On Sun, 2007-12-09 at 19:52 +0100, Berkhan, Enrik (GE Infra, Oil & Gas)
wrote:
> - generic_file_mmap returns -ENOSYS for NOMMU systems; replicate this
> behaviour
>
> Signed-off-by: Enrik Berkhan <[email protected]>
> ---
> fs/nfs/file.c | 4 ++++
> 1 files changed, 4 insertions(+)
>
> Index: fs/nfs/file.c
> ===================================================================
> --- fs/nfs/file.c.orig 2007-12-05 09:48:59.000000000 +0100
> +++ fs/nfs/file.c 2007-12-05 09:49:56.000000000 +0100
> @@ -283,7 +283,11 @@ nfs_file_mmap(struct file * file, struct
> if (!status) {
> vma->vm_ops = &nfs_file_vm_ops;
> vma->vm_flags |= VM_CAN_NONLINEAR;
> +#ifdef CONFIG_MMU
> file_accessed(file);
> +#else
> + return -ENOSYS;
> +#endif
> }
> return status;
> }
Why do that after going through the process of revalidating the inode
etc.? Just replace nfs_file_mmap() with a function returning ENOSYS in
the case of CONFIG_MMU.
Better still, in the case of CONFIG_MMU, instead of having an
nfs_file_mmap(), just replace the .mmap field in nfs_file_operations
with a call to generic_file_mmap().
Trond
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