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>

25 files changed, 22 insertions, 3 deletions

diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c
index ae0251ef6f4e..78ed24bb6a35 100644
--- a/drivers/serial/68328serial.c
+++ b/drivers/serial/68328serial.c
@@ -35,6 +35,7 @@
 #include <linux/pm.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
+#include <linux/gfp.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index c3db16b7afa1..2b1ea3d4c4f4 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -38,6 +38,7 @@
 #include <linux/serial_8250.h>
 #include <linux/nmi.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c
index 33149d982e82..d8c0ffbfa6e3 100644
--- a/drivers/serial/8250_gsc.c
+++ b/drivers/serial/8250_gsc.c
@@ -16,7 +16,6 @@
 #include <linux/module.h>
 #include <linux/serial_core.h>
 #include <linux/signal.h>
-#include <linux/slab.h>
 #include <linux/types.h>
 
 #include <asm/hardware.h>
diff --git a/drivers/serial/8250_hp300.c b/drivers/serial/8250_hp300.c
index 0e1410f2c033..c13438c93012 100644
--- a/drivers/serial/8250_hp300.c
+++ b/drivers/serial/8250_hp300.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/dio.h>
 #include <linux/console.h>
+#include <linux/slab.h>
 #include <asm/io.h>
 
 #include "8250.h"
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index e4b3c2c88bb6..b09a638d051f 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -47,6 +47,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/serial.h>
 #include <linux/clk.h>
+#include <linux/slab.h>
 
 #include <asm/io.h>
 
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index ce6c35333ff7..743ebf5f16da 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -47,6 +47,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/serial.h>
 #include <linux/clk.h>
+#include <linux/slab.h>
 
 #include <asm/io.h>
 #include <asm/sizes.h>
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index fcf273e3f48c..96f7e7484fee 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -14,6 +14,7 @@
 
 #include <linux/module.h>
 #include <linux/ioport.h>
+#include <linux/gfp.h>
 #include <linux/io.h>
 #include <linux/init.h>
 #include <linux/console.h>
diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c
index 7c72888fbf94..c88f8ad3ff82 100644
--- a/drivers/serial/bfin_sport_uart.c
+++ b/drivers/serial/bfin_sport_uart.c
@@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/console.h>
 #include <linux/sysrq.h>
+#include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
index 1b94c56ec239..3fc1d66e32c6 100644
--- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c
+++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
@@ -29,6 +29,7 @@
 
 #include <linux/module.h>
 #include <linux/tty.h>
+#include <linux/gfp.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/serial.h>
diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/serial/cpm_uart/cpm_uart_cpm2.c
index 722eac18f382..814ac006393f 100644
--- a/drivers/serial/cpm_uart/cpm_uart_cpm2.c
+++ b/drivers/serial/cpm_uart/cpm_uart_cpm2.c
@@ -30,6 +30,7 @@
 #include <linux/module.h>
 #include <linux/tty.h>
 #include <linux/ioport.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/serial.h>
 #include <linux/console.h>
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index e579d7a1807a..4315b23590bd 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -46,6 +46,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/rational.h>
+#include <linux/slab.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/drivers/serial/ioc3_serial.c b/drivers/serial/ioc3_serial.c
index 23ba6b40b3ac..f164ba4eba02 100644
--- a/drivers/serial/ioc3_serial.c
+++ b/drivers/serial/ioc3_serial.c
@@ -20,6 +20,7 @@
 #include <linux/pci.h>
 #include <linux/serial_core.h>
 #include <linux/ioc3.h>
+#include <linux/slab.h>
 
 /*
  * Interesting things about the ioc3
diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index 836d9ab4f729..8ad28fc64926 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -22,6 +22,7 @@
 #include <linux/pci.h>
 #include <linux/ioc4.h>
 #include <linux/serial_core.h>
+#include <linux/slab.h>
 
 /*
  * interesting things about the ioc4
diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
index 12cb5e446a4f..eaf545014119 100644
--- a/drivers/serial/jsm/jsm_driver.c
+++ b/drivers/serial/jsm/jsm_driver.c
@@ -26,6 +26,7 @@
  ***********************************************************************/
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
+#include <linux/slab.h>
 
 #include "jsm.h"
 
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 5673ca9dfdc8..7a4a914ecff0 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -30,6 +30,7 @@
 #include <linux/serial_reg.h>
 #include <linux/delay.h>	/* For udelay */
 #include <linux/pci.h>
+#include <linux/slab.h>
 
 #include "jsm.h"
 
diff --git a/drivers/serial/max3100.c b/drivers/serial/max3100.c
index 3c30c56aa2e1..3351c3bd59e4 100644
--- a/drivers/serial/max3100.c
+++ b/drivers/serial/max3100.c
@@ -41,6 +41,7 @@
 #define MAX_MAX3100 4
 
 #include <linux/delay.h>
+#include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/serial_core.h>
 #include <linux/serial.h>
diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index b5496c28e60b..55e113a0be03 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -70,6 +70,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/mv643xx.h>
 #include <linux/platform_device.h>
+#include <linux/gfp.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index 7571aaa138b0..9711e06a8374 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -22,7 +22,6 @@
 #include <linux/init.h>
 #include <linux/serial.h>
 #include <linux/console.h>
-#include <linux/slab.h>
 #include <linux/delay.h> /* for udelay */
 #include <linux/device.h>
 #include <asm/io.h>
diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c
index cdf172eda2e3..4abfebdb0fcc 100644
--- a/drivers/serial/of_serial.c
+++ b/drivers/serial/of_serial.c
@@ -11,6 +11,7 @@
  */
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/serial_core.h>
 #include <linux/serial_8250.h>
 #include <linux/of_platform.h>
diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index f020de1cdd50..4eaa043ca2a8 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -54,7 +54,6 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/console.h>
-#include <linux/slab.h>
 #include <linux/adb.h>
 #include <linux/pmu.h>
 #include <linux/bitops.h>
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 56ee082157aa..1102a39b44f5 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -44,6 +44,7 @@
 #include <linux/serial_core.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 
 struct uart_pxa_port {
 	struct uart_port        port;
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 309de6be8204..8eb094c1f61b 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -50,6 +50,7 @@
 #include <linux/list.h>
 #include <linux/dmaengine.h>
 #include <linux/scatterlist.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_SUPERH
 #include <asm/sh_bios.h>
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 170d3d68c8f0..81fc269046fd 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -29,6 +29,7 @@
 #include <linux/serial.h>
 #include <linux/sysrq.h>
 #include <linux/console.h>
+#include <linux/slab.h>
 #ifdef CONFIG_SERIO
 #include <linux/serio.h>
 #endif
diff --git a/drivers/serial/timbuart.c b/drivers/serial/timbuart.c
index 7bf10264a6ac..786ba85c170b 100644
--- a/drivers/serial/timbuart.c
+++ b/drivers/serial/timbuart.c
@@ -26,6 +26,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/ioport.h>
+#include <linux/slab.h>
 
 #include "timbuart.h"
 
diff --git a/drivers/serial/ucc_uart.c b/drivers/serial/ucc_uart.c
index 465f2fae1025..074904912f64 100644
--- a/drivers/serial/ucc_uart.c
+++ b/drivers/serial/ucc_uart.c
@@ -20,6 +20,7 @@
 
 #include <linux/module.h>
 #include <linux/serial.h>
+#include <linux/slab.h>
 #include <linux/serial_core.h>
 #include <linux/io.h>
 #include <linux/of_platform.h>