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>

23 files changed, 22 insertions, 1 deletions

diff --git a/drivers/leds/dell-led.c b/drivers/leds/dell-led.c
index ee31089..5259029 100644
--- a/drivers/leds/dell-led.c
+++ b/drivers/leds/dell-led.c
@@ -13,6 +13,7 @@
 
 #include <linux/acpi.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 
 MODULE_AUTHOR("Louis Davis/Jim Dailey");
 MODULE_DESCRIPTION("Dell LED Control Driver");
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index d8ddd9e..f1c00db 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -21,6 +21,7 @@
 #include <linux/timer.h>
 #include <linux/rwsem.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include "leds.h"
 
 /*
diff --git a/drivers/leds/leds-88pm860x.c b/drivers/leds/leds-88pm860x.c
index d196073..16a60c0 100644
--- a/drivers/leds/leds-88pm860x.c
+++ b/drivers/leds/leds-88pm860x.c
@@ -15,6 +15,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/mfd/88pm860x.h>
 
diff --git a/drivers/leds/leds-adp5520.c b/drivers/leds/leds-adp5520.c
index a8f3159..7ba4c7b 100644
--- a/drivers/leds/leds-adp5520.c
+++ b/drivers/leds/leds-adp5520.c
@@ -20,6 +20,7 @@
 #include <linux/leds.h>
 #include <linux/workqueue.h>
 #include <linux/mfd/adp5520.h>
+#include <linux/slab.h>
 
 struct adp5520_led {
 	struct led_classdev	cdev;
diff --git a/drivers/leds/leds-atmel-pwm.c b/drivers/leds/leds-atmel-pwm.c
index 52297c3..c941d906 100644
--- a/drivers/leds/leds-atmel-pwm.c
+++ b/drivers/leds/leds-atmel-pwm.c
@@ -3,6 +3,7 @@
 #include <linux/leds.h>
 #include <linux/io.h>
 #include <linux/atmel_pwm.h>
+#include <linux/slab.h>
 
 
 struct pwmled {
diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
index 779d7f2..286b501 100644
--- a/drivers/leds/leds-bd2802.c
+++ b/drivers/leds/leds-bd2802.c
@@ -18,6 +18,7 @@
 #include <linux/delay.h>
 #include <linux/leds.h>
 #include <linux/leds-bd2802.h>
+#include <linux/slab.h>
 
 
 #define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))
diff --git a/drivers/leds/leds-da903x.c b/drivers/leds/leds-da903x.c
index 1f3cc51..f28931c 100644
--- a/drivers/leds/leds-da903x.c
+++ b/drivers/leds/leds-da903x.c
@@ -19,6 +19,7 @@
 #include <linux/leds.h>
 #include <linux/workqueue.h>
 #include <linux/mfd/da903x.h>
+#include <linux/slab.h>
 
 #define DA9030_LED1_CONTROL	0x20
 #define DA9030_LED2_CONTROL	0x21
diff --git a/drivers/leds/leds-dac124s085.c b/drivers/leds/leds-dac124s085.c
index 2913d76..31cf0d6 100644
--- a/drivers/leds/leds-dac124s085.c
+++ b/drivers/leds/leds-dac124s085.c
@@ -9,7 +9,6 @@
  * LED driver for the DAC124S085 SPI DAC
  */
 
-#include <linux/gfp.h>
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 0823e26..c6e4b77 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include <linux/workqueue.h>
 
 #include <asm/gpio.h>
diff --git a/drivers/leds/leds-lp3944.c b/drivers/leds/leds-lp3944.c
index 5946208..8d5ecce 100644
--- a/drivers/leds/leds-lp3944.c
+++ b/drivers/leds/leds-lp3944.c
@@ -28,6 +28,7 @@
 
 #include <linux/module.h>
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/leds.h>
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
diff --git a/drivers/leds/leds-lt3593.c b/drivers/leds/leds-lt3593.c
index fee40a8..2579678 100644
--- a/drivers/leds/leds-lt3593.c
+++ b/drivers/leds/leds-lt3593.c
@@ -23,6 +23,7 @@
 #include <linux/workqueue.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 struct lt3593_led_data {
 	struct led_classdev cdev;
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index adc561e..6682175 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -13,6 +13,7 @@
 
