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>

30 files changed, 27 insertions, 6 deletions

diff --git a/arch/ia64/include/asm/dmi.h b/arch/ia64/include/asm/dmi.h
index 00eb1b130b63..1ed4c8fedb83 100644
--- a/arch/ia64/include/asm/dmi.h
+++ b/arch/ia64/include/asm/dmi.h
@@ -1,6 +1,7 @@
 #ifndef _ASM_DMI_H
 #define _ASM_DMI_H 1
 
+#include <linux/slab.h>
 #include <asm/io.h>
 
 /* Use normal IO mappings for DMI */
diff --git a/arch/ia64/kernel/acpi-ext.c b/arch/ia64/kernel/acpi-ext.c
index b7515bc808a8..8b9318d311a0 100644
--- a/arch/ia64/kernel/acpi-ext.c
+++ b/arch/ia64/kernel/acpi-ext.c
@@ -10,6 +10,7 @@
 
 #include <linux/module.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/acpi.h>
 
 #include <asm/acpi-ext.h>
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index f1c9f70b4e45..4d1a7e9314cf 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -44,6 +44,7 @@
 #include <linux/efi.h>
 #include <linux/mmzone.h>
 #include <linux/nodemask.h>
+#include <linux/slab.h>
 #include <acpi/processor.h>
 #include <asm/io.h>
 #include <asm/iosapic.h>
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 7b435451b3dc..b0b4e6e710f2 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/cpufreq.h>
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index c745d0aeb6e0..a0f001928502 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -26,6 +26,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/efi.h>
 #include <linux/kexec.h>
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 95ac77aeae9b..7ded76658d2d 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -86,6 +86,7 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/pci.h>
+#include <linux/slab.h>
 #include <linux/smp.h>
 #include <linux/string.h>
 #include <linux/bootmem.h>
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index d4093a173a3e..640479304ac0 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -22,7 +22,6 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/kernel_stat.h>
-#include <linux/slab.h>
 #include <linux/ptrace.h>
 #include <linux/random.h>	/* for rand_initialize_irq() */
 #include <linux/signal.h>
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 378b4833024f..a0220dc5ff42 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -85,6 +85,7 @@
 #include <linux/cpumask.h>
 #include <linux/kdebug.h>
 #include <linux/cpu.h>
+#include <linux/gfp.h>
 
 #include <asm/delay.h>
 #include <asm/machvec.h>
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index f94aaa86933f..09b4d6828c45 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -22,6 +22,7 @@
 #include <linux/smp.h>
 #include <linux/workqueue.h>
 #include <linux/mm.h>
+#include <linux/slab.h>
 
 #include <asm/delay.h>
 #include <asm/machvec.h>
diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c
index 53292abf846c..3095654f9ab3 100644
--- a/arch/ia64/kernel/pci-swiotlb.c
+++ b/arch/ia64/kernel/pci-swiotlb.c
@@ -1,6 +1,7 @@
 /* Glue code to lib/swiotlb.c */
 
 #include <linux/pci.h>
+#include <linux/gfp.h>
 #include <linux/cache.h>
 #include <linux/module.h>
 #include <linux/dma-mapping.h>
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 703062c44fb9..ab985f785c14 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -41,6 +41,7 @@
 #include <linux/rcupdate.h>
 #include <linux/completion.h>
 #include <linux/tracehook.h>
+#include <linux/slab.h>
 
