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>

29 files changed, 29 insertions, 0 deletions

diff --git a/drivers/uwb/address.c b/drivers/uwb/address.c
index ad21b1d7218c..973321327c44 100644
--- a/drivers/uwb/address.c
+++ b/drivers/uwb/address.c
@@ -23,6 +23,7 @@
  * FIXME: docs
  */
 
+#include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/device.h>
diff --git a/drivers/uwb/allocator.c b/drivers/uwb/allocator.c
index c13cec7dcbc5..436e4f7110cb 100644
--- a/drivers/uwb/allocator.c
+++ b/drivers/uwb/allocator.c
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/uwb.h>
 
 #include "uwb-internal.h"
diff --git a/drivers/uwb/beacon.c b/drivers/uwb/beacon.c
index 36bc3158006f..dcdd59bfcd09 100644
--- a/drivers/uwb/beacon.c
+++ b/drivers/uwb/beacon.c
@@ -28,6 +28,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/kdev_t.h>
+#include <linux/slab.h>
 
 #include "uwb-internal.h"
 
diff --git a/drivers/uwb/drp-ie.c b/drivers/uwb/drp-ie.c
index 2840d7bf9e67..520673109a7e 100644
--- a/drivers/uwb/drp-ie.c
+++ b/drivers/uwb/drp-ie.c
@@ -18,6 +18,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/random.h>
+#include <linux/slab.h>
 #include <linux/uwb.h>
 
 #include "uwb-internal.h"
diff --git a/drivers/uwb/drp.c b/drivers/uwb/drp.c
index 4f5ca99a04b9..a8d83e25e3b6 100644
--- a/drivers/uwb/drp.c
+++ b/drivers/uwb/drp.c
@@ -20,6 +20,7 @@
  */
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include "uwb-internal.h"
 
diff --git a/drivers/uwb/est.c b/drivers/uwb/est.c
index 328fcc2b6099..a2eaa3c33b0b 100644
--- a/drivers/uwb/est.c
+++ b/drivers/uwb/est.c
@@ -40,6 +40,7 @@
  *   uwb_est_get_size()
  */
 #include <linux/spinlock.h>
+#include <linux/slab.h>
 
 #include "uwb-internal.h"
 
diff --git a/drivers/uwb/hwa-rc.c b/drivers/uwb/hwa-rc.c
index b409c228f254..2babcd4fbfc1 100644
--- a/drivers/uwb/hwa-rc.c
+++ b/drivers/uwb/hwa-rc.c
@@ -53,6 +53,7 @@
  */
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/usb/wusb.h>
 #include <linux/usb/wusb-wa.h>
diff --git a/drivers/uwb/i1480/dfu/mac.c b/drivers/uwb/i1480/dfu/mac.c
index 694d0daf88ab..6ec14f5fcde4 100644
--- a/drivers/uwb/i1480/dfu/mac.c
+++ b/drivers/uwb/i1480/dfu/mac.c
@@ -28,6 +28,7 @@
  */
 #include <linux/delay.h>
 #include <linux/firmware.h>
+#include <linux/slab.h>
 #include <linux/uwb.h>
 #include "i1480-dfu.h"
 
diff --git a/drivers/uwb/i1480/dfu/usb.c b/drivers/uwb/i1480/dfu/usb.c
index a99e211a1b87..ba8664328afa 100644
--- a/drivers/uwb/i1480/dfu/usb.c
+++ b/drivers/uwb/i1480/dfu/usb.c
@@ -37,6 +37,7 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 #include <linux/interrupt.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/uwb.h>
 #include <linux/usb/wusb.h>
diff --git a/drivers/uwb/i1480/i1480u-wlp/lc.c b/drivers/uwb/i1480/i1480u-wlp/lc.c
index f272dfe54d49..def778cf2216 100644
--- a/drivers/uwb/i1480/i1480u-wlp/lc.c
+++ b/drivers/uwb/i1480/i1480u-wlp/lc.c
@@ -55,6 +55,7 @@
  *                          is being removed.
  *         i1480u_rm()
  */
+#include <linux/gfp.h>
 #include <linux/if_arp.h>
 #include <linux/etherdevice.h>
 
diff --git a/drivers/uwb/i1480/i1480u-wlp/netdev.c b/drivers/uwb/i1480/i1480u-wlp/netdev.c
index b236e6969942..f98f6ce8b9e7 100644
--- a/drivers/uwb/i1480/i1480u-wlp/netdev.c
+++ b/drivers/uwb/i1480/i1480u-wlp/netdev.c
@@ -39,6 +39,7 @@
  *     i1480u_set_config():
  */
 
