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>

64 files changed, 61 insertions, 3 deletions

diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index d68888fe3df..ba38e014722 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -33,6 +33,7 @@
 
 #include "drmP.h"
 #include <linux/module.h>
+#include <linux/slab.h>
 
 #if __OS_HAS_AGP
 
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index 8417cc4c43f..f7ba82ebf65 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -34,6 +34,7 @@
  */
 
 #include <linux/vmalloc.h>
+#include <linux/slab.h>
 #include <linux/log2.h>
 #include <asm/shmparam.h>
 #include "drmP.h"
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index d91fb8c0b7b..61b9bcfdf04 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -30,6 +30,7 @@
  *      Jesse Barnes <jesse.barnes@intel.com>
  */
 #include <linux/list.h>
+#include <linux/slab.h>
 #include "drm.h"
 #include "drmP.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index 9903f270e44..677b275fa72 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -32,6 +32,7 @@
 
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 
 #if defined(CONFIG_DEBUG_FS)
diff --git a/drivers/gpu/drm/drm_dp_i2c_helper.c b/drivers/gpu/drm/drm_dp_i2c_helper.c
index 548887c8506..f7eba0a0973 100644
--- a/drivers/gpu/drm/drm_dp_i2c_helper.c
+++ b/drivers/gpu/drm/drm_dp_i2c_helper.c
@@ -23,7 +23,6 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/delay.h>
-#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index f3c58e2bd75..4a66201edae 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -47,6 +47,7 @@
  */
 
 #include <linux/debugfs.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm_core.h"
 
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index f97e7c42ac8..d196d7ec990 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -27,6 +27,7 @@
  * DEALINGS IN THE SOFTWARE.
  */
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 #include "drmP.h"
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 50549703584..85cdf052e45 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -29,6 +29,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/sysrq.h>
+#include <linux/slab.h>
 #include <linux/fb.h>
 #include "drmP.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 08d14df3bb4..0d55552e130 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -36,6 +36,7 @@
 
 #include "drmP.h"
 #include <linux/poll.h>
+#include <linux/slab.h>
 #include <linux/smp_lock.h>
 
 static int drm_open_helper(struct inode *inode, struct file *filp,
diff --git a/drivers/gpu/drm/drm_hashtab.c b/drivers/gpu/drm/drm_hashtab.c
index f36b21c5b2e..a93d7b4ddaa 100644
--- a/drivers/gpu/drm/drm_hashtab.c
+++ b/drivers/gpu/drm/drm_hashtab.c
@@ -35,6 +35,7 @@
 #include "drmP.h"
 #include "drm_hashtab.h"
 #include <linux/hash.h>
+#include <linux/slab.h>
 
 int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
 {
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index b98384dbd9a..3bd87276156 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -36,6 +36,7 @@
 #include "drmP.h"
 
 #include <linux/interrupt.h>	/* For task queue support */
+#include <linux/slab.h>
 
 #include <linux/vgaarb.h>
 /**
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index e68ebf92fa2..2ea9ad4a8d6 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -37,6 +37,7 @@
  */
 
 #include <linux/pci.h>
+#include <linux/slab.h>
 #include <linux/dma-mapping.h>
 #include "drmP.h"
 
diff --git a/drivers/gpu/drm/drm_proc.c b/drivers/gpu/drm/drm_proc.c
index d379c4f2892..a9ba6b69ad3 100644
--- a/drivers/gpu/drm/drm_proc.c
+++ b/drivers/gpu/drm/drm_proc.c
@@ -38,6 +38,7 @@
  */
 
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 
 /***************************************************
diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
index c7823c863d4..9034c4c6100 100644
--- a/drivers/gpu/drm/drm_scatter.c
+++ b/drivers/gpu/drm/drm_scatter.c
@@ -32,6 +32,7 @@
  */
 
 #include <linux/vmalloc.h>
+#include <linux/slab.h>
 #include "drmP.h"
 
 #define DEBUG_SCATTER 0
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index ad73e141afd..b743411d814 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -33,6 +33,7 @@
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm_core.h"
 
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 014ce24761b..1a1825b29f5 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -14,6 +14,7 @@
 
