[PATCH 33/35] Disintegrate asm/system.h on all arches [ver #2]

[David Howells]

asm/system.h is a cause of circular dependency problems because it contains
commonly used primitive stuff like barrier definitions and uncommonly used
stuff like switch_to() that might require MMU definitions.

Disintegrate asm/system.h on all arches into the following common segments:

 (1) asm/barrier.h

     Memory barrier stuff - already done for MIPS and Alpha.

 (2) asm/atomic.h

     Move xchg() and cmpxchg() here as they're atomic ops.

 (3) asm/bug.h

     Move die() and similar here.

 (4) asm/arch_hooks.h

     Move common arch hooks here (such as default_idle()).

 (5) asm/elf.h

     Move AT_VECTOR_SIZE_ARCH here.

 (6) asm/switch_to.h

     Move switch_to() here.

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

 drivers/misc/sgi-gru/gru_instructions.h |    1 +
 fs/binfmt_elf.c                         |    1 +
 fs/binfmt_elf_fdpic.c                   |    1 +
 fs/exec.c                               |    1 +
 include/asm-generic/bitops/atomic.h     |    2 +-
 include/linux/llist.h                   |    3 +--
 include/linux/spinlock.h                |    1 +
 kernel/sched/core.c                     |    1 +
 8 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h
index d95587c..04d5170 100644
--- a/drivers/misc/sgi-gru/gru_instructions.h
+++ b/drivers/misc/sgi-gru/gru_instructions.h
@@ -40,6 +40,7 @@ extern void gru_wait_abort_proc(void *cb);
 			*((volatile unsigned long *)(p)) = v; /* force st.rel */	\
 		} while (0)
 #elif defined(CONFIG_X86_64)
+#include <asm/cacheflush.h>
 #define __flush_cache(p)		clflush(p)
 #define gru_ordered_store_ulong(p, v)					\
 		do {							\
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 07d096c..d104261 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 30745f4..c7f277a 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/exec.c b/fs/exec.c
index 153dee1..0ce48b3 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/include/asm-generic/bitops/atomic.h b/include/asm-generic/bitops/atomic.h
index ecc44a8..9ae6c34 100644
--- a/include/asm-generic/bitops/atomic.h
+++ b/include/asm-generic/bitops/atomic.h
@@ -2,7 +2,7 @@
 #define _ASM_GENERIC_BITOPS_ATOMIC_H_
 
 #include <asm/types.h>
-#include <asm/system.h>
+#include <linux/irqflags.h>
 
 #ifdef CONFIG_SMP
 #include <asm/spinlock.h>
diff --git a/include/linux/llist.h b/include/linux/llist.h
index 801b44b..a5199f6 100644
--- a/include/linux/llist.h
+++ b/include/linux/llist.h
@@ -56,8 +56,7 @@
  */
 
 #include <linux/kernel.h>
-#include <asm/system.h>
-#include <asm/processor.h>
+#include <asm/cmpxchg.h>
 
 struct llist_head {
 	struct llist_node *first;
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 7df6c17..fa0f93e 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -55,6 +55,7 @@
 #include <linux/kernel.h>
 #include <linux/stringify.h>
 #include <linux/bottom_half.h>
+#include <asm/barrier.h>
 
 #include <asm/system.h>
 
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b342f57..fff13cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -72,6 +72,7 @@
 #include <linux/slab.h>
 #include <linux/init_task.h>
 
+#include <asm/switch_to.h>
 #include <asm/tlb.h>
 #include <asm/irq_regs.h>
 #include <asm/mutex.h>

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