+#include <linux/slab.h>
 #include <linux/if_arp.h>
 #include <linux/etherdevice.h>
 
diff --git a/drivers/uwb/i1480/i1480u-wlp/rx.c b/drivers/uwb/i1480/i1480u-wlp/rx.c
index 25a2758beb61..d4e51e108aa4 100644
--- a/drivers/uwb/i1480/i1480u-wlp/rx.c
+++ b/drivers/uwb/i1480/i1480u-wlp/rx.c
@@ -64,6 +64,7 @@
  *
  */
 
+#include <linux/gfp.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include "i1480u-wlp.h"
diff --git a/drivers/uwb/i1480/i1480u-wlp/tx.c b/drivers/uwb/i1480/i1480u-wlp/tx.c
index 3db3449dbda4..3c117a364564 100644
--- a/drivers/uwb/i1480/i1480u-wlp/tx.c
+++ b/drivers/uwb/i1480/i1480u-wlp/tx.c
@@ -54,6 +54,7 @@
  *          the times the MTU will be smaller than one page...
  */
 
+#include <linux/slab.h>
 #include "i1480u-wlp.h"
 
 enum {
diff --git a/drivers/uwb/ie.c b/drivers/uwb/ie.c
index ab976686175b..30acec740425 100644
--- a/drivers/uwb/ie.c
+++ b/drivers/uwb/ie.c
@@ -24,6 +24,7 @@
  * FIXME: docs
  */
 
+#include <linux/slab.h>
 #include "uwb-internal.h"
 
 /**
diff --git a/drivers/uwb/lc-dev.c b/drivers/uwb/lc-dev.c
index 1097e81b56d0..90113bafefca 100644
--- a/drivers/uwb/lc-dev.c
+++ b/drivers/uwb/lc-dev.c
@@ -23,6 +23,7 @@
  * FIXME: docs
  */
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/kdev_t.h>
diff --git a/drivers/uwb/lc-rc.c b/drivers/uwb/lc-rc.c
index 9611ef3b787a..b0091c771b9a 100644
--- a/drivers/uwb/lc-rc.c
+++ b/drivers/uwb/lc-rc.c
@@ -35,6 +35,7 @@
 #include <linux/kdev_t.h>
 #include <linux/etherdevice.h>
 #include <linux/usb.h>
+#include <linux/slab.h>
 
 #include "uwb-internal.h"
 
diff --git a/drivers/uwb/neh.c b/drivers/uwb/neh.c
index 78510a1f410d..697e56a5bcdd 100644
--- a/drivers/uwb/neh.c
+++ b/drivers/uwb/neh.c
@@ -83,6 +83,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/timer.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 
 #include "uwb-internal.h"
diff --git a/drivers/uwb/reset.c b/drivers/uwb/reset.c
index 7f0512e43d9d..27849292b552 100644
--- a/drivers/uwb/reset.c
+++ b/drivers/uwb/reset.c
@@ -30,6 +30,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include <linux/delay.h>
 
 #include "uwb-internal.h"
diff --git a/drivers/uwb/rsv.c b/drivers/uwb/rsv.c
index 6b76f4bb4cc7..78c892233cf1 100644
--- a/drivers/uwb/rsv.c
+++ b/drivers/uwb/rsv.c
@@ -17,6 +17,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/uwb.h>
+#include <linux/slab.h>
 #include <linux/random.h>
 
 #include "uwb-internal.h"
diff --git a/drivers/uwb/scan.c b/drivers/uwb/scan.c
index 2d270748f32b..76a1a1ed7d3e 100644
--- a/drivers/uwb/scan.c
+++ b/drivers/uwb/scan.c
@@ -35,6 +35,7 @@
 
