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, 16 insertions, 7 deletions

diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c
index f845d9d72f73..1419d0cdbbac 100644
--- a/net/sunrpc/addr.c
+++ b/net/sunrpc/addr.c
@@ -18,6 +18,7 @@
 
 #include <net/ipv6.h>
 #include <linux/sunrpc/clnt.h>
+#include <linux/slab.h>
 
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 
diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c
index bf88bf8e9365..8f623b0f03dd 100644
--- a/net/sunrpc/auth_generic.c
+++ b/net/sunrpc/auth_generic.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/err.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/sched.h>
diff --git a/net/sunrpc/auth_gss/gss_generic_token.c b/net/sunrpc/auth_gss/gss_generic_token.c
index c0ba39c4f5f2..310b78e99456 100644
--- a/net/sunrpc/auth_gss/gss_generic_token.c
+++ b/net/sunrpc/auth_gss/gss_generic_token.c
@@ -33,7 +33,6 @@
 
 #include <linux/types.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/sunrpc/sched.h>
 #include <linux/sunrpc/gss_asn1.h>
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index c93fca204558..e9b636176687 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -37,7 +37,6 @@
 #include <linux/err.h>
 #include <linux/types.h>
 #include <linux/mm.h>
-#include <linux/slab.h>
 #include <linux/scatterlist.h>
 #include <linux/crypto.h>
 #include <linux/highmem.h>
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index b8f42ef7178e..88fe6e75ed7e 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -59,7 +59,6 @@
  */
 
 #include <linux/types.h>
-#include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/sunrpc/gss_krb5.h>
 #include <linux/random.h>
diff --git a/net/sunrpc/auth_gss/gss_krb5_seqnum.c b/net/sunrpc/auth_gss/gss_krb5_seqnum.c
index 17562b4c35f6..6331cd6866ec 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seqnum.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seqnum.c
@@ -32,7 +32,6 @@
  */
 
 #include <linux/types.h>
-#include <linux/slab.h>
 #include <linux/sunrpc/gss_krb5.h>
 #include <linux/crypto.h>
 
diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c
index 066ec73c84d6..ce6c247edad0 100644
--- a/net/sunrpc/auth_gss/gss_krb5_unseal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c
@@ -58,7 +58,6 @@
  */
 
 #include <linux/types.h>
-#include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/sunrpc/gss_krb5.h>
 #include <linux/crypto.h>
diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index ae8e69b59c4c..a6e905637e03 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -1,5 +1,4 @@
 #include <linux/types.h>
-#include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/sunrpc/gss_krb5.h>
 #include <linux/random.h>
diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c
index c832712f8d55..5a3a65a0e2b4 100644
--- a/net/sunrpc/auth_gss/gss_spkm3_seal.c
+++ b/net/sunrpc/auth_gss/gss_spkm3_seal.c
@@ -34,7 +34,6 @@
  */
 
 #include <linux/types.h>
-#include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/sunrpc/gss_spkm3.h>
 #include <linux/random.h>
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index e34bc531fcb9..b81e790ef9f4 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -37,6 +37,7 @@
  *
  */
 
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pagemap.h>
diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 46b2647c5bd2..aac2f8b4ee21 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -6,6 +6,7 @@
  * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
  */
 
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/module.h>
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index 553621fb2c41..cf06af3b63c6 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -22,6 +22,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/
 
 #include <linux/tcp.h>
+#include <linux/slab.h>
 #include <linux/sunrpc/xprt.h>
 
 #ifdef RPC_DEBUG
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index 3e3772d8eb92..121105355f60 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -21,6 +21,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/mutex.h>
+#include <linux/slab.h>
 #include <net/ipv6.h>
 
 #include <linux/sunrpc/clnt.h>
diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c
index a661a3acb37e..10b4319ebbca 100644
--- a/net/sunrpc/socklib.c
+++ b/net/sunrpc/socklib.c
@@ -8,6 +8,7 @@
 
 #include <linux/compiler.h>
 #include <linux/netdevice.h>
+#include <linux/gfp.h>
 #include <linux/skbuff.h>
 #include <linux/types.h>
 #include <linux/pagemap.h>
diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
index 1b4e6791ecf3..5785d2037f45 100644
--- a/net/sunrpc/stats.c
+++ b/net/sunrpc/stats.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 
 #include <linux/init.h>
 #include <linux/kernel.h>
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 8420a4205b76..d9017d64597e 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -19,6 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/kthread.h>
+#include <linux/slab.h>
 
 #include <linux/sunrpc/types.h>
 #include <linux/sunrpc/xdr.h>
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 8f0f1fb3dc52..061b2e0f9118 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -9,6 +9,7 @@
 #include <linux/errno.h>
 #include <linux/freezer.h>
 #include <linux/kthread.h>
+#include <linux/slab.h>
 #include <net/sock.h>
 #include <linux/sunrpc/stats.h>
 #include <linux/sunrpc/svc_xprt.h>
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index afdcb0459a83..207311610988 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -10,6 +10,7 @@
 #include <linux/seq_file.h>
 #include <linux/hash.h>
 #include <linux/string.h>
+#include <linux/slab.h>
 #include <net/sock.h>
 #include <net/ipv6.h>
 #include <linux/kernel.h>
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 8bd690c48b69..2763fde88499 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c
index 5b8a8ff93a25..d718b8fa9525 100644
--- a/net/sunrpc/xprtrdma/svc_rdma.c
+++ b/net/sunrpc/xprtrdma/svc_rdma.c
@@ -40,6 +40,7 @@
  */
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/sysctl.h>
 #include <linux/sunrpc/clnt.h>
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 3fa5751af0ec..fd90eb89842b 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -43,6 +43,7 @@
 #include <linux/sunrpc/debug.h>
 #include <linux/sunrpc/rpc_rdma.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <rdma/ib_verbs.h>
 #include <rdma/rdma_cm.h>
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index f96c2fe6137b..187257b1d880 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -49,6 +49,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/seq_file.h>
 
 #include "xprt_rdma.h"
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 2209aa87d899..27015c6d8eb5 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -48,6 +48,7 @@
  */
 
 #include <linux/pci.h>	/* for Tavor hack below */
+#include <linux/slab.h>
 
 #include "xprt_rdma.h"