Detach sched.h from mm.h

First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.

This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
   getting them indirectly

Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
   they don't need sched.h
b) sched.h stops being dependency for significant number of files:
   on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
   after patch it's only 3744 (-8.3%).

Cross-compile tested on

	all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
	alpha alpha-up
	arm
	i386 i386-up i386-defconfig i386-allnoconfig
	ia64 ia64-up
	m68k
	mips
	parisc parisc-up
	powerpc powerpc-up
	s390 s390-up
	sparc sparc-up
	sparc64 sparc64-up
	um-x86_64
	x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig

as well as my two usual configs.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

22 files changed, 22 insertions, 3 deletions

diff --git a/drivers/base/dmapool.c b/drivers/base/dmapool.c
index 9406259754a..91970e9bb05 100644
--- a/drivers/base/dmapool.c
+++ b/drivers/base/dmapool.c
@@ -8,6 +8,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/poison.h>
+#include <linux/sched.h>
 
 /*
  * Pool allocator ... wraps the dma_alloc_coherent page allocator, so
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
index 679d7f97243..c7ed617aa7f 100644
--- a/drivers/char/agp/frontend.c
+++ b/drivers/char/agp/frontend.c
@@ -37,6 +37,7 @@
 #include <linux/agpgart.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
+#include <linux/sched.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include "agp.h"
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 45aeb917ec6..d535c406b31 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -37,6 +37,7 @@
 #include <linux/vmalloc.h>
 #include <linux/dma-mapping.h>
 #include <linux/mm.h>
+#include <linux/sched.h>
 #include <asm/io.h>
 #include <asm/cacheflush.h>
 #include <asm/pgtable.h>
diff --git a/drivers/char/hangcheck-timer.c b/drivers/char/hangcheck-timer.c
index f0e7263dfcd..0e8ceea5ea7 100644
--- a/drivers/char/hangcheck-timer.c
+++ b/drivers/char/hangcheck-timer.c
@@ -48,7 +48,7 @@
 #include <linux/delay.h>
 #include <asm/uaccess.h>
 #include <linux/sysrq.h>
-
+#include <linux/timer.h>
 
 #define VERSION_STR "0.9.0"
 
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 558c9a0fc8b..e85f7013de5 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/slab.h>
+#include <linux/workqueue.h>
 
 #include <rdma/ib_cache.h>
 
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 592c90aa318..bcecf4ddbf0 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -40,6 +40,7 @@
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 
 #include "core_priv.h"
 
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index f32ca5fbb26..96a16c0c08f 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -36,6 +36,7 @@
 
 #include <linux/mm.h>
 #include <linux/dma-mapping.h>
+#include <linux/sched.h>
 
 #include "uverbs.h"
 
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 71314460b11..38102520ffb 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -37,6 +37,7 @@
 #include <linux/completion.h>
 #include <linux/pci.h>
 #include <linux/errno.h>
+#include <linux/sched.h>
 #include <asm/io.h>
 #include <rdma/ib_mad.h>
 
diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index ca224d018af..be6e1e03bda 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -37,6 +37,7 @@
  */
 
 #include <linux/hardirq.h>
+#include <linux/sched.h>
 
 #include <asm/io.h>
 
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 48f7c65e9ae..e61f3e62698 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -36,6 +36,7 @@
 
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
+#include <linux/sched.h>
 
 #include <asm/page.h>
 
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index 72fabb822f1..2741ded8929 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -37,6 +37,7 @@
 
 #include <linux/string.h>
 #include <linux/slab.h>
+#include <linux/sched.h>
 
 #include <asm/io.h>
 
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index 61974b0296c..b8f05a52667 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -34,6 +34,7 @@
 
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/sched.h>
 
 #include <asm/io.h>
 
diff --git a/drivers/isdn/icn/icn.c b/drivers/isdn/icn/icn.c
index 1e699bcaba0..82d957bde29 100644
--- a/drivers/isdn/icn/icn.c
+++ b/drivers/isdn/icn/icn.c
@@ -12,6 +12,7 @@
 #include "icn.h"
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 
 static int portbase = ICN_BASEADDR;
 static unsigned long membase = ICN_MEMADDR;
diff --git a/drivers/isdn/sc/message.c b/drivers/isdn/sc/message.c
index c5a307e3c49..0b4c4f15abd 100644
--- a/drivers/isdn/sc/message.c
+++ b/drivers/isdn/sc/message.c
@@ -16,7 +16,7 @@
  *     +1 (416) 297-8565
  *     +1 (416) 297-6433 Facsimile
  */
-
+#include <linux/sched.h>
 #include "includes.h"
 #include "hardware.h"
 #include "message.h"
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 41634fde8e1..1c040d80c64 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -11,6 +11,7 @@
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
 #include <linux/mm.h>
+#include <asm/signal.h>
 
 #include "vmx.h"
 #include <linux/kvm.h>
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 0d892600ff0..da985b31b17 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -40,6 +40,7 @@
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
+#include <linux/sched.h>
 
 #include "x86_emulate.h"
 #include "segment_descriptor.h"
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 9c15f32eea1..fa17d6d4f0c 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -19,6 +19,7 @@
 #include <linux/vmalloc.h>
 #include <linux/highmem.h>
 #include <linux/profile.h>
+#include <linux/sched.h>
 #include <asm/desc.h>
 
 #include "kvm_svm.h"
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 724db0027f0..e6e4d240b2a 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -22,6 +22,7 @@
 #include <linux/mm.h>
 #include <linux/highmem.h>
 #include <linux/profile.h>
+#include <linux/sched.h>
 #include <asm/io.h>
 #include <asm/desc.h>
 
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 78c2e6e4b42..edd6de99572 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -26,6 +26,7 @@
 #include <linux/profile.h>
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/sched.h>
  
 #include "oprofile_stats.h"
 #include "event_buffer.h"
diff --git a/drivers/pci/hotplug/ibmphp_hpc.c b/drivers/pci/hotplug/ibmphp_hpc.c
index 46abaa8c41f..d06ccb69e41 100644
--- a/drivers/pci/hotplug/ibmphp_hpc.c
+++ b/drivers/pci/hotplug/ibmphp_hpc.c
@@ -34,6 +34,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
+#include <linux/sched.h>
 
 #include "ibmphp.h"
 
diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h
index bf655dbaf8e..5cca394d599 100644
--- a/drivers/pci/pcie/aer/aerdrv.h
+++ b/drivers/pci/pcie/aer/aerdrv.h
@@ -8,6 +8,7 @@
 #ifndef _AERDRV_H_
 #define _AERDRV_H_
 
+#include <linux/workqueue.h>
 #include <linux/pcieport_if.h>
 #include <linux/aer.h>
 
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
index e075a52ac10..84d9c27133d 100644
--- a/drivers/scsi/megaraid/megaraid_mm.c
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -14,7 +14,7 @@
  *
  * Common management module
  */
-
+#include <linux/sched.h>
 #include "megaraid_mm.h"