On Thu, Jun 07, 2007 at 05:31:35PM +0800, Zhang Rui wrote:
> From: Zhang Rui <[email protected]>
>
> Well, first of all, I don't want to change so many files either.
>
> What I do:
> Adding a new parameter "struct bin_attribute *" in the
> .read/.write methods for the sysfs binary attributes.
>
> In fact, only the four lines change in fs/sysfs/bin.c and
> include/linux/sysfs.h do the real work.
> But I have to update all the files that use binary attributes
> to make them compatible with the new .read and .write methods.
> I'm not sure if I missed any. :(
>
> Why I do this:
> For a sysfs attribute, we can get a pointer pointing to the
> struct attribute in the .show/.store method,
> while we can't do this for the binary attributes.
> I don't know why this is different, but this does make it not
> so handy to use the binary attributes as the regular ones.
> So I think this patch is reasonable. :)
>
> Who benefits from it:
> The patch that exposes ACPI tables in sysfs
> requires such an improvement.
> All the table binary attributes share the same .read method.
> Parameter "struct bin_attribute *" is used to get
> the table signature and instance number which are used to
> distinguish different ACPI table binary attributes.
>
> Without this parameter, we need to offer different .read methods
> for different ACPI table binary attributes.
> This is impossible as there are various ACPI tables on different
> platforms, and we don't know what they are until they are loaded.
I have no objection to this patch but it failes the checkpatch.pl script
pretty badly with too long of lines. Care to fix it up and resend it?
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]