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>

28 files changed, 25 insertions, 3 deletions

diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 6cf8fd2b79e..f77c6042399 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -10,6 +10,7 @@
 #include <linux/list.h>
 #include <linux/uaccess.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 #include <linux/rcupdate.h>
 #include <linux/mutex.h>
 
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 2a5e0bcf388..52015d098fd 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -13,6 +13,7 @@
  *	and store_template.
  */
 #include <linux/module.h>
+#include <linux/slab.h>
 
 #include "ima.h"
 static const char *IMA_TEMPLATE_NAME = "ima";
diff --git a/security/integrity/ima/ima_audit.c b/security/integrity/ima/ima_audit.c
index ff513ff737f..5af76340470 100644
--- a/security/integrity/ima/ima_audit.c
+++ b/security/integrity/ima/ima_audit.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/gfp.h>
 #include <linux/audit.h>
 #include "ima.h"
 
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index 46642a19bc7..952e51373f5 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -18,6 +18,7 @@
 #include <linux/crypto.h>
 #include <linux/scatterlist.h>
 #include <linux/err.h>
+#include <linux/slab.h>
 #include "ima.h"
 
 static int init_desc(struct hash_desc *desc)
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 0c72c9c3895..07cb9c338cc 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -16,6 +16,7 @@
  *	current measurement list and IMA statistics
  */
 #include <linux/fcntl.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/seq_file.h>
 #include <linux/rculist.h>
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index 2d4d05d92fd..2c744d48801 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -14,6 +14,7 @@
  *	- cache integrity information associated with an inode
  *	  using a radix tree.
  */
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/radix-tree.h>
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index a40da7ae590..b1bcb702a27 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -16,6 +16,7 @@
  */
 #include <linux/module.h>
 #include <linux/scatterlist.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 #include "ima.h"
 
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 294b005d652..b2c89d9de2a 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -21,6 +21,7 @@
 #include <linux/binfmts.h>
 #include <linux/mount.h>
 #include <linux/mman.h>
+#include <linux/slab.h>
 
 #include "ima.h"
 
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 4759d0f9933..8643a93c596 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -15,6 +15,7 @@
 #include <linux/security.h>
 #include <linux/magic.h>
 #include <linux/parser.h>
+#include <linux/slab.h>
 
 #include "ima.h"
 
diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c
index a0880e9c8e0..46ba62b1adf 100644
--- a/security/integrity/ima/ima_queue.c
+++ b/security/integrity/ima/ima_queue.c
@@ -20,6 +20,7 @@
  */
 #include <linux/module.h>
 #include <linux/rculist.h>
+#include <linux/slab.h>
 #include "ima.h"
 
 LIST_HEAD(ima_measurements);	/* list of all measurements */
diff --git a/security/keys/proc.c b/security/keys/proc.c
index 9d01021ca0c..706d63f4f18 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -12,7 +12,6 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/sched.h>
-#include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 5c23afb31ec..06c2ccf26ed 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -12,7 +12,6 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/sched.h>
-#include <linux/slab.h>
 #include <linux/keyctl.h>
 #include <linux/fs.h>
 #include <linux/err.h>
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index acba3dfc8d2..893365b79a2 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -14,6 +14,7 @@
 #include <linux/types.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
+#include <linux/gfp.h>
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <net/sock.h>
diff --git a/security/selinux/netif.c b/security/selinux/netif.c
index b4e14bc0bf3..d6095d63d83 100644
--- a/security/selinux/netif.c
+++ b/security/selinux/netif.c
@@ -16,6 +16,7 @@
  */
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 2534400317c..628da72ee76 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -29,6 +29,7 @@
 
 #include <linux/spinlock.h>
 #include <linux/rcupdate.h>
+#include <linux/gfp.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <net/sock.h>
diff --git a/security/selinux/netlink.c b/security/selinux/netlink.c
index 1ae556446e6..0e147b6914a 100644
--- a/security/selinux/netlink.c
+++ b/security/selinux/netlink.c
@@ -11,6 +11,7 @@
  */
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index 7100072bb1b..dc92792271f 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -31,6 +31,7 @@
 #include <linux/types.h>
 #include <linux/rcupdate.h>
 #include <linux/list.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/in.h>
 #include <linux/in6.h>
diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index fe7fba67f19..cfe2d72d3fb 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -30,6 +30,7 @@
 #include <linux/types.h>
 #include <linux/rcupdate.h>
 #include <linux/list.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/in.h>
 #include <linux/in6.h>
diff --git a/security/selinux/ss/symtab.c b/security/selinux/ss/symtab.c
index 837658a98a5..bcf9f620426 100644
--- a/security/selinux/ss/symtab.c
+++ b/security/selinux/ss/symtab.c
@@ -4,7 +4,6 @@
  * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
  */
 #include <linux/kernel.h>
-#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/errno.h>
 #include "symtab.h"
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index f3cb9ed731a..fff78d3b51a 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -38,6 +38,7 @@
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv4.h>
 #include <linux/netfilter_ipv6.h>
+#include <linux/slab.h>
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/skbuff.h>
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 0f9ac814690..f4fac64c4da 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/types.h>
+#include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
 #include "smack.h"
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 5225e668dbf..fdfeaa2f28e 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -25,6 +25,7 @@
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/udp.h>
+#include <linux/slab.h>
 #include <linux/mutex.h>
 #include <linux/pipe_fs_i.h>
 #include <net/netlabel.h>
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index aeead758509..a2b72d77f92 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -20,6 +20,7 @@
 #include <linux/vmalloc.h>
 #include <linux/security.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 #include <net/net_namespace.h>
 #include <net/netlabel.h>
 #include <net/cipso_ipv4.h>
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index ef89947a774..975c45d88ba 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/uaccess.h>
+#include <linux/slab.h>
 #include <linux/security.h>
 #include <linux/hardirq.h>
 #include "common.h"
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index 66caaa1b842..acb8c397d5c 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -11,6 +11,7 @@
 
 #include "common.h"
 #include <linux/binfmts.h>
+#include <linux/slab.h>
 
 /* Variables definitions.*/
 
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 1b24304edb7..6f3fe76a1fd 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -10,6 +10,7 @@
  */
 
 #include "common.h"
+#include <linux/slab.h>
 
 /* Keyword array for single path operations. */
 static const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c
index 9645525ccdd..d9ad35bc7fa 100644
--- a/security/tomoyo/gc.c
+++ b/security/tomoyo/gc.c
@@ -9,6 +9,7 @@
 
 #include "common.h"
 #include <linux/kthread.h>
+#include <linux/slab.h>
 
 enum tomoyo_gc_id {
 	TOMOYO_ID_DOMAIN_INITIALIZER,
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index cf7d61f781b..c225c65ce42 100644
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -15,6 +15,7 @@
 #include <linux/fs_struct.h>
 #include <linux/hash.h>
 #include <linux/magic.h>
+#include <linux/slab.h>
 #include "common.h"
 
 /**