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include "uwb-internal.h"
 
 
diff --git a/drivers/uwb/umc-dev.c b/drivers/uwb/umc-dev.c
index 1fc7d8270bb8..43ea9982e687 100644
--- a/drivers/uwb/umc-dev.c
+++ b/drivers/uwb/umc-dev.c
@@ -6,6 +6,7 @@
  * This file is released under the GNU GPL v2.
  */
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/uwb/umc.h>
 
 static void umc_device_release(struct device *dev)
diff --git a/drivers/uwb/uwbd.c b/drivers/uwb/uwbd.c
index 6210fe1fd1bb..001c8b4020a8 100644
--- a/drivers/uwb/uwbd.c
+++ b/drivers/uwb/uwbd.c
@@ -69,6 +69,7 @@
  * Handler functions are called normally uwbd_evt_handle_*().
  */
 #include <linux/kthread.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/freezer.h>
 
diff --git a/drivers/uwb/whc-rc.c b/drivers/uwb/whc-rc.c
index 01950c62dc8d..73495583c444 100644
--- a/drivers/uwb/whc-rc.c
+++ b/drivers/uwb/whc-rc.c
@@ -45,6 +45,7 @@
 #include <linux/sched.h>
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
+#include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/uwb.h>
 #include <linux/uwb/whci.h>
diff --git a/drivers/uwb/whci.c b/drivers/uwb/whci.c
index 2e2784627ad6..b221142446a2 100644
--- a/drivers/uwb/whci.c
+++ b/drivers/uwb/whci.c
@@ -9,6 +9,7 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
+#include <linux/slab.h>
 #include <linux/uwb/whci.h>
 #include <linux/uwb/umc.h>
 
diff --git a/drivers/uwb/wlp/eda.c b/drivers/uwb/wlp/eda.c
index 69e020039718..086fc0cf9401 100644
--- a/drivers/uwb/wlp/eda.c
+++ b/drivers/uwb/wlp/eda.c
@@ -53,6 +53,7 @@
 
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/slab.h>
 #include <linux/wlp.h>
 #include "wlp-internal.h"
 
diff --git a/drivers/uwb/wlp/messages.c b/drivers/uwb/wlp/messages.c
index 75164866c2d8..3a8e033dce21 100644
--- a/drivers/uwb/wlp/messages.c
+++ b/drivers/uwb/wlp/messages.c
@@ -24,6 +24,7 @@
  */
 
 #include <linux/wlp.h>
+#include <linux/slab.h>
 
 #include "wlp-internal.h"
 
diff --git a/drivers/uwb/wlp/txrx.c b/drivers/uwb/wlp/txrx.c
index 7350ed6909f8..05dde44b3592 100644
--- a/drivers/uwb/wlp/txrx.c
+++ b/drivers/uwb/wlp/txrx.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/etherdevice.h>
+#include <linux/slab.h>
 #include <linux/wlp.h>
 
 #include "wlp-internal.h"
diff --git a/drivers/uwb/wlp/wlp-lc.c b/drivers/uwb/wlp/wlp-lc.c
index 13db739c4e39..7f6a630bf26c 100644
--- a/drivers/uwb/wlp/wlp-lc.c
+++ b/drivers/uwb/wlp/wlp-lc.c
@@ -22,6 +22,7 @@
  * FIXME: docs
  */
 #include <linux/wlp.h>
+#include <linux/slab.h>
 
 #include "wlp-internal.h"
 
diff --git a/drivers/uwb/wlp/wss-lc.c b/drivers/uwb/wlp/wss-lc.c
index 5913c7a5d922..90accdd54c07 100644
--- a/drivers/uwb/wlp/wss-lc.c
+++ b/drivers/uwb/wlp/wss-lc.c
@@ -45,6 +45,7 @@
  */
 #include <linux/etherdevice.h> /* for is_valid_ether_addr */
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 #include <linux/wlp.h>
 
 #include "wlp-internal.h"