lkml.org 
[lkml]   [2018]   [Dec]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v8 24/25] powerpc: Adopt nvram module for PPC64
On Wed, Dec 26, 2018 at 1:43 AM Finn Thain <fthain@telegraphics.com.au> wrote:

> +static ssize_t ppc_nvram_get_size(void)
> +{
> + if (ppc_md.nvram_size)
> + return ppc_md.nvram_size();
> + return -ENODEV;
> +}

> +const struct nvram_ops arch_nvram_ops = {
> + .read = ppc_nvram_read,
> + .write = ppc_nvram_write,
> + .get_size = ppc_nvram_get_size,
> + .sync = ppc_nvram_sync,
> +};

Coming back to this after my comment on the m68k side, I notice that
there is now a double indirection through function pointers. Have you
considered completely removing the operations from ppc_md instead
by having multiple copies of nvram_ops?

With the current method, it does seem odd to have a single
per-architecture instance of the exported structure containing
function pointers. This doesn't give us the flexibility of having
multiple copies in the kernel the way that ppc_md does, but it adds
overhead compared to simply exporting the functions directly.

Arnd

\
 
 \ /
  Last update: 2018-12-29 23:38    [W:0.339 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site