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>

35 files changed, 35 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 7e567ae..413054f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -53,6 +53,7 @@
 #include <linux/route.h>
 #include <linux/inetdevice.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
 #endif
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index 6ff73c4..ae404c9 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -13,6 +13,7 @@
 #include <linux/list.h>
 #include <linux/rcupdate.h>
 #include <linux/in6.h>
+#include <linux/slab.h>
 #include <net/addrconf.h>
 #include <linux/if_addrlabel.h>
 #include <linux/netlink.h>
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 37d14e7..3192aa0 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -36,6 +36,7 @@
 #include <linux/proc_fs.h>
 #include <linux/stat.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 
 #include <linux/inet.h>
 #include <linux/netdevice.h>
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 5ac8902..ee82d4e 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -26,6 +26,7 @@
 
 #include <crypto/hash.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <net/ip.h>
 #include <net/ah.h>
 #include <linux/crypto.h>
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index c4f6ca3..b5b0705 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -29,6 +29,7 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 
 #include <net/net_namespace.h>
 #include <net/sock.h>
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index e6f9cdf..622dc79 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -21,6 +21,7 @@
 #include <linux/in6.h>
 #include <linux/ipv6.h>
 #include <linux/route.h>
+#include <linux/slab.h>
 
 #include <net/ipv6.h>
 #include <net/ndisc.h>
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 074f2c0..8a659f9 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -29,6 +29,7 @@
 #include <linux/netdevice.h>
 #include <linux/in6.h>
 #include <linux/icmpv6.h>
+#include <linux/slab.h>
 
 #include <net/dst.h>
 #include <net/sock.h>
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index eb9abe2..3330a4b 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -40,6 +40,7 @@
 #include <linux/skbuff.h>
 #include <linux/init.h>
 #include <linux/netfilter.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 3516e6f..628db24 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -17,6 +17,7 @@
 #include <linux/in6.h>
 #include <linux/ipv6.h>
 #include <linux/jhash.h>
+#include <linux/slab.h>
 
 #include <net/addrconf.h>
 #include <net/inet_connection_sock.h>
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 2f98479..6b82e02 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -26,6 +26,7 @@
 #include <linux/in6.h>
 #include <linux/init.h>
 #include <linux/list.h>
+#include <linux/slab.h>
 
 #ifdef 	CONFIG_PROC_FS
 #include <linux/proc_fs.h>
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index e41eba8..14e2321 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -20,6 +20,7 @@
 #include <linux/route.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 
 #include <net/net_namespace.h>
 #include <net/sock.h>
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index e28f920..6aa7ee1 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -28,6 +28,7 @@
 #include <linux/in6.h>
 #include <linux/icmpv6.h>
 #include <linux/mroute6.h>
+#include <linux/slab.h>
 
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv6.h>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index dabf108..16c4391 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -37,6 +37,7 @@
 #include <linux/tcp.h>
 #include <linux/route.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv6.h>
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 138980e..2599870 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -37,6 +37,7 @@
 #include <linux/route.h>
 #include <linux/rtnetlink.h>
 #include <linux/netfilter_ipv6.h>
+#include <linux/slab.h>
 
 #include <asm/uaccess.h>
 #include <asm/atomic.h>
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 27acfb5..3e33326 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -33,6 +33,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <net/protocol.h>
 #include <linux/skbuff.h>
 #include <net/sock.h>
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 430454e..33f60fc 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -36,6 +36,7 @@
 #include <linux/init.h>
 #include <linux/sysctl.h>
 #include <linux/netfilter.h>
+#include <linux/slab.h>
 
 #include <net/sock.h>
 #include <net/snmp.h>
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index bcd9719..c483ab9 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -43,6 +43,7 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/slab.h>
 
