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
  ...

26 files changed, 5 insertions, 24 deletions

diff --git a/arch/mips/kernel/cpu-bugs64.c b/arch/mips/kernel/cpu-bugs64.c
index f305ca14351b..d6a18644365a 100644
--- a/arch/mips/kernel/cpu-bugs64.c
+++ b/arch/mips/kernel/cpu-bugs64.c
@@ -16,7 +16,7 @@
 #include <asm/cpu.h>
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
+#include <asm/setup.h>
 
 static char bug64hit[] __initdata =
 	"reliable operation impossible!\n%s";
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 0bab464b8e33..5099201fb7bc 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -22,7 +22,6 @@
 #include <asm/cpu.h>
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
 #include <asm/watch.h>
 #include <asm/elf.h>
 #include <asm/spram.h>
diff --git a/arch/mips/kernel/irq-rm7000.c b/arch/mips/kernel/irq-rm7000.c
index a8a8977d5887..b0662cf97ea8 100644
--- a/arch/mips/kernel/irq-rm7000.c
+++ b/arch/mips/kernel/irq-rm7000.c
@@ -16,7 +16,6 @@
 
 #include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
 
 static inline void unmask_rm7k_irq(struct irq_data *d)
 {
diff --git a/arch/mips/kernel/irq-rm9000.c b/arch/mips/kernel/irq-rm9000.c
index 38874a4b9255..1282b9ae81c4 100644
--- a/arch/mips/kernel/irq-rm9000.c
+++ b/arch/mips/kernel/irq-rm9000.c
@@ -17,7 +17,6 @@
 
 #include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
 
 static inline void unmask_rm9k_irq(struct irq_data *d)
 {
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 7f50318061b5..a5aa43d07c8e 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -23,7 +23,6 @@
 #include <linux/ftrace.h>
 
 #include <linux/atomic.h>
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #ifdef CONFIG_KGDB
diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
index 191eb52228c4..972263bcf403 100644
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c
@@ -35,7 +35,6 @@
 #include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
 #include <asm/mipsmtregs.h>
-#include <asm/system.h>
 
 static inline void unmask_mips_irq(struct irq_data *d)
 {
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index c23d11f6851d..7f3376b1c219 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -13,7 +13,6 @@
 #include <asm/cpu.h>
 #include <asm/processor.h>
 #include <linux/atomic.h>
-#include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
 #include <asm/mipsmtregs.h>
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 61f1cb45a1d5..e9a5fd7277f4 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -32,7 +32,6 @@
 #include <asm/dsp.h>
 #include <asm/fpu.h>
 #include <asm/pgtable.h>
-#include <asm/system.h>
 #include <asm/mipsregs.h>
 #include <asm/processor.h>
 #include <asm/uaccess.h>
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 7786b608d932..7c24c2973c6d 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -34,7 +34,6 @@
 #include <asm/mipsmtregs.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/bootinfo.h>
 #include <asm/reg.h>
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 32644b4a0714..a3b017815eff 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -32,7 +32,6 @@
 #include <asm/mipsmtregs.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/bootinfo.h>
 
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index a9d801dec6b0..b8c18dcdd2c4 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -38,7 +38,6 @@
 #include <linux/atomic.h>
 #include <asm/cpu.h>
 #include <asm/processor.h>
-#include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/rtlx.h>
 
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 058e964e7303..c504b212f8f3 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -31,7 +31,6 @@
 #include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/smp-ops.h>
-#include <asm/system.h>
 #include <asm/prom.h>
 
 struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index f8524003676a..185ca00c4c84 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -34,6 +34,7 @@
 #include <asm/cpu-features.h>
 #include <asm/war.h>
 #include <asm/vdso.h>
+#include <asm/dsp.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index aae986613795..06b5da392e24 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -29,10 +29,10 @@
 #include <asm/cacheflush.h>
 #include <asm/sim.h>
 #include <asm/ucontext.h>
-#include <asm/system.h>
 #include <asm/fpu.h>
 #include <asm/war.h>
 #include <asm/vdso.h>
+#include <asm/dsp.h>
 
