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>

26 files changed, 26 insertions, 0 deletions

diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index f79bdfe4bed9..75a256f3d45b 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/list.h>
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index c7cb87a6fee2..699695128e33 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -62,6 +62,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <linux/slab.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
diff --git a/drivers/usb/gadget/config.c b/drivers/usb/gadget/config.c
index e1191b9a316a..47e8e722682c 100644
--- a/drivers/usb/gadget/config.c
+++ b/drivers/usb/gadget/config.c
@@ -19,6 +19,7 @@
  */
 
 #include <linux/errno.h>
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/string.h>
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index e49c7325dce2..400e1ebe6976 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -14,6 +14,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_audio.c b/drivers/usb/gadget/f_audio.c
index f1e3aad76c37..43bf44514c41 100644
--- a/drivers/usb/gadget/f_audio.c
+++ b/drivers/usb/gadget/f_audio.c
@@ -9,6 +9,7 @@
  * Licensed under the GPL-2 or later.
  */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <asm/atomic.h>
diff --git a/drivers/usb/gadget/f_ecm.c b/drivers/usb/gadget/f_ecm.c
index 2fff530efc19..4e595324c614 100644
--- a/drivers/usb/gadget/f_ecm.c
+++ b/drivers/usb/gadget/f_ecm.c
@@ -21,6 +21,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/etherdevice.h>
diff --git a/drivers/usb/gadget/f_eem.c b/drivers/usb/gadget/f_eem.c
index d4f0db58a8ad..38226e9a371d 100644
--- a/drivers/usb/gadget/f_eem.c
+++ b/drivers/usb/gadget/f_eem.c
@@ -24,6 +24,7 @@
 #include <linux/device.h>
 #include <linux/etherdevice.h>
 #include <linux/crc32.h>
+#include <linux/slab.h>
 
 #include "u_ether.h"
 
diff --git a/drivers/usb/gadget/f_loopback.c b/drivers/usb/gadget/f_loopback.c
index 6cb29d3df575..e91d1b16d9be 100644
--- a/drivers/usb/gadget/f_loopback.c
+++ b/drivers/usb/gadget/f_loopback.c
@@ -21,6 +21,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_obex.c b/drivers/usb/gadget/f_obex.c
index b4a3ba654ea5..8f8c64371475 100644
--- a/drivers/usb/gadget/f_obex.c
+++ b/drivers/usb/gadget/f_obex.c
@@ -23,6 +23,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c
index d2de10b9dc4b..3c6e1a058745 100644
--- a/drivers/usb/gadget/f_phonet.c
+++ b/drivers/usb/gadget/f_phonet.c
@@ -20,6 +20,7 @@
  * 02110-1301 USA
  */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c
index a30e60c7f129..56b022150f22 100644
--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -24,6 +24,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/etherdevice.h>
diff --git a/drivers/usb/gadget/f_serial.c b/drivers/usb/gadget/f_serial.c
index db0aa93606ef..490b00b01a7d 100644
--- a/drivers/usb/gadget/f_serial.c
+++ b/drivers/usb/gadget/f_serial.c
@@ -10,6 +10,7 @@
  * either version 2 of that License or (at your option) any later version.
  */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index 09cba273d2db..6d3cc443d914 100644
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -21,6 +21,7 @@
 
 /* #define VERBOSE_DEBUG */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/f_subset.c b/drivers/usb/gadget/f_subset.c
index a9c98fdb626d..8675ca415329 100644
--- a/drivers/usb/gadget/f_subset.c
+++ b/drivers/usb/gadget/f_subset.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/etherdevice.h>
diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c
index 04f6224b7e06..2b56ce621852 100644
--- a/drivers/usb/gadget/gmidi.c
+++ b/drivers/usb/gadget/gmidi.c
@@ -21,6 +21,7 @@
 /* #define VERBOSE_DEBUG */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/utsname.h>
 #include <linux/device.h>
 
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 01ee0b9bc957..e743122fcd93 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -29,6 +29,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/timer.h>
+#include <linux/slab.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
diff --git a/drivers/usb/gadget/lh7a40x_udc.c b/drivers/usb/gadget/lh7a40x_udc.c
index 6cd3d54f5640..fded3fca793b 100644
--- a/drivers/usb/gadget/lh7a40x_udc.c
+++ b/drivers/usb/gadget/lh7a40x_udc.c
@@ -22,6 +22,7 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 
 #include "lh7a40x_udc.h"
 
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index a8c8543d1b08..166bf71fd348 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -25,6 +25,7 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 05b892c3d686..85b0d8921eae 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -31,6 +31,7 @@
 #include <linux/clk.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 #include <asm/byteorder.h>
 #include <mach/hardware.h>
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 5e13d23b5f0c..e848ecb896fd 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -28,6 +28,7 @@
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
diff --git a/drivers/usb/gadget/rndis.c b/drivers/usb/gadget/rndis.c
index 48267bc0b2e0..5c0d06c79a81 100644
--- a/drivers/usb/gadget/rndis.c
+++ b/drivers/usb/gadget/rndis.c
@@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/list.h>
 #include <linux/proc_fs.h>
+#include <linux/slab.h>
 #include <linux/seq_file.h>
 #include <linux/netdevice.h>
 
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index f742c8e7397c..124a8ccfdcda 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -22,6 +22,7 @@
 #include <linux/seq_file.h>
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
diff --git a/drivers/usb/gadget/u_audio.c b/drivers/usb/gadget/u_audio.c
index 35e0930f5bbb..7a86d2c9109c 100644
--- a/drivers/usb/gadget/u_audio.c
+++ b/drivers/usb/gadget/u_audio.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/ctype.h>
diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c
index 84ca195c2d10..07f4178ad178 100644
--- a/drivers/usb/gadget/u_ether.c
+++ b/drivers/usb/gadget/u_ether.c
@@ -23,6 +23,7 @@
 /* #define VERBOSE_DEBUG */
 
 #include <linux/kernel.h>
+#include <linux/gfp.h>
 #include <linux/device.h>
 #include <linux/ctype.h>
 #include <linux/etherdevice.h>
diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index adf8260c3a6a..16bdf77f582a 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -23,6 +23,7 @@
 #include <linux/delay.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
+#include <linux/slab.h>
 
 #include "u_serial.h"
 
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index fac81ee193dd..807280d069f9 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -50,6 +50,7 @@
 /* #define VERBOSE_DEBUG */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/utsname.h>
 #include <linux/device.h>