 #include <linux/device.h>
 #include <linux/kdev_t.h>
+#include <linux/gfp.h>
 #include <linux/err.h>
 
 #include "drm_sysfs.h"
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index 4ac900f4647..c3b13fb41d0 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -36,6 +36,7 @@
 #include "drmP.h"
 #if defined(__ia64__)
 #include <linux/efi.h>
+#include <linux/slab.h>
 #endif
 
 static void drm_vm_open(struct vm_area_struct *vma);
diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index de32d22a8c3..997d91707ad 100644
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -36,6 +36,7 @@
 #include "i810_drv.h"
 #include <linux/interrupt.h>	/* For task queue support */
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include <linux/pagemap.h>
 
 #define I810_BUF_FREE		2
diff --git a/drivers/gpu/drm/i830/i830_dma.c b/drivers/gpu/drm/i830/i830_dma.c
index 06bd732e646..65759a9a85c 100644
--- a/drivers/gpu/drm/i830/i830_dma.c
+++ b/drivers/gpu/drm/i830/i830_dma.c
@@ -38,6 +38,7 @@
 #include <linux/interrupt.h>	/* For task queue support */
 #include <linux/pagemap.h>
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 
 #define I830_BUF_FREE		2
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 1376dfe44c9..b574503dddd 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -28,6 +28,7 @@
 
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index a9f8589490c..2dc93939507 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -38,6 +38,7 @@
 #include <linux/acpi.h>
 #include <linux/pnp.h>
 #include <linux/vga_switcheroo.h>
+#include <linux/slab.h>
 
 /* Really want an OS-independent resettable timer.  Would like to have
  * this loop run for (eg) 3 sec, but have the timer reset every time
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 933e865a892..368d726853d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -31,6 +31,7 @@
 #include "i915_drv.h"
 #include "i915_trace.h"
 #include "intel_drv.h"
+#include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/pci.h>
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 5388354da0d..49c458bc650 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -27,6 +27,7 @@
  */
 
 #include <linux/sysrq.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index fccf07470c8..38110ce742a 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 58fc7fa0eb1..e7e753b2845 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -28,6 +28,7 @@
 #include <linux/input.h>
 #include <linux/i2c.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "intel_drv.h"
 #include "i915_drm.h"
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 3ef3a0d0edd..8e283f75941 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -26,6 +26,7 @@
  */
 
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index a4d2606de77..0427ca5a251 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -25,6 +25,7 @@
  *	Eric Anholt <eric@anholt.net>
  */
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 8cd791dc5b2..69bbef92f13 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -30,7 +30,6 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
-#include <linux/slab.h>
 #include <linux/sysrq.h>
 #include <linux/delay.h>
 #include <linux/fb.h>
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index a30f8bfc198..1ed02f64125 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -27,6 +27,7 @@
  */
 
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include "drmP.h"
 #include "drm.h"
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index fcc753ca5d9..c2649c7df14 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -26,6 +26,7 @@
  *	Eric Anholt <eric@anholt.net>
  */
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/i2c-id.h>
 #include <linux/i2c-algo-bit.h>
 #include "drmP.h"
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 2b3fa7a3c02..216e9f52b6e 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -30,6 +30,7 @@
 #include <acpi/button.h>
 #include <linux/dmi.h>
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
diff --git a/drivers/gpu/drm/i915/intel_modes.c b/drivers/gpu/drm/i915/intel_modes.c
index 67e2f4632a2..89d303d1d3f 100644
--- a/drivers/gpu/drm/i915/intel_modes.c
+++ b/drivers/gpu/drm/i915/intel_modes.c
@@ -23,6 +23,7 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/fb.h>
 #include "drmP.h"
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 48daee5c9c6..26e13a0bf30 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -26,6 +26,7 @@
  *	Eric Anholt <eric@anholt.net>
  */
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include "drmP.h"
 #include "drm.h"
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 0e0730a5313..e13f6af0037 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -1,5 +1,6 @@
 #include <linux/pci.h>
 #include <linux/acpi.h>
+#include <linux/slab.h>
 #include <acpi/acpi_drivers.h>
 #include <acpi/acpi_bus.h>
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/