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, 27 insertions, 3 deletions

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index 558bf3f..4afffe6 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/spinlock.h>
 #include <linux/atmel-ssc.h>
+#include <linux/slab.h>
 
 /* Serialize access to ssc_list and user count */
 static DEFINE_SPINLOCK(user_lock);
diff --git a/drivers/misc/atmel_pwm.c b/drivers/misc/atmel_pwm.c
index 6aa5294..0f3fb4f 100644
--- a/drivers/misc/atmel_pwm.c
+++ b/drivers/misc/atmel_pwm.c
@@ -1,6 +1,7 @@
 #include <linux/module.h>
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index 05dc8a3..3891124 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -6,6 +6,7 @@
 #include <linux/ioport.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 
 /* Number of bytes to reserve for the iomem resource */
 #define ATMEL_TC_IOMEM_SIZE	256
diff --git a/drivers/misc/c2port/core.c b/drivers/misc/c2port/core.c
index b7a85f4..ed090e7 100644
--- a/drivers/misc/c2port/core.c
+++ b/drivers/misc/c2port/core.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 
 #include <linux/c2port.h>
 
diff --git a/drivers/misc/cb710/core.c b/drivers/misc/cb710/core.c
index b14eab0..efec413 100644
--- a/drivers/misc/cb710/core.c
+++ b/drivers/misc/cb710/core.c
@@ -9,11 +9,11 @@
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/spinlock.h>
 #include <linux/idr.h>
 #include <linux/cb710.h>
+#include <linux/gfp.h>
 
 static DEFINE_IDA(cb710_ida);
 static DEFINE_SPINLOCK(cb710_ida_lock);
diff --git a/drivers/misc/cb710/debug.c b/drivers/misc/cb710/debug.c
index 02358d0..fcb3b8e 100644
--- a/drivers/misc/cb710/debug.c
+++ b/drivers/misc/cb710/debug.c
@@ -10,7 +10,6 @@
 #include <linux/cb710.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 
 #define CB710_REG_COUNT		0x80
 
diff --git a/drivers/misc/cs5535-mfgpt.c b/drivers/misc/cs5535-mfgpt.c
index 8110460..9bec24d 100644
--- a/drivers/misc/cs5535-mfgpt.c
+++ b/drivers/misc/cs5535-mfgpt.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/cs5535.h>
+#include <linux/slab.h>
 
 #define DRV_NAME "cs5535-mfgpt"
 #define MFGPT_BAR 2
diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c
index f3ee4a1..9197cfc 100644
--- a/drivers/misc/ds1682.c
+++ b/drivers/misc/ds1682.c
@@ -33,7 +33,6 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/string.h>
 #include <linux/list.h>
diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index 1eac626..48c84a5 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -27,6 +27,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 
 static LIST_HEAD(container_list);
 static DEFINE_MUTEX(container_list_lock);
diff --git a/drivers/misc/ep93xx_pwm.c b/drivers/misc/ep93xx_pwm.c
index ba46941..46b3439 100644
--- a/drivers/misc/ep93xx_pwm.c
+++ b/drivers/misc/ep93xx_pwm.c
@@ -19,6 +19,7 @@
 
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c
index a92a3a7..98ad012 100644
--- a/drivers/misc/hpilo.c
+++ b/drivers/misc/hpilo.c
@@ -25,6 +25,7 @@
 #include <linux/io.h>
 #include <linux/wait.h>
 #include <linux/poll.h>
+#include <linux/slab.h>
 #include "hpilo.h"
 
 static struct class *ilo_class;
diff --git a/drivers/misc/ibmasm/command.c b/drivers/misc/ibmasm/command.c
index e203173..5c766b4 100644
--- a/drivers/misc/ibmasm/command.c
+++ b/drivers/misc/ibmasm/command.c
@@ -23,6 +23,7 @@
  */
 
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include "ibmasm.h"
 #include "lowlevel.h"
 
diff --git a/drivers/misc/ibmasm/event.c b/drivers/misc/ibmasm/event.c
index 572d41f..76bfda1 100644
--- a/drivers/misc/ibmasm/event.c
+++ b/drivers/misc/ibmasm/event.c
@@ -23,6 +23,7 @@
  */
 
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include "ibmasm.h"
 #include "lowlevel.h"
 
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index aecf40e..8844a3f 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -75,6 +75,7 @@
 
 #include <linux/fs.h>
 #include <linux/pagemap.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include "ibmasm.h"
diff --git a/drivers/misc/ibmasm/module.c b/drivers/misc/ibmasm/module.c
index dc14b0b..a234d96 100644
--- a/drivers/misc/ibmasm/module.c
+++ b/drivers/misc/ibmasm/module.c
@@ -52,6 +52,7 @@
 
