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, 3 insertions, 23 deletions

diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 4d5e6d2..2eb12f1 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -26,7 +26,6 @@
 #include <linux/coredump.h>
 #include <linux/slab.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
 #include <asm/a.out-core.h>
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 504b6eee..7d7ff20 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -35,6 +35,7 @@
 #include <asm/uaccess.h>
 #include <asm/param.h>
 #include <asm/page.h>
+#include <asm/exec.h>
 
 static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
 static int load_elf_library(struct file *);
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index c64bf5e..9bd5612 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -39,6 +39,7 @@
 #include <asm/uaccess.h>
 #include <asm/param.h>
 #include <asm/pgalloc.h>
+#include <asm/exec.h>
 
 typedef char *elf_caddr_t;
 
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 5979027..024d20e 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -37,7 +37,6 @@
 #include <linux/syscalls.h>
 
 #include <asm/byteorder.h>
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/unaligned.h>
 #include <asm/cacheflush.h>
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 05156c1..2870597 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -21,7 +21,6 @@
 #include <linux/vfs.h>
 #include <linux/slab.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #include <linux/fs.h>
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 8f616e0..761d5b3 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -38,7 +38,6 @@
 #include <linux/mutex.h>
 #include <linux/device.h>
 #include <asm/io.h>
-#include <asm/system.h>
 #include <asm/poll.h>
 #include <asm/uaccess.h>
 
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 9727e0c..0c68fd3 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -14,7 +14,6 @@
  * improvements to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
  */
 
-#include <asm/system.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/types.h>
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 629e9ed..739b098 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -34,7 +34,6 @@
 #include <linux/mutex.h>
 #include <linux/anon_inodes.h>
 #include <asm/uaccess.h>
-#include <asm/system.h>
 #include <asm/io.h>
 #include <asm/mman.h>
 #include <linux/atomic.h>
diff --git a/fs/exec.c b/fs/exec.c
index 23559c2..c8b63d1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -59,6 +59,7 @@
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/tlb.h>
+#include <asm/exec.h>
 
 #include <trace/events/task.h>
 #include "internal.h"
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 17f557f..806525a 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -28,7 +28,6 @@
 #include <linux/blkdev.h>
 #include <linux/bitops.h>
 #include <trace/events/jbd2.h>
-#include <asm/system.h>
 
 /*
  * Default IO end handler for temporary BJ_IO buffer_heads.
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 98ed6db..1afb701 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -50,7 +50,6 @@
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
-#include <asm/system.h>
 
 EXPORT_SYMBOL(jbd2_journal_extend);
 EXPORT_SYMBOL(jbd2_journal_stop);
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index 64a3264..3ff5fcc 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -7,7 +7,6 @@
  */
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #include <linux/time.h>
 #include <linux/kernel.h>
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 49df0e7..87484fb 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -11,7 +11,6 @@
 
 #include <linux/module.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/byteorder.h>
 
diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c
index e5d71b2..be20a7e 100644
--- a/fs/ncpfs/mmap.c
+++ b/fs/ncpfs/mmap.c
@@ -19,7 +19,6 @@
 #include <linux/memcontrol.h>
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #include "ncp_fs.h"
 
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 4a108a0..da7b5e4 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -43,7 +43,6 @@
 #include <linux/nsproxy.h>
 #include <linux/pid_namespace.h>
 
-#include <asm/system.h>
 
 #include "nfs4_fs.h"
 #include "callback.h"
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 9c7f66a..481be7f 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -51,7 +51,6 @@
 #include <linux/nfs_page.h>
 #include <linux/sunrpc/clnt.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <linux/atomic.h>
 
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 4fdaaa6..aa9b709 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -30,7 +30,6 @@
 #include <linux/swap.h>
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #include "delegation.h"
 #include "internal.h"
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 801d6d8..4ca6f5c 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -32,7 +32,6 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #include "nfs4_fs.h"
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 7bb4d13..e8bbfa5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -41,7 +41,6 @@
 #include <linux/freezer.h>
 #include <linux/crc32.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #include "nfs4_fs.h"
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index cc1f758..9a0e8ef 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -20,7 +20,6 @@
 #include <linux/nfs_page.h>
 #include <linux/module.h>
 
-#include <asm/system.h>
 #include "pnfs.h"
 
 #include "nfs4_fs.h"
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ccc4cdb..37412f7 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -55,7 +55,6 @@
 #include <linux/nsproxy.h>
 #include <linux/rcupdate.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #include "nfs4_fs.h"
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 8461a7b..205c922 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -22,7 +22,6 @@
 #include <linux/slab.h>
 #include <linux/mount.h>
 
-#include <asm/system.h>
 #include <asm/uaccess.h>
 
 #include "internal.h"
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index cf9f4de..b1a0857 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -51,7 +51,6 @@
 #include <linux/uaccess.h>
 #include <linux/slab.h>
 
-#include <asm/system.h>
 
 /* gets a struct reiserfs_journal_list * from a list head */
 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 9094e1d..7cdd395 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -26,7 +26,6 @@
  */
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #include <linux/errno.h>
 #include <linux/fs.h>
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index f636f6b..ac8e279 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -73,7 +73,6 @@
 #include <stdarg.h>
 
 #include <asm/uaccess.h>
-#include <asm/system.h>
 
 #include <linux/errno.h>
 #include <linux/fs.h>
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index df7ffb0..5bf3be4 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -21,7 +21,6 @@
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>
-#include <asm/system.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>