4 files changed, 32 insertions, 23 deletions

diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index b324dcac1c56..45fdf4a51a2a 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -95,5 +95,11 @@ int main(void)
   DEFINE(SYS_ERROR0,		0x9f0000);
   BLANK();
   DEFINE(SIZEOF_MACHINE_DESC,	sizeof(struct machine_desc));
+  DEFINE(MACHINFO_TYPE,		offsetof(struct machine_desc, nr));
+  DEFINE(MACHINFO_NAME,		offsetof(struct machine_desc, name));
+  DEFINE(MACHINFO_PHYSIO,	offsetof(struct machine_desc, phys_io));
+  DEFINE(MACHINFO_PGOFFIO,	offsetof(struct machine_desc, io_pg_offst));
+  DEFINE(PROCINFO_INITFUNC,	offsetof(struct proc_info_list, __cpu_flush));
+  DEFINE(PROCINFO_MMUFLAGS,	offsetof(struct proc_info_list, __cpu_mmu_flags));
   return 0; 
 }
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 0bea65864051..adf62e5eaad7 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -20,12 +20,10 @@
 #include <asm/mach-types.h>
 #include <asm/procinfo.h>
 #include <asm/ptrace.h>
+#include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
 #include <asm/system.h>
 
-#define PROCINFO_INITFUNC       12
-#define MACHINFO_TYPE		0
-
 /*
  * Kernel startup entry point.
  * ---------------------------
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 04b66a9328ef..04f7344e356a 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -24,14 +24,6 @@
 #include <asm/thread_info.h>
 #include <asm/system.h>
 
-#define PROCINFO_MMUFLAGS	8
-#define PROCINFO_INITFUNC	12
-
-#define MACHINFO_TYPE		0
-#define MACHINFO_PHYSIO		4
-#define MACHINFO_PGOFFIO	8
-#define MACHINFO_NAME		12
-
 #define KERNEL_RAM_ADDR	(PAGE_OFFSET + TEXT_OFFSET)
 
 /*
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 1ff75cee4b0d..1a1539e3a946 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -264,8 +264,12 @@ void show_fpregs(struct user_fp *regs)
 /*
  * Task structure and kernel stack allocation.
  */
-static unsigned long *thread_info_head;
-static unsigned int nr_thread_info;
+struct thread_info_list {
+	unsigned long *head;
+	unsigned int nr;
+};
+
+static DEFINE_PER_CPU(struct thread_info_list, thread_info_list) = { NULL, 0 };
 
 #define EXTRA_TASK_STRUCT	4
 
@@ -274,12 +278,15 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
 	struct thread_info *thread = NULL;
 
 	if (EXTRA_TASK_STRUCT) {
-		unsigned long *p = thread_info_head;
+		struct thread_info_list *th = &get_cpu_var(thread_info_list);
+		unsigned long *p = th->head;
 
 		if (p) {
-			thread_info_head = (unsigned long *)p[0];
-			nr_thread_info -= 1;
+			th->head = (unsigned long *)p[0];
+			th->nr -= 1;
 		}
+		put_cpu_var(thread_info_list);
+
 		thread = (struct thread_info *)p;
 	}
 
@@ -300,13 +307,19 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
 
 void free_thread_info(struct thread_info *thread)
 {
-	if (EXTRA_TASK_STRUCT && nr_thread_info < EXTRA_TASK_STRUCT) {
-		unsigned long *p = (unsigned long *)thread;
-		p[0] = (unsigned long)thread_info_head;
-		thread_info_head = p;
-		nr_thread_info += 1;
-	} else
-		free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
+	if (EXTRA_TASK_STRUCT) {
+		struct thread_info_list *th = &get_cpu_var(thread_info_list);
+		if (th->nr < EXTRA_TASK_STRUCT) {
+			unsigned long *p = (unsigned long *)thread;
+			p[0] = th->head;
+			th->head = p;
+			th->nr += 1;
+			put_cpu_var(thread_info_list);
+			return;
+		}
+		put_cpu_var(thread_info_list);
+	}
+	free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
 }
 
 /*