 #include <linux/module.h>
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/leds.h>
 #include <linux/input.h>
 #include <linux/mutex.h>
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 4e2d1a4..8ff50f2 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -48,6 +48,7 @@
 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/workqueue.h>
+#include <linux/slab.h>
 
 /* LED select registers determine the source that drives LED outputs */
 #define PCA955X_LS_LED_ON	0x0	/* Output LOW */
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 88b1dd0..da3fa8d 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -21,6 +21,7 @@
 #include <linux/err.h>
 #include <linux/pwm.h>
 #include <linux/leds_pwm.h>
+#include <linux/slab.h>
 
 struct led_pwm_data {
 	struct led_classdev	cdev;
diff --git a/drivers/leds/leds-regulator.c b/drivers/leds/leds-regulator.c
index 7f00de3..3790816 100644
--- a/drivers/leds/leds-regulator.c
+++ b/drivers/leds/leds-regulator.c
@@ -13,6 +13,7 @@
 
 #include <linux/module.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/leds.h>
 #include <linux/leds-regulator.h>
diff --git a/drivers/leds/leds-s3c24xx.c b/drivers/leds/leds-s3c24xx.c
index aa7acf3..a77771d 100644
--- a/drivers/leds/leds-s3c24xx.c
+++ b/drivers/leds/leds-s3c24xx.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include <linux/leds.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 #include <mach/hardware.h>
 #include <mach/regs-gpio.h>
diff --git a/drivers/leds/leds-sunfire.c b/drivers/leds/leds-sunfire.c
index 6b008f0..ab6d18f 100644
--- a/drivers/leds/leds-sunfire.c
+++ b/drivers/leds/leds-sunfire.c
@@ -9,6 +9,7 @@
 #include <linux/leds.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 
 #include <asm/fhc.h>
 #include <asm/upa.h>
diff --git a/drivers/leds/leds-wm831x-status.c b/drivers/leds/leds-wm831x-status.c
index c586d05..ef5c241 100644
--- a/drivers/leds/leds-wm831x-status.c
+++ b/drivers/leds/leds-wm831x-status.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/leds.h>
 #include <linux/err.h>
 #include <linux/mfd/wm831x/core.h>
diff --git a/drivers/leds/leds-wm8350.c b/drivers/leds/leds-wm8350.c
index 38c6bcb..5aab32c 100644
--- a/drivers/leds/leds-wm8350.c
+++ b/drivers/leds/leds-wm8350.c
@@ -16,6 +16,7 @@
 #include <linux/err.h>
 #include <linux/mfd/wm8350/pmic.h>
 #include <linux/regulator/consumer.h>
+#include <linux/slab.h>
 
 /* Microamps */
 static const int isink_cur[] = {
diff --git a/drivers/leds/ledtrig-backlight.c b/drivers/leds/ledtrig-backlight.c
index d3dfcfb..f948e57 100644
--- a/drivers/leds/ledtrig-backlight.c
+++ b/drivers/leds/ledtrig-backlight.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/fb.h>
 #include <linux/leds.h>
diff --git a/drivers/leds/ledtrig-gpio.c b/drivers/leds/ledtrig-gpio.c
index f591337..991d93b 100644
--- a/drivers/leds/ledtrig-gpio.c
+++ b/drivers/leds/ledtrig-gpio.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/workqueue.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include "leds.h"
 
 struct gpio_trig_data {
diff --git a/drivers/leds/ledtrig-heartbeat.c b/drivers/leds/ledtrig-heartbeat.c
index c1c1ea6..759c0bba 100644
--- a/drivers/leds/ledtrig-heartbeat.c
+++ b/drivers/leds/ledtrig-heartbeat.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/timer.h>
 #include <linux/sched.h>
 #include <linux/leds.h>
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c
index 38b3378..82b77bd 100644
--- a/drivers/leds/ledtrig-timer.c
+++ b/drivers/leds/ledtrig-timer.c
@@ -22,6 +22,7 @@
 #include <linux/timer.h>
 #include <linux/ctype.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include "leds.h"
 
 struct timer_trig_data {