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>

18 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index d75788feac6..8538b88eda3 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -24,6 +24,7 @@
 
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <asm/unaligned.h>
 
 #define ATOM_DEBUG
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index bd2e7aa85c1..438226a2290 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -23,6 +23,7 @@
  */
 #include <linux/firmware.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "radeon.h"
 #include "radeon_drm.h"
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 91eb762eb3f..a6e6f179b1d 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "radeon_drm.h"
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 4cef90cd74e..5eeb81061a2 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "radeon_reg.h"
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index c7593b8f58e..00bc77f2d20 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "radeon_reg.h"
 #include "radeon.h"
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index c5229019729..8ea3658eee9 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -25,6 +25,7 @@
  *          Alex Deucher
  *          Jerome Glisse
  */
+#include <linux/slab.h>
 #include <linux/seq_file.h>
 #include <linux/firmware.h>
 #include <linux/platform_device.h>
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
index 3f557c4151e..ed5dfe58f29 100644
--- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
+++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
@@ -7,6 +7,7 @@
  * ATPX support for both Intel/ATI
  */
 #include <linux/vga_switcheroo.h>
+#include <linux/slab.h>
 #include <acpi/acpi.h>
 #include <acpi/acpi_bus.h>
 #include <linux/pci.h>
diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c
index 55724046052..8ad71f70131 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -31,6 +31,7 @@
 #include "atom.h"
 
 #include <linux/vga_switcheroo.h>
+#include <linux/slab.h>
 /*
  * BIOS.
  */
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index e28e4ed5f72..0cc337edf3a 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/console.h>
+#include <linux/slab.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/radeon_drm.h>
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 8fccbf29235..9ac57a09784 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -28,6 +28,7 @@
      */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/fb.h>
 
 #include "drmP.h"
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 8495d4e32e1..d90f95b405c 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -33,6 +33,7 @@
 #include <linux/wait.h>
 #include <linux/list.h>
 #include <linux/kref.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "drm.h"
 #include "radeon_reg.h"
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 20ec276e759..d3657dcfdd2 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -31,6 +31,7 @@
 #include "radeon_drm.h"
 
 #include <linux/vga_switcheroo.h>
+#include <linux/slab.h>
 
 int radeon_driver_unload_kms(struct drm_device *dev)
 {
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index fc9d00ac6b1..ffce2c9e7c7 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -30,6 +30,7 @@
  *    Dave Airlie
  */
 #include <linux/list.h>
+#include <linux/slab.h>
 #include <drm/drmP.h>
 #include "radeon_drm.h"
 #include "radeon.h"
diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index e50513a6273..f6e1e8d4d98 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "radeon_drm.h"
 #include "radeon_reg.h"
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 43c5ab34b63..d031b686308 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -36,6 +36,7 @@
 #include <drm/drmP.h>
 #include <drm/radeon_drm.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "radeon_reg.h"
 #include "radeon.h"
 
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index 626d51891ee..273c7dcd454 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include <drm/drmP.h>
 #include "radeon.h"
 #include "rs400d.h"
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index bea747da123..903b1e496ba 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -26,6 +26,7 @@
  *          Jerome Glisse
  */
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "rv515d.h"
 #include "radeon.h"
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 37887dee12a..188e62d10f8 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -27,6 +27,7 @@
  */
 #include <linux/firmware.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include "drmP.h"
 #include "radeon.h"
 #include "radeon_drm.h"