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include "ibmasm.h"
 #include "lowlevel.h"
 #include "remote.h"
diff --git a/drivers/misc/ics932s401.c b/drivers/misc/ics932s401.c
index 395a4ea..152e9d9 100644
--- a/drivers/misc/ics932s401.c
+++ b/drivers/misc/ics932s401.c
@@ -26,6 +26,7 @@
 #include <linux/mutex.h>
 #include <linux/delay.h>
 #include <linux/log2.h>
+#include <linux/slab.h>
 
 /* Addresses to scan */
 static const unsigned short normal_i2c[] = { 0x69, I2C_CLIENT_END };
diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
index 09dcb69..1932066 100644
--- a/drivers/misc/ioc4.c
+++ b/drivers/misc/ioc4.c
@@ -30,6 +30,7 @@
 #include <linux/pci.h>
 #include <linux/ioc4.h>
 #include <linux/ktime.h>
+#include <linux/slab.h>
 #include <linux/mutex.h>
 #include <linux/time.h>
 #include <asm/io.h>
diff --git a/drivers/misc/iwmc3200top/debugfs.c b/drivers/misc/iwmc3200top/debugfs.c
index 0c8ea0a1..e9eda47 100644
--- a/drivers/misc/iwmc3200top/debugfs.c
+++ b/drivers/misc/iwmc3200top/debugfs.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/mmc/sdio_func.h>
diff --git a/drivers/misc/iwmc3200top/fw-download.c b/drivers/misc/iwmc3200top/fw-download.c
index 9dbaeb5..e27afde 100644
--- a/drivers/misc/iwmc3200top/fw-download.c
+++ b/drivers/misc/iwmc3200top/fw-download.c
@@ -26,6 +26,7 @@
 
 #include <linux/firmware.h>
 #include <linux/mmc/sdio_func.h>
+#include <linux/slab.h>
 #include <asm/unaligned.h>
 
 #include "iwmc3200top.h"
diff --git a/drivers/misc/iwmc3200top/log.c b/drivers/misc/iwmc3200top/log.c
index d569279..a36a55a 100644
--- a/drivers/misc/iwmc3200top/log.c
+++ b/drivers/misc/iwmc3200top/log.c
@@ -26,6 +26,7 @@
 
 #include <linux/kernel.h>
 #include <linux/mmc/sdio_func.h>
+#include <linux/slab.h>
 #include <linux/ctype.h>
 #include "fw-msg.h"
 #include "iwmc3200top.h"
diff --git a/drivers/misc/iwmc3200top/main.c b/drivers/misc/iwmc3200top/main.c
index 3b7292a..c73cef2 100644
--- a/drivers/misc/iwmc3200top/main.c
+++ b/drivers/misc/iwmc3200top/main.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/debugfs.h>
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index 4a06483..31a9911 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -40,6 +40,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/hrtimer.h>
+#include <linux/slab.h>
 #include <scsi/scsi_cmnd.h>
 #include <linux/debugfs.h>
 
diff --git a/drivers/misc/phantom.c b/drivers/misc/phantom.c
index 779aa8e..75ee0d3 100644
--- a/drivers/misc/phantom.c
+++ b/drivers/misc/phantom.c
@@ -21,6 +21,7 @@
 #include <linux/poll.h>
 #include <linux/interrupt.h>
 #include <linux/cdev.h>
+#include <linux/slab.h>
 #include <linux/phantom.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 832ed4c..8d082b4 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -44,6 +44,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/sysctl.h>
 #include <linux/device.h>
 #include <linux/delay.h>
diff --git a/drivers/misc/sgi-xp/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c
index 9a6268c..d551f09 100644
--- a/drivers/misc/sgi-xp/xpc_partition.c
+++ b/drivers/misc/sgi-xp/xpc_partition.c
@@ -17,6 +17,7 @@
 
 #include <linux/device.h>
 #include <linux/hardirq.h>
+#include <linux/slab.h>
 #include "xpc.h"
 #include <asm/uv/uv_hub.h>
 
diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c
index 8b70e03..7d71c04 100644
--- a/drivers/misc/sgi-xp/xpc_sn2.c
+++ b/drivers/misc/sgi-xp/xpc_sn2.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include <asm/uncached.h>
 #include <asm/sn/mspec.h>
 #include <asm/sn/sn_sal.h>
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 8725d5e..1f59ee2 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -19,6 +19,7 @@
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include <asm/uv/uv_hub.h>
 #if defined CONFIG_X86_64
 #include <asm/uv/bios.h>
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index 57b152f..ee5109a 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -20,6 +20,7 @@
  *
  */
 
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index 98bcba5..5f6852d 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/tifm.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/idr.h>