Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system

Pull "Disintegrate and delete asm/system.h" from David Howells:
 "Here are a bunch of patches to disintegrate asm/system.h into a set of
  separate bits to relieve the problem of circular inclusion
  dependencies.

  I've built all the working defconfigs from all the arches that I can
  and made sure that they don't break.

  The reason for these patches is that I recently encountered a circular
  dependency problem that came about when I produced some patches to
  optimise get_order() by rewriting it to use ilog2().

  This uses bitops - and on the SH arch asm/bitops.h drags in
  asm-generic/get_order.h by a circuituous route involving asm/system.h.

  The main difficulty seems to be asm/system.h.  It holds a number of
  low level bits with no/few dependencies that are commonly used (eg.
  memory barriers) and a number of bits with more dependencies that
  aren't used in many places (eg.  switch_to()).

  These patches break asm/system.h up into the following core pieces:

    (1) asm/barrier.h

        Move memory barriers here.  This already done for MIPS and Alpha.

    (2) asm/switch_to.h

        Move switch_to() and related stuff here.

    (3) asm/exec.h

        Move arch_align_stack() here.  Other process execution related bits
        could perhaps go here from asm/processor.h.

    (4) asm/cmpxchg.h

        Move xchg() and cmpxchg() here as they're full word atomic ops and
        frequently used by atomic_xchg() and atomic_cmpxchg().

    (5) asm/bug.h

        Move die() and related bits.

    (6) asm/auxvec.h

        Move AT_VECTOR_SIZE_ARCH here.

  Other arch headers are created as needed on a per-arch basis."

Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that.  We'll find out anything that got broken and fix it..

* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
  Delete all instances of asm/system.h
  Remove all #inclusions of asm/system.h
  Add #includes needed to permit the removal of asm/system.h
  Move all declarations of free_initmem() to linux/mm.h
  Disintegrate asm/system.h for OpenRISC
  Split arch_align_stack() out from asm-generic/system.h
  Split the switch_to() wrapper out of asm-generic/system.h
  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
  Create asm-generic/barrier.h
  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
  Disintegrate asm/system.h for Xtensa
  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
  Disintegrate asm/system.h for Tile
  Disintegrate asm/system.h for Sparc
  Disintegrate asm/system.h for SH
  Disintegrate asm/system.h for Score
  Disintegrate asm/system.h for S390
  Disintegrate asm/system.h for PowerPC
  Disintegrate asm/system.h for PA-RISC
  Disintegrate asm/system.h for MN10300
  ...

13 files changed, 6 insertions, 7 deletions

diff --git a/arch/cris/arch-v10/drivers/ds1302.c b/arch/cris/arch-v10/drivers/ds1302.c
index 3d655dcc65da..74f99c688c8d 100644
--- a/arch/cris/arch-v10/drivers/ds1302.c
+++ b/arch/cris/arch-v10/drivers/ds1302.c
@@ -24,7 +24,6 @@
 #include <linux/capability.h>
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 #include <arch/svinto.h>
 #include <asm/io.h>
 #include <asm/rtc.h>
diff --git a/arch/cris/arch-v10/drivers/gpio.c b/arch/cris/arch-v10/drivers/gpio.c
index a276f0811731..609d5510410e 100644
--- a/arch/cris/arch-v10/drivers/gpio.c
+++ b/arch/cris/arch-v10/drivers/gpio.c
@@ -24,7 +24,6 @@
 #include <asm/etraxgpio.h>
 #include <arch/svinto.h>
 #include <asm/io.h>
-#include <asm/system.h>
 #include <asm/irq.h>
 #include <arch/io_interface_mux.h>
 
diff --git a/arch/cris/arch-v10/drivers/i2c.c b/arch/cris/arch-v10/drivers/i2c.c
index c413539d4205..b3d1f9ed1b98 100644
--- a/arch/cris/arch-v10/drivers/i2c.c
+++ b/arch/cris/arch-v10/drivers/i2c.c
@@ -22,7 +22,6 @@
 
 #include <asm/etraxi2c.h>
 
-#include <asm/system.h>
 #include <arch/svinto.h>
 #include <asm/io.h>
 #include <asm/delay.h>
diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c
index 1391b731ad1c..9da056860c92 100644
--- a/arch/cris/arch-v10/drivers/pcf8563.c
+++ b/arch/cris/arch-v10/drivers/pcf8563.c
@@ -29,7 +29,6 @@
 #include <linux/mutex.h>
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 #include <asm/io.h>
 #include <asm/rtc.h>
 
