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>
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 60ec4e4..78b505d 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -19,6 +19,7 @@
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/mutex.h>
+#include <linux/slab.h>
#include <net/net_namespace.h>
#include <net/sock.h>
diff --git a/net/netfilter/ipvs/ip_vs_app.c b/net/netfilter/ipvs/ip_vs_app.c
index 3c7e427..1cb0e83 100644
--- a/net/netfilter/ipvs/ip_vs_app.c
+++ b/net/netfilter/ipvs/ip_vs_app.c
@@ -27,6 +27,7 @@
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
+#include <linux/slab.h>
#include <net/net_namespace.h>
#include <net/protocol.h>
#include <net/tcp.h>
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 60bb41a..d8f7e8e 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -32,6 +32,7 @@
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h> /* for proc_net_* */
+#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/jhash.h>
#include <linux/random.h>
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 4459088..1cd6e3f 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -33,6 +33,7 @@
#include <linux/tcp.h>
#include <linux/sctp.h>
#include <linux/icmp.h>
+#include <linux/slab.h>
#include <net/ip.h>
#include <net/tcp.h>
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 7ee9c34..36dc1d8 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -31,6 +31,7 @@
#include <linux/workqueue.h>
#include <linux/swap.h>
#include <linux/seq_file.h>
+#include <linux/slab.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
diff --git a/net/netfilter/ipvs/ip_vs_dh.c b/net/netfilter/ipvs/ip_vs_dh.c
index fe3e188..95fd0d1 100644
--- a/net/netfilter/ipvs/ip_vs_dh.c
+++ b/net/netfilter/ipvs/ip_vs_dh.c
@@ -39,6 +39,7 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/ip.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index 702b53c..ff28801 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -17,7 +17,6 @@
#include <linux/kernel.h>
#include <linux/jiffies.h>
-#include <linux/slab.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/sysctl.h>
diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
index 73f38ea..2c7f185 100644
--- a/net/netfilter/ipvs/ip_vs_ftp.c
+++ b/net/netfilter/ipvs/ip_vs_ftp.c
@@ -32,6 +32,7 @@
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
+#include <linux/gfp.h>
#include <net/protocol.h>
#include <net/tcp.h>
#include <asm/unaligned.h>
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index 1b9370d..94a4521 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -43,6 +43,7 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/ip.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index caa58fa..535dc2b 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -46,6 +46,7 @@
#include <linux/skbuff.h>
#include <linux/jiffies.h>
#include <linux/list.h>
+#include <linux/slab.h>
/* for sysctl */
#include <linux/fs.h>
diff --git a/net/netfilter/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
index 0e58455..7fc49f4 100644
--- a/net/netfilter/ipvs/ip_vs_proto.c
+++ b/net/netfilter/ipvs/ip_vs_proto.c
@@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include <linux/gfp.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <net/protocol.h>
diff --git a/net/netfilter/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c
index 8e6cfd3..e6cc174 100644
--- a/net/netfilter/ipvs/ip_vs_sh.c
+++ b/net/netfilter/ipvs/ip_vs_sh.c
@@ -36,6 +36,7 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/ip.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
diff --git a/net/netfilter/ipvs/ip_vs_wrr.c b/net/netfilter/ipvs/ip_vs_wrr.c
index 3c115fc..30db633 100644
--- a/net/netfilter/ipvs/ip_vs_wrr.c
+++ b/net/netfilter/ipvs/ip_vs_wrr.c
@@ -23,6 +23,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/net.h>
#include <linux/gcd.h>
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 223b501..e450cd6 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -17,6 +17,7 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/tcp.h> /* for tcphdr */
#include <net/ip.h>
#include <net/tcp.h> /* for csum_tcpudp_magic */
diff --git a/net/netfilter/nf_conntrack_acct.c b/net/netfilter/nf_conntrack_acct.c
index 018f90d..ab81b38 100644
--- a/net/netfilter/nf_conntrack_acct.c
+++ b/net/netfilter/nf_conntrack_acct.c
@@ -9,6 +9,7 @@
*/
#include <linux/netfilter.h>
+#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index 07d9d88..372e80f 100644
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -16,6 +16,7 @@
#include <linux/in.h>
#include <linux/udp.h>
#include <linux/netfilter.h>
+#include <linux/gfp.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_expect.h>
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index d5a9bcd..f516961 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -18,6 +18,7 @@
#include <linux/percpu.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
+#include <linux/slab.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index f0732aa..2ae3169 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -13,6 +13,7 @@
#include <linux/moduleparam.h>
#include <linux/netfilter.h>
#include <linux/ip.h>
+#include <linux/slab.h>
#include <linux/ipv6.h>
#include <linux/ctype.h>
#include <linux/inet.h>
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index a1c8dd9..a487c80 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -17,6 +17,7 @@
#include <linux/inet.h>
#include <linux/in.h>
#include <linux/ip.h>
+#include <linux/slab.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index 4509fa6..59e1a4c 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -15,7 +15,6 @@
