/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#ifndef __UM_MMU_CONTEXT_H
#define __UM_MMU_CONTEXT_H
-#include <asm-generic/mm_hooks.h>
-
#include "linux/sched.h"
#include "um_mmu.h"
+extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
+extern void arch_exit_mmap(struct mm_struct *mm);
+
#define get_mmu_context(task) do ; while(0)
#define activate_context(tsk) do ; while(0)
static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
{
/*
- * This is called by fs/exec.c and fs/aio.c. In the first case, for an
- * exec, we don't need to do anything as we're called from userspace
- * and thus going to use a new host PID. In the second, we're called
- * from a kernel thread, and thus need to go doing the mmap's on the
- * host. Since they're very expensive, we want to avoid that as far as
- * possible.
+ * This is called by fs/exec.c and sys_unshare()
+ * when the new ->mm is used for the first time.
*/
- if (old != new && (current->flags & PF_BORROWED_MM))
- __switch_mm(&new->context.skas.id);
+ __switch_mm(&new->context.id);
+ arch_dup_mmap(old, new);
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
cpu_clear(cpu, prev->cpu_vm_mask);
cpu_set(cpu, next->cpu_vm_mask);
if(next != &init_mm)
- __switch_mm(&next->context.skas.id);
+ __switch_mm(&next->context.id);
}
}
extern void destroy_context(struct mm_struct *mm);
#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */