Re: [PATCH] VM routine fixes

[Andrew Morton <akpm@osdl.org>]

dhowells@redhat.com wrote:
>
> The attached patch fixes a number of problems in the VM routines:
> 
>  (1) Some inline funcs don't compile if CONFIG_MMU is not set.
> 
>  (2) swapper_pml4 needn't exist if CONFIG_MMU is not set.
> 
>  (3) __free_pages_ok() doesn't counter set_page_refs() different behaviour if
>      CONFIG_MMU is not set.
> 
>  (4) swsusp.c invokes TLB flushing functions without including the header file
>      that declares them.
> 

I spy a secret, uncommented, unchangelogged hunk:

> @@ -112,7 +112,9 @@ int shmem_zero_setup(struct vm_area_stru
>  	if (vma->vm_file)
>  		fput(vma->vm_file);
>  	vma->vm_file = file;
> +#ifdef CONFIG_MMU
>  	vma->vm_ops = &generic_file_vm_ops;
> +#endif
>  	return 0;
>  }
>  

What's happening there?