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <linux/stddef.h>
-#include <linux/slab.h>
#include <linux/random.h>
#include <linux/err.h>
#include <linux/kernel.h>
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 8bd98c8..7673930 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -15,6 +15,7 @@
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/netfilter.h>
+#include <linux/slab.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_expect.h>
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 569410a..afc52f2 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -27,6 +27,7 @@
#include <linux/netlink.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/slab.h>
#include <linux/netfilter.h>
#include <net/netlink.h>
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index 1a4568b..a44fa75 100644
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index 9a28155..5292560 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -15,6 +15,7 @@
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/dccp.h>
+#include <linux/slab.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index d899b1a..cf616e5 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -31,6 +31,7 @@
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <net/dst.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c
index dcfecbb..d9e2773 100644
--- a/net/netfilter/nf_conntrack_sane.c
+++ b/net/netfilter/nf_conntrack_sane.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/netfilter.h>
+#include <linux/slab.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <net/netfilter/nf_conntrack.h>
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 24a42ef..faa8eb3 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -8,6 +8,7 @@
#include <linux/types.h>
#include <linux/netfilter.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index ba095fd..c49ef21 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -1,4 +1,5 @@
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index d9b8fb8..203643f 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -28,6 +28,7 @@
#include <linux/list.h>
#include <linux/jhash.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include <net/sock.h>
#include <net/netfilter/nf_log.h>
#include <net/netfilter/nfnetlink_log.h>
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 7ba4abc..e70a6ef 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -18,6 +18,7 @@
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/spinlock.h>
+#include <linux/slab.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 0a12ced..665f5be 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -22,6 +22,7 @@
#include <linux/vmalloc.h>
#include <linux/mutex.h>
#include <linux/mm.h>
+#include <linux/slab.h>
#include <net/net_namespace.h>
#include <linux/netfilter/x_tables.h>
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index 61c50fa..ee18b23 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -7,6 +7,7 @@
*/
#include <linux/module.h>
+#include <linux/gfp.h>
#include <linux/skbuff.h>
#include <linux/selinux.h>
#include <linux/netfilter_ipv4/ip_tables.h>
diff --git a/net/netfilter/xt_LED.c b/net/netfilter/xt_LED.c
index 8ff7843..3271c8e 100644
--- a/net/netfilter/xt_LED.c
+++ b/net/netfilter/xt_LED.c
@@ -22,6 +22,7 @@
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter/x_tables.h>
+#include <linux/slab.h>
#include <linux/leds.h>
#include <linux/mutex.h>
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index 87ae97e..d16d55df 100644
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -11,6 +11,7 @@
#include <linux/jhash.h>
#include <linux/rtnetlink.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include <net/gen_stats.h>
#include <net/netlink.h>
diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index 0e357ac..c5f4b99 100644
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
+#include <linux/gfp.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <net/dst.h>
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index 26997ce..388ca45 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -17,6 +17,7 @@
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/jhash.h>
+#include <linux/slab.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/random.h>
diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 0989f29a..395af59 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <net/ip.h>
#include <linux/dccp.h>
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index a0ca533..e5d7e1f 100644
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -6,6 +6,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
diff --git a/net/netfilter/xt_quota.c b/net/netfilter/xt_quota.c
index 390b7d0..2d55624 100644
--- a/net/netfilter/xt_quota.c
+++ b/net/netfilter/xt_quota.c
@@ -4,6 +4,7 @@
* Sam Johnston <samj@samj.net>
*/
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/netfilter/x_tables.h>
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 971d172..834b736 100644
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -27,6 +27,7 @@
#include <linux/bitops.h>
#include <linux/skbuff.h>
#include <linux/inet.h>
+#include <linux/slab.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index d8c0f8f..937ce06 100644
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -12,6 +12,7 @@
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/net.h>
+#include <linux/slab.h>
#include <linux/netfilter/xt_statistic.h>
#include <linux/netfilter/x_tables.h>
diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index b4d7741..96801ff 100644
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -7,6 +7,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>