include/asm-generic/mm_hooks.h

/*
 * Define generic no-op hooks for arch_dup_mmap and arch_exit_mmap, to
 * be included in asm-FOO/mmu_context.h for any arch FOO which doesn't
 * need to hook these.
 */
#ifndef _ASM_GENERIC_MM_HOOKS_H
#define _ASM_GENERIC_MM_HOOKS_H

static inline void arch_dup_mmap(struct mm_struct *oldmm,
				 struct mm_struct *mm)
{
}

static inline void arch_exit_mmap(struct mm_struct *mm)
{
}

#endif	/* _ASM_GENERIC_MM_HOOKS_H */
[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction 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> 2007-05-02 19:27:14 +02:00			`/*`
			`* Define generic no-op hooks for arch_dup_mmap and arch_exit_mmap, to`
			`* be included in asm-FOO/mmu_context.h for any arch FOO which doesn't`
			`* need to hook these.`
			`*/`
			`#ifndef _ASM_GENERIC_MM_HOOKS_H`
			`#define _ASM_GENERIC_MM_HOOKS_H`

			`static inline void arch_dup_mmap(struct mm_struct *oldmm,`
			`struct mm_struct *mm)`
			`{`
			`}`

			`static inline void arch_exit_mmap(struct mm_struct *mm)`
			`{`
			`}`

			`#endif /* _ASM_GENERIC_MM_HOOKS_H */`