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>

32 files changed, 31 insertions, 1 deletions

diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c
index c37e12bf3004..4a6e7186334e 100644
--- a/drivers/mfd/88pm860x-i2c.c
+++ b/drivers/mfd/88pm860x-i2c.c
@@ -13,6 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/mfd/88pm860x.h>
+#include <linux/slab.h>
 
 static inline int pm860x_read_device(struct i2c_client *i2c,
 				     int reg, int bytes, void *dest)
diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index a2ce3b6af4a2..e4ca5909e424 100644
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -10,6 +10,7 @@
 #include <linux/mutex.h>
 #include <linux/list.h>
 #include <linux/notifier.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/device.h>
diff --git a/drivers/mfd/ab3100-otp.c b/drivers/mfd/ab3100-otp.c
index b603469dff69..2d14655fdebd 100644
--- a/drivers/mfd/ab3100-otp.c
+++ b/drivers/mfd/ab3100-otp.c
@@ -9,6 +9,7 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/ab3100.h>
diff --git a/drivers/mfd/ab4500-core.c b/drivers/mfd/ab4500-core.c
index 1c44c19e073a..c275daa3ab1a 100644
--- a/drivers/mfd/ab4500-core.c
+++ b/drivers/mfd/ab4500-core.c
@@ -15,6 +15,7 @@
  * Interrupt management to be added - TODO.
  */
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
diff --git a/drivers/mfd/adp5520.c b/drivers/mfd/adp5520.c
index b26644772d02..005532865654 100644
--- a/drivers/mfd/adp5520.c
+++ b/drivers/mfd/adp5520.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/err.h>
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index 95c1e6bd1729..7de708d15d72 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -21,6 +21,7 @@
 #include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
 
diff --git a/drivers/mfd/da903x.c b/drivers/mfd/da903x.c
index e5ffe5617393..67181b147ab3 100644
--- a/drivers/mfd/da903x.c
+++ b/drivers/mfd/da903x.c
@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/mfd/da903x.h>
+#include <linux/slab.h>
 
 #define DA9030_CHIP_ID		0x00
 #define DA9030_EVENT_A		0x01
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index df405af968fa..134c69aa4790 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -18,6 +18,7 @@
 #include <linux/mfd/ezx-pcap.h>
 #include <linux/spi/spi.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 #define PCAP_ADC_MAXQ		8
 struct pcap_adc_request {
diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c
index addb846c1e34..d3e74f8585e0 100644
--- a/drivers/mfd/htc-egpio.c
+++ b/drivers/mfd/htc-egpio.c
@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/mfd/htc-egpio.h>
 
diff --git a/drivers/mfd/htc-i2cpld.c b/drivers/mfd/htc-i2cpld.c
index 37b9fdab4f36..594c9a8e25e1 100644
--- a/drivers/mfd/htc-i2cpld.c
+++ b/drivers/mfd/htc-i2cpld.c
@@ -35,6 +35,7 @@
 #include <linux/spinlock.h>
 #include <linux/htcpld.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 struct htcpld_chip {
 	spinlock_t              lock;
diff --git a/drivers/mfd/htc-pasic3.c b/drivers/mfd/htc-pasic3.c
index cb73051e43db..f04300e05fd6 100644
--- a/drivers/mfd/htc-pasic3.c
+++ b/drivers/mfd/htc-pasic3.c
@@ -19,6 +19,7 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/ds1wm.h>
 #include <linux/mfd/htc-pasic3.h>
+#include <linux/slab.h>
 
 struct pasic3_data {
 	void __iomem *mapping;
diff --git a/drivers/mfd/max8925-i2c.c b/drivers/mfd/max8925-i2c.c
index c0b883c14f41..d9fd8785da4d 100644
--- a/drivers/mfd/max8925-i2c.c
+++ b/drivers/mfd/max8925-i2c.c
@@ -13,6 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/mfd/max8925.h>
+#include <linux/slab.h>
 
 #define RTC_I2C_ADDR		0x68
 #define ADC_I2C_ADDR		0x47
diff --git a/drivers/mfd/mc13783-core.c b/drivers/mfd/mc13783-core.c
index 62a847e4c2d8..1f68ecadddc2 100644
--- a/drivers/mfd/mc13783-core.c
+++ b/drivers/mfd/mc13783-core.c
@@ -9,6 +9,7 @@
  * the terms of the GNU General Public License version 2 as published by the
  * Free Software Foundation.
  */
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/spi/spi.h>
 #include <linux/mfd/core.h>
diff --git a/drivers/mfd/mcp-sa11x0.c b/drivers/mfd/mcp-sa11x0.c
index 258427232728..2dab02d9ac8b 100644
--- a/drivers/mfd/mcp-sa11x0.c
+++ b/drivers/mfd/mcp-sa11x0.c
@@ -17,7 +17,6 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/spinlock.h>
-#include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/mcp.h>
 
diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c
index 970afa103261..a94b131a18ef 100644
--- a/drivers/mfd/menelaus.c
+++ b/drivers/mfd/menelaus.c
@@ -40,6 +40,7 @@
 #include <linux/delay.h>
 #include <linux/rtc.h>
 #include <linux/bcd.h>
+#include <linux/slab.h>
 