 #include "signal-common.h"
 
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index ee24d814d5b9..ae29e894ab8d 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -35,7 +35,6 @@
 #include <asm/sim.h>
 #include <asm/uaccess.h>
 #include <asm/ucontext.h>
-#include <asm/system.h>
 #include <asm/fpu.h>
 #include <asm/cpu-features.h>
 #include <asm/war.h>
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index d5e950ab8527..ca673569fd24 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -28,7 +28,6 @@
 #include <asm/time.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
-#include <asm/system.h>
 #include <asm/bootinfo.h>
 #include <asm/pmon.h>
 #include <asm/cacheflush.h>
diff --git a/arch/mips/kernel/smp-cmp.c b/arch/mips/kernel/smp-cmp.c
index fe3095160655..e7e03ecf5495 100644
--- a/arch/mips/kernel/smp-cmp.c
+++ b/arch/mips/kernel/smp-cmp.c
@@ -29,7 +29,6 @@
 #include <asm/cacheflush.h>
 #include <asm/cpu.h>
 #include <asm/processor.h>
-#include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
 #include <asm/smp.h>
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index ce9e286f0a74..ff17868734cf 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -28,7 +28,6 @@
 #include <asm/cacheflush.h>
 #include <asm/cpu.h>
 #include <asm/processor.h>
-#include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
 #include <asm/time.h>
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 32c1e954cd37..9c1cce9de35f 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -38,9 +38,9 @@
 #include <asm/cpu.h>
 #include <asm/processor.h>
 #include <asm/r4k-timer.h>
-#include <asm/system.h>
 #include <asm/mmu_context.h>
 #include <asm/time.h>
+#include <asm/setup.h>
 
 #ifdef CONFIG_MIPS_MT_SMTC
 #include <asm/mipsmtregs.h>
diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c
index 928a5a61e1a6..145771c0ed7a 100644
--- a/arch/mips/kernel/smtc-proc.c
+++ b/arch/mips/kernel/smtc-proc.c
@@ -11,7 +11,6 @@
 #include <asm/cpu.h>
 #include <asm/processor.h>
 #include <linux/atomic.h>
-#include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/mmu_context.h>
 #include <asm/mipsregs.h>
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 0a42ff3ff6a1..c4f75bbc0bd6 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -31,7 +31,6 @@
 #include <asm/cpu.h>
 #include <asm/processor.h>
 #include <linux/atomic.h>
-#include <asm/system.h>
 #include <asm/hardirq.h>
 #include <asm/hazards.h>
 #include <asm/irq.h>
diff --git a/arch/mips/kernel/spram.c b/arch/mips/kernel/spram.c
index 1821d12a6410..6af08d896e20 100644
--- a/arch/mips/kernel/spram.c
+++ b/arch/mips/kernel/spram.c
@@ -15,7 +15,6 @@
 
 #include <asm/fpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
 #include <asm/r4kcache.h>
 #include <asm/hazards.h>
 
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index d02765708ddb..b08220c82113 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -37,6 +37,7 @@
 #include <asm/shmparam.h>
 #include <asm/sysmips.h>
 #include <asm/uaccess.h>
+#include <asm/switch_to.h>
 
 /*
  * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index d79ae5437b58..cfdaaa4cffc0 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -45,7 +45,6 @@
 #include <asm/pgtable.h>
 #include <asm/ptrace.h>
 #include <asm/sections.h>
-#include <asm/system.h>
 #include <asm/tlbdebug.h>
 #include <asm/traps.h>
 #include <asm/uaccess.h>
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index aedb8941caa5..9c58bdf58f23 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -85,7 +85,6 @@
 #include <asm/cop2.h>
 #include <asm/inst.h>
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #define STR(x)  __STR(x)
 #define __STR(x)  #x
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index bfa12a4f97b9..f6f91523cb1c 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -49,7 +49,6 @@
 #include <asm/cpu.h>
 #include <asm/mips_mt.h>
 #include <asm/processor.h>
-#include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/kspd.h>