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv6.h>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 8bcc4b7d..da0a4d2 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -59,6 +59,7 @@
 #include <linux/route.h>
 #include <linux/init.h>
 #include <linux/rcupdate.h>
+#include <linux/slab.h>
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
 #endif
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index 7854052..6a68a74 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -25,6 +25,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 #include <net/net_namespace.h>
 #include <net/sock.h>
 #include <net/ipv6.h>
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index dd8afba..39b50c3 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -15,6 +15,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/gfp.h>
 #include <linux/module.h>
 #include <linux/skbuff.h>
 #include <linux/icmpv6.h>
diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c
index 36b72ca..d6fc9af 100644
--- a/net/ipv6/netfilter/ip6table_filter.c
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/slab.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index 7844e55..6a102b5 100644
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -10,6 +10,7 @@
  */
 #include <linux/module.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/slab.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
diff --git a/net/ipv6/netfilter/ip6table_raw.c b/net/ipv6/netfilter/ip6table_raw.c
index b9cf7cd..5b9926a 100644
--- a/net/ipv6/netfilter/ip6table_raw.c
+++ b/net/ipv6/netfilter/ip6table_raw.c
@@ -5,6 +5,7 @@
  */
 #include <linux/module.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/slab.h>
 
 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
 
diff --git a/net/ipv6/netfilter/ip6table_security.c b/net/ipv6/netfilter/ip6table_security.c
index 0824d86..91aa2b4 100644
--- a/net/ipv6/netfilter/ip6table_security.c
+++ b/net/ipv6/netfilter/ip6table_security.c
@@ -17,6 +17,7 @@
  */
 #include <linux/module.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/slab.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index f1171b7..dd5b9bd 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -27,6 +27,7 @@
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 #include <linux/random.h>
+#include <linux/slab.h>
 
 #include <net/sock.h>
 #include <net/snmp.h>
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ed31c37..8763b1a 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -21,6 +21,7 @@
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/socket.h>
+#include <linux/slab.h>
 #include <linux/sockios.h>
 #include <linux/net.h>
 #include <linux/in6.h>
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index a555156..6d4292f 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -41,6 +41,7 @@
 #include <linux/random.h>
 #include <linux/jhash.h>
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 
 #include <net/sock.h>
 #include <net/snmp.h>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0d7713c..c2438e8 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -40,6 +40,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/nsproxy.h>
+#include <linux/slab.h>
 #include <net/net_namespace.h>
 #include <net/snmp.h>
 #include <net/ipv6.h>
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index b1eea81..5abae10 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -28,6 +28,7 @@
 #include <linux/netdevice.h>
 #include <linux/if_arp.h>
 #include <linux/icmp.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 #include <linux/init.h>
 #include <linux/netfilter_ipv4.h>
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index f841d93..fa1d8f4 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -9,6 +9,7 @@
 #include <linux/sysctl.h>
 #include <linux/in6.h>
 #include <linux/ipv6.h>
+#include <linux/slab.h>
 #include <net/ndisc.h>
 #include <net/ipv6.h>
 #include <net/addrconf.h>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 9b6dbba..c92ebe8 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -38,6 +38,7 @@
 #include <linux/jhash.h>
 #include <linux/ipsec.h>
 #include <linux/times.h>
+#include <linux/slab.h>
 
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c
index e17bc1d..fc3c86a 100644
--- a/net/ipv6/tunnel6.c
+++ b/net/ipv6/tunnel6.c
@@ -25,6 +25,7 @@
 #include <linux/mutex.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 #include <net/ipv6.h>
 #include <net/protocol.h>
 #include <net/xfrm.h>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3c0c9c7..c177aea 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -34,6 +34,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 #include <asm/uaccess.h>
 
 #include <net/ndisc.h>
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index 3927832..b809812 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -5,6 +5,7 @@
  * Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
  */
 
+#include <linux/gfp.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index fa85a7d..2ce3a82 100644
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -23,6 +23,7 @@
  */
 #include <linux/module.h>
 #include <linux/xfrm.h>
+#include <linux/slab.h>
 #include <linux/rculist.h>
 #include <net/ip.h>
 #include <net/xfrm.h>