d6dd61c831
Add hooks to allow a paravirt implementation to track the lifetime of an mm. Paravirtualization requires three hooks, but only two are needed in common code. They are: arch_dup_mmap, which is called when a new mmap is created at fork arch_exit_mmap, which is called when the last process reference to an mm is dropped, which typically happens on exit and exec. The third hook is activate_mm, which is called from the arch-specific activate_mm() macro/function, and so doesn't need stub versions for other architectures. It's called when an mm is first used. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: linux-arch@vger.kernel.org Cc: James Bottomley <James.Bottomley@SteelEye.com> Acked-by: Ingo Molnar <mingo@elte.hu>
34 lines
708 B
C
34 lines
708 B
C
#ifndef __M68KNOMMU_MMU_CONTEXT_H
|
|
#define __M68KNOMMU_MMU_CONTEXT_H
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm-generic/mm_hooks.h>
|
|
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
|
|
{
|
|
}
|
|
|
|
static inline int
|
|
init_new_context(struct task_struct *tsk, struct mm_struct *mm)
|
|
{
|
|
// mm->context = virt_to_phys(mm->pgd);
|
|
return(0);
|
|
}
|
|
|
|
#define destroy_context(mm) do { } while(0)
|
|
|
|
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
|
|
{
|
|
}
|
|
|
|
#define deactivate_mm(tsk,mm) do { } while (0)
|
|
|
|
static inline void activate_mm(struct mm_struct *prev_mm,
|
|
struct mm_struct *next_mm)
|
|
{
|
|
}
|
|
|
|
#endif
|