 #include <asm/mach/irq.h>
 
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index aa17f4bddc56..8ffbb7a85a7e 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -15,6 +15,7 @@
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
 #include <linux/mfd/core.h>
+#include <linux/slab.h>
 
 static int mfd_add_device(struct device *parent, int id,
 			  const struct mfd_cell *cell,
diff --git a/drivers/mfd/pcf50633-adc.c b/drivers/mfd/pcf50633-adc.c
index 6d2e8466df1d..fe8f922f6654 100644
--- a/drivers/mfd/pcf50633-adc.c
+++ b/drivers/mfd/pcf50633-adc.c
@@ -17,6 +17,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 03dcc9200707..63a614d696c1 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/irq.h>
+#include <linux/slab.h>
 
 #include <linux/mfd/pcf50633/core.h>
 
diff --git a/drivers/mfd/sh_mobile_sdhi.c b/drivers/mfd/sh_mobile_sdhi.c
index 468fd366d4da..497f91b6138e 100644
--- a/drivers/mfd/sh_mobile_sdhi.c
+++ b/drivers/mfd/sh_mobile_sdhi.c
@@ -20,6 +20,7 @@
 
 #include <linux/kernel.h>
 #include <linux/clk.h>
+#include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/mmc/host.h>
 #include <linux/mfd/core.h>
diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 7b6652f60117..bc9275c12133 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/i2c-gpio.h>
+#include <linux/slab.h>
 
 #include <linux/sm501.h>
 #include <linux/sm501-regs.h>
diff --git a/drivers/mfd/t7l66xb.c b/drivers/mfd/t7l66xb.c
index 26d9176fca91..da6383a934ac 100644
--- a/drivers/mfd/t7l66xb.c
+++ b/drivers/mfd/t7l66xb.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 #include <linux/irq.h>
 #include <linux/clk.h>
 #include <linux/platform_device.h>
diff --git a/drivers/mfd/tc6387xb.c b/drivers/mfd/tc6387xb.c
index 5c7f04343d5c..517f9bcdeaac 100644
--- a/drivers/mfd/tc6387xb.c
+++ b/drivers/mfd/tc6387xb.c
@@ -17,6 +17,7 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mfd/tc6387xb.h>
+#include <linux/slab.h>
 
 enum {
 	TC6387XB_CELL_MMC,
diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
index c59e5c5737d0..fcf9068810fb 100644
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -25,6 +25,7 @@
 #include <linux/mfd/tmio.h>
 #include <linux/mfd/tc6393xb.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 #define SCR_REVID	0x08		/* b Revision ID	*/
 #define SCR_ISR		0x50		/* b Interrupt Status	*/
diff --git a/drivers/mfd/timberdale.c b/drivers/mfd/timberdale.c
index 1ed44d283803..7f478ec4184b 100644
--- a/drivers/mfd/timberdale.c
+++ b/drivers/mfd/timberdale.c
@@ -25,6 +25,7 @@
 #include <linux/pci.h>
 #include <linux/msi.h>
 #include <linux/mfd/core.h>
+#include <linux/slab.h>
 
 #include <linux/timb_gpio.h>
 
diff --git a/drivers/mfd/twl4030-codec.c b/drivers/mfd/twl4030-codec.c
index 700b149c1b91..add6f67d8032 100644
--- a/drivers/mfd/twl4030-codec.c
+++ b/drivers/mfd/twl4030-codec.c
@@ -23,6 +23,7 @@
 
 #include <linux/module.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/platform_device.h>
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c
index 9df9a5ad38f9..202bdd59632d 100644
--- a/drivers/mfd/twl4030-irq.c
+++ b/drivers/mfd/twl4030-irq.c
@@ -31,6 +31,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/kthread.h>
+#include <linux/slab.h>
 
 #include <linux/i2c/twl.h>
 
diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c
index 85fd9421be94..dbe280153f9e 100644
--- a/drivers/mfd/ucb1400_core.c
+++ b/drivers/mfd/ucb1400_core.c
@@ -22,6 +22,7 @@
 
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <linux/ucb1400.h>
 
 unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 07101e9e1cba..a3d5728b6449 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -18,6 +18,7 @@
 #include <linux/bcd.h>
 #include <linux/delay.h>
 #include <linux/mfd/core.h>
+#include <linux/slab.h>
 
 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/pdata.h>
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index bd75807d5302..e400a3bed063 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/bug.h>
 #include <linux/device.h>
 #include <linux/delay.h>
diff --git a/drivers/mfd/wm8350-i2c.c b/drivers/mfd/wm8350-i2c.c
index 8d8c93217572..65830f57c093 100644
--- a/drivers/mfd/wm8350-i2c.c
+++ b/drivers/mfd/wm8350-i2c.c
@@ -19,6 +19,7 @@
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/wm8350/core.h>
+#include <linux/slab.h>
 
 static int wm8350_i2c_read_device(struct wm8350 *wm8350, char reg,
 				  int bytes, void *dest)
diff --git a/drivers/mfd/wm8400-core.c b/drivers/mfd/wm8400-core.c
index ecfc8bbe89b9..865ce013a821 100644
--- a/drivers/mfd/wm8400-core.c
+++ b/drivers/mfd/wm8400-core.c
@@ -18,6 +18,7 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/wm8400-private.h>
 #include <linux/mfd/wm8400-audio.h>
+#include <linux/slab.h>
 
 static struct {
 	u16  readable;    /* Mask of readable bits */
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 844e1c1b7d90..cc524df10aa1 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -14,6 +14,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/delay.h>
 #include <linux/mfd/core.h>