 #include <asm/errno.h>
 #include <asm/intrinsics.h>
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index d92765cae10a..53f1648c8b81 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -15,11 +15,11 @@
 #include <linux/kallsyms.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/personality.h>
 #include <linux/sched.h>
-#include <linux/slab.h>
 #include <linux/stddef.h>
 #include <linux/thread_info.h>
 #include <linux/unistd.h>
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index b61afbbe076f..0dec7f702448 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -11,7 +11,6 @@
  */
 #include <linux/kernel.h>
 #include <linux/sched.h>
-#include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/errno.h>
 #include <linux/ptrace.h>
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index b3a5818088d9..28f299de2903 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/node.h>
+#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
 #include <linux/nodemask.h>
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index a595823582d9..c4696d217ce0 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -18,9 +18,9 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/string.h>
-#include <linux/slab.h>
 #include <linux/efi.h>
 #include <linux/genalloc.h>
+#include <linux/gfp.h>
 #include <asm/page.h>
 #include <asm/pal.h>
 #include <asm/system.h>
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 26e0e089bfe7..73c5c2b05f64 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -23,8 +23,8 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/percpu.h>
-#include <linux/gfp.h>
 #include <linux/fs.h>
+#include <linux/slab.h>
 #include <linux/smp.h>
 #include <linux/kvm_host.h>
 #include <linux/kvm.h>
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 8d586d1e2515..61620323bb60 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -22,6 +22,7 @@
 #include <linux/acpi.h>
 #include <linux/efi.h>
 #include <linux/nodemask.h>
+#include <linux/slab.h>
 #include <asm/pgalloc.h>
 #include <asm/tlb.h>
 #include <asm/meminit.h>
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index b0f615759e97..1841ee7e65f9 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -14,7 +14,6 @@
 #include <linux/hugetlb.h>
 #include <linux/pagemap.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/sysctl.h>
 #include <linux/log2.h>
 #include <asm/mman.h>
diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c
index f3de9d7a98b4..5dfd916e9ea6 100644
--- a/arch/ia64/mm/tlb.c
+++ b/arch/ia64/mm/tlb.c
@@ -22,6 +22,7 @@
 #include <linux/smp.h>
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/slab.h>
 
 #include <asm/delay.h>
 #include <asm/mmu_context.h>
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c
index c6d6b62db66c..cad775a1a157 100644
--- a/arch/ia64/sn/kernel/bte.c
+++ b/arch/ia64/sn/kernel/bte.c
@@ -19,6 +19,7 @@
 #include <linux/bootmem.h>
 #include <linux/string.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 
 #include <asm/sn/bte.h>
 
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
index 66f633bff059..8cdcb173a138 100644
--- a/arch/ia64/sn/kernel/io_acpi_init.c
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -13,6 +13,7 @@
 #include <asm/sn/sn_sal.h>
 #include "xtalk/hubdev.h"
 #include <linux/acpi.h>
+#include <linux/slab.h>
 
 
 /*
diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
index 308e6595110e..4433dd019d3c 100644
--- a/arch/ia64/sn/kernel/io_common.c
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/bootmem.h>
+#include <linux/slab.h>
 #include <asm/sn/types.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/sn_feature_sets.h>
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index ee774c366a06..98079f29d9a9 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -6,6 +6,7 @@
  * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
  */
 
+#include <linux/slab.h>
 #include <asm/sn/types.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/io.h>
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 40d6eeda1c4b..13c15d968098 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -12,6 +12,7 @@
 #include <linux/spinlock.h>
 #include <linux/init.h>
 #include <linux/rculist.h>
+#include <linux/slab.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/intr.h>
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index fbbfb9701201..ebfdd6a9ae1a 100644
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -11,6 +11,7 @@
 #include <linux/pci.h>
 #include <linux/cpumask.h>
 #include <linux/msi.h>
+#include <linux/slab.h>
 
 #include <asm/sn/addrs.h>
 #include <asm/sn/intr.h>
diff --git a/arch/ia64/sn/pci/pci_dma.c b/arch/ia64/sn/pci/pci_dma.c
index 98b684928e12..a9d310de57da 100644
--- a/arch/ia64/sn/pci/pci_dma.c
+++ b/arch/ia64/sn/pci/pci_dma.c
@@ -9,6 +9,7 @@
  * a description of how these routines should be used.
  */
 
+#include <linux/gfp.h>
 #include <linux/module.h>
 #include <linux/dma-mapping.h>
 #include <asm/dma.h>
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index d13e5a22a558..3cb5cf377644 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -8,6 +8,7 @@
 
 #include <linux/interrupt.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/pci.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/geo.h>
diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c
index efb454534e52..4d4536e3b6f3 100644
--- a/arch/ia64/sn/pci/tioca_provider.c
+++ b/arch/ia64/sn/pci/tioca_provider.c
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/bitmap.h>
+#include <linux/slab.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/io.h>
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 012f3b82ee55..27faba035f3a 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -8,6 +8,7 @@
 
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/slab.h>
 #include <linux/pci.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/addrs.h>
diff --git a/arch/ia64/xen/grant-table.c b/arch/ia64/xen/grant-table.c
index 777dd9a9108b..48cca37625eb 100644
--- a/arch/ia64/xen/grant-table.c
+++ b/arch/ia64/xen/grant-table.c
@@ -22,6 +22,7 @@
 
 #include <linux/module.h>
 #include <linux/vmalloc.h>
+#include <linux/slab.h>
 #include <linux/mm.h>
 
 #include <xen/interface/xen.h>