19:18:27 +00:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
inventory.c parisc: inventory.c, fix bloated stack frame 2009-07-03 03:34:11 +00:00
irq.c parisc: Fixup last users of irq_chip->typename 2009-12-16 03:48:56 +00:00
module.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
pa7300lc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pacache.S Revert "parisc: fix trivial section name warnings" 2008-06-13 10:49:45 -04:00
parisc_ksyms.c parisc: add ftrace (function and graph tracer) functionality 2009-03-31 02:51:34 +00:00
pci-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
pci.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
pdc_chassis.c [PARISC] Work around machines which do not support chassis warnings 2006-06-27 23:28:37 +00:00
pdc_cons.c parisc: Use DEFINE_SPINLOCK 2009-01-05 19:13:18 +00:00
perf.c tree-wide: fix a very frequent spelling mistake 2009-11-09 09:40:54 +01:00
perf_asm.S Revert "parisc: fix trivial section name warnings" 2008-06-13 10:49:45 -04:00
perf_images.h [PARISC] Use kzalloc and other janitor-style cleanups 2006-01-22 20:26:31 -05:00
process.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
processor.c parisc: processor.c, fix bloated stack frame 2009-07-03 03:34:11 +00:00
ptrace.c parisc: stop using task->ptrace for {single,block}step flags 2009-09-27 23:07:22 -04:00
real2.S parisc: move pdc_result to real2.S 2008-10-10 16:32:28 +00:00
setup.c parisc: remove CVS keywords 2009-07-03 03:34:06 +00:00
signal.c parisc: fix tracing of signals 2010-02-12 08:51:58 -08:00
signal32.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
signal32.h [PARISC] spelling fixes: arch/parisc/ 2007-05-22 22:52:16 -04:00
smp.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
stacktrace.c parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT 2009-03-31 02:51:34 +00:00
sys32.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys_parisc.c improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
sys_parisc32.c Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux 2009-12-16 10:43:34 -08:00
syscall.S parisc: split syscall_trace into two halves 2009-09-27 23:07:22 -04:00
syscall_table.S improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
time.c parisc: Convert to read/update_persistent_clock 2010-03-06 22:54:10 +00:00
topology.c parisc: Replace NR_CPUS in parisc code 2009-01-05 19:09:02 +00:00
traps.c parisc: fix warning in traps.c 2009-08-28 19:37:20 -10:00
unaligned.c parisc: use __ratelimit in unaligned.c 2010-03-06 22:54:59 +00:00
unwind.c parisc: use sort() instead of home-made implementation (v2) 2009-12-16 03:48:55 +00:00
vmlinux.lds.S parisc: fix unwind with recent gcc versions 2009-11-30 08:20:24 -08:00