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authorTejun Heo <tj@kernel.org>2010-03-24 17:04:11 +0900
committerTejun Heo <tj@kernel.org>2010-03-30 22:02:32 +0900
commit5a0e3ad6af8660be21ca98a971cd00f331318c05 (patch)
tree5bfb7be11a03176a87296a43ac6647975c00a1d1 /net/dccp
parented391f4ebf8f701d3566423ce8f17e614cde9806 (diff)
downloadvexpress-lsk-5a0e3ad6af8660be21ca98a971cd00f331318c05.tar.gz
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>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ccid.c2
-rw-r--r--net/dccp/ccids/ccid2.c1
-rw-r--r--net/dccp/feat.c1
-rw-r--r--net/dccp/input.c1
-rw-r--r--net/dccp/ipv4.c1
-rw-r--r--net/dccp/ipv6.c1
-rw-r--r--net/dccp/minisocks.c1
-rw-r--r--net/dccp/output.c1
-rw-r--r--net/dccp/probe.c1
-rw-r--r--net/dccp/proto.c1
10 files changed, 11 insertions, 0 deletions
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index 49d27c556be..36479ca61e0 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -11,6 +11,8 @@
* published by the Free Software Foundation.
*/
+#include <linux/slab.h>
+
#include "ccid.h"
#include "ccids/lib/tfrc.h"
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index a47a8c918ee..9b3ae9922be 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -23,6 +23,7 @@
/*
* This implementation should follow RFC 4341
*/
+#include <linux/slab.h>
#include "../feat.h"
#include "../ccid.h"
#include "../dccp.h"
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index 972b8dc918d..df7dd26cf07 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -22,6 +22,7 @@
* 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
+#include <linux/slab.h>
#include "ccid.h"
#include "feat.h"
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 7648f316310..9ec71742602 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -12,6 +12,7 @@
#include <linux/dccp.h>
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <net/sock.h>
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 4071eaf2b36..52ffa1cde15 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -12,6 +12,7 @@
#include <linux/dccp.h>
#include <linux/icmp.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/random.h>
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index af3394df63b..3b11e41a292 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include <linux/xfrm.h>
#include <net/addrconf.h>
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 0d508c359fa..128b089d3ae 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -11,6 +11,7 @@
*/
#include <linux/dccp.h>
+#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
diff --git a/net/dccp/output.c b/net/dccp/output.c
index d6bb753bf6a..fc3f436440b 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -13,6 +13,7 @@
#include <linux/dccp.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include <linux/slab.h>
#include <net/inet_sock.h>
#include <net/sock.h>
diff --git a/net/dccp/probe.c b/net/dccp/probe.c
index f5b3464f124..078e48d442f 100644
--- a/net/dccp/probe.c
+++ b/net/dccp/probe.c
@@ -30,6 +30,7 @@
#include <linux/module.h>
#include <linux/kfifo.h>
#include <linux/vmalloc.h>
+#include <linux/gfp.h>
#include <net/net_namespace.h>
#include "dccp.h"
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index aa4cef374fd..a0e38d8018f 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -20,6 +20,7 @@
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/random.h>
+#include <linux/slab.h>
#include <net/checksum.h>
#include <net/inet_sock.h>