Re: [PATCH -mm] Revoke core code: fix nommu arch compiling errorbug

[Pekka J Enberg]

On Mon, 26 Mar 2007, Wu, Bryan wrote:
> As struct mm_struct vm_mm is hidden in struct vm_area_struct in NOMMU
> arch, this is a fixing method when compiling failure on blackfin arch.

What compile error is that? I don't see any #ifdef around ->vm_mm for 
struct vm_area_struct in <linux/mm.h>.

On Mon, 26 Mar 2007, Wu, Bryan wrote:
> +	if (!mm)
> +		return -ENOENT;
> +
>  	details.i_mmap_lock = &mapping->i_mmap_lock;

This means you won't be able to revoke memory mapped files with no-MMU. 
I'd rather fix it properly if someone can give me a clue how mmap works on 
non-MMU.

			Pekka
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