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>

30 files changed, 30 insertions, 0 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index b6ed60b57b0d..56205a0b85df 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -25,6 +25,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #ifdef CONFIG_ACPI_PROCFS_POWER
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 3597d73f28f6..d98571385656 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -30,6 +30,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/memory_hotplug.h>
+#include <linux/slab.h>
 #include <acpi/acpi_drivers.h>
 
 #define ACPI_MEMORY_DEVICE_CLASS                "memory"
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 7e52295f1ecc..19dacfd43163 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -27,6 +27,7 @@
 #include <linux/freezer.h>
 #include <linux/cpu.h>
 #include <linux/clockchips.h>
+#include <linux/slab.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 75f39f2c166d..5717bd300869 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -32,6 +32,7 @@
 #include <linux/jiffies.h>
 #include <linux/async.h>
 #include <linux/dmi.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_ACPI_PROCFS_POWER
 #include <linux/proc_fs.h>
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b70cd3756142..37132dc2da03 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -32,6 +32,7 @@
 #include <linux/device.h>
 #include <linux/proc_fs.h>
 #include <linux/acpi.h>
+#include <linux/slab.h>
 #ifdef CONFIG_X86
 #include <asm/mpspec.h>
 #endif
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index f53fbe307c9d..fd51c4ab4829 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -30,6 +30,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/input.h>
+#include <linux/slab.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 5faf6c21257d..45cd03b4630e 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -29,6 +29,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/acpi.h>
 #include <acpi/acpi_bus.h>
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index cc421b7ae166..146135e7a6a1 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -9,6 +9,7 @@
 #include <linux/kernel.h>
 #include <linux/moduleparam.h>
 #include <linux/debugfs.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 #include <acpi/acpi_drivers.h>
 
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index d9a85f1ddde6..a9c429c5d50f 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -24,6 +24,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/notifier.h>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 1ac28c6a672e..35ba2547f544 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -39,6 +39,7 @@
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
+#include <linux/slab.h>
 #include <asm/io.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index c511071bfd79..d439314a75d8 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -10,6 +10,7 @@
 #include <linux/proc_fs.h>
 #include <linux/init.h>
 #include <linux/poll.h>
+#include <linux/gfp.h>
 #include <acpi/acpi_drivers.h>
 #include <net/netlink.h>
 #include <net/genetlink.h>
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 6d5b64b7d526..4af6301601e7 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/list.h>
 #include <linux/device.h>
+#include <linux/slab.h>
 #include <linux/rwsem.h>
 #include <linux/acpi.h>
 
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 843699ed93f2..b0a71ecee682 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -37,6 +37,7 @@
 #include <linux/pm.h>
 #include <linux/pci.h>
 #include <linux/acpi.h>
+#include <linux/slab.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 04b0f007c9b7..8d47a5846aeb 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -39,6 +39,7 @@
 #include <linux/pm.h>
 #include <linux/pci.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index d724736d56c8..aefce33f2a09 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -34,6 +34,7 @@
 #include <linux/pci.h>
 #include <linux/pci-acpi.h>
 #include <linux/acpi.h>
+#include <linux/slab.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c
index 11f219743204..07f7fea8a4e2 100644
--- a/drivers/acpi/pci_slot.c
+++ b/drivers/acpi/pci_slot.c
@@ -26,6 +26,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/acpi.h>
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 0f30c3c1eea4..ddc76787b842 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -39,6 +39,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <acpi/acpi_bus.h>
diff --git a/drivers/acpi/power_meter.c b/drivers/acpi/power_meter.c
index 834c5af0de4b..e8c32a49f14e 100644
--- a/drivers/acpi/power_meter.c
+++ b/drivers/acpi/power_meter.c
@@ -25,6 +25,7 @@
 #include <linux/jiffies.h>
 #include <linux/mutex.h>
 #include <linux/dmi.h>
+#include <linux/slab.h>
 #include <linux/kdev_t.h>
 #include <linux/sched.h>
 #include <linux/time.h>
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 791ac7b0f8df..51284351418f 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -8,6 +8,7 @@
  *      - Added _PDC for platforms with Intel CPUs
  */
 #include <linux/dmi.h>
+#include <linux/slab.h>
 
 #include <acpi/acpi_drivers.h>
 #include <acpi/processor.h>
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index b5658cdce27f..5675d9747e87 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -45,6 +45,7 @@
 #include <linux/dmi.h>
 #include <linux/moduleparam.h>
 #include <linux/cpuidle.h>
+#include <linux/slab.h>
 
 #include <asm/io.h>
 #include <asm/system.h>
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 37dfce749398..5939e7f7d8e9 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/cpufreq.h>
+#include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/acpi.h>
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index d648a9860b88..ba1bd263d903 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -30,6 +30,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/cpufreq.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_X86
 #include <asm/cpufeature.h>
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 29c6f5766dcf..9ade1a5b32ed 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -28,6 +28,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/cpufreq.h>
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 89ad11138e48..4ff76e8174eb 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index fd09229282ea..36704b887ccf 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -11,6 +11,7 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include <linux/wait.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include "sbshc.h"
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 189cbc2585fa..0261b116d051 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -4,6 +4,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/acpi.h>
 #include <linux/signal.h>
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 743f2445e2a1..4aaf24976138 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -25,6 +25,7 @@
 
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/string.h>
 #include <asm/uaccess.h>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5d3893558cf7..efad1f33aeb5 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -35,6 +35,7 @@
 #include <linux/module.h>
 #include <linux/dmi.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/jiffies.h>
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index c9a49f4747e6..b002a471c5d4 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -25,6 +25,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <acpi/acpi_bus.h>
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index cbe6f3924a10..6a0143796772 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -39,6 +39,7 @@
 #include <linux/sort.h>
 #include <linux/pci.h>
 #include <linux/pci_ids.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 #include <linux/dmi.h>
 #include <acpi/acpi_bus.h>