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index 466af40c5822..c4b71710fb0e 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -27,7 +27,6 @@
 #include <asm/io.h>
 #include <arch/svinto.h>
 #include <asm/uaccess.h>
-#include <asm/system.h>
 #include <asm/sync_serial.h>
 #include <arch/io_interface_mux.h>
 
diff --git a/arch/cris/arch-v10/kernel/debugport.c b/arch/cris/arch-v10/kernel/debugport.c
index 99851ba8e5fa..f932c85fbde4 100644
--- a/arch/cris/arch-v10/kernel/debugport.c
+++ b/arch/cris/arch-v10/kernel/debugport.c
@@ -18,7 +18,6 @@
 #include <linux/major.h>
 #include <linux/delay.h>
 #include <linux/tty.h>
-#include <asm/system.h>
 #include <arch/svinto.h>
 #include <asm/io.h>             /* Get SIMCOUT. */
 
diff --git a/arch/cris/arch-v10/kernel/dma.c b/arch/cris/arch-v10/kernel/dma.c
index d31504b4a19e..5795047359b2 100644
--- a/arch/cris/arch-v10/kernel/dma.c
+++ b/arch/cris/arch-v10/kernel/dma.c
@@ -8,6 +8,7 @@
 
 #include <asm/dma.h>
 #include <arch/svinto.h>
+#include <arch/system.h>
 
 /* Macro to access ETRAX 100 registers */
 #define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
diff --git a/arch/cris/arch-v10/kernel/io_interface_mux.c b/arch/cris/arch-v10/kernel/io_interface_mux.c
index 29f97e962795..ad64cd1c861a 100644
--- a/arch/cris/arch-v10/kernel/io_interface_mux.c
+++ b/arch/cris/arch-v10/kernel/io_interface_mux.c
@@ -14,6 +14,7 @@
 #include <arch/svinto.h>
 #include <asm/io.h>
 #include <arch/io_interface_mux.h>
+#include <arch/system.h>
 
 
 #define DBG(s)
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index 9a57db6907f5..bee8df43c201 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c
@@ -16,6 +16,7 @@
 #include <linux/fs.h>
 #include <arch/svinto.h>
 #include <linux/init.h>
+#include <arch/system.h>
 
 #ifdef CONFIG_ETRAX_GPIO
 void etrax_gpio_wake_up_check(void); /* drivers/gpio.c */
diff --git a/arch/cris/arch-v10/kernel/ptrace.c b/arch/cris/arch-v10/kernel/ptrace.c
index 320065f3cbe5..bfddfb99401f 100644
--- a/arch/cris/arch-v10/kernel/ptrace.c
+++ b/arch/cris/arch-v10/kernel/ptrace.c
@@ -15,7 +15,6 @@
 #include <asm/uaccess.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
-#include <asm/system.h>
 #include <asm/processor.h>
 
 /* 
diff --git a/arch/cris/arch-v10/kernel/setup.c b/arch/cris/arch-v10/kernel/setup.c
index de27b50b72a2..4f96d71b5154 100644
--- a/arch/cris/arch-v10/kernel/setup.c
+++ b/arch/cris/arch-v10/kernel/setup.c
@@ -14,6 +14,7 @@
 #include <linux/proc_fs.h>
 #include <linux/delay.h>
 #include <linux/param.h>
+#include <arch/system.h>
 
 #ifdef CONFIG_PROC_FS
 #define HAS_FPU		0x0001
diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c
index e78fe49a9849..289c584ba499 100644
--- a/arch/cris/arch-v10/kernel/signal.c
+++ b/arch/cris/arch-v10/kernel/signal.c
@@ -27,6 +27,7 @@
 #include <asm/processor.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
+#include <arch/system.h>
 
 #define DEBUG_SIG 0
 
diff --git a/arch/cris/arch-v10/kernel/traps.c b/arch/cris/arch-v10/kernel/traps.c
index 8bebb96bbca1..7001beda716c 100644
--- a/arch/cris/arch-v10/kernel/traps.c
+++ b/arch/cris/arch-v10/kernel/traps.c
@@ -11,6 +11,7 @@
 #include <linux/ptrace.h>
 #include <asm/uaccess.h>
 #include <arch/sv_addr_ag.h>
+#include <arch/system.h>
 
 void
 show_registers(struct pt_regs *regs)