[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070928044111.GB24458@kroah.com>
Date: Thu, 27 Sep 2007 21:41:11 -0700
From: Greg KH <greg@...ah.com>
To: Denys Vlasenko <vda.linux@...glemail.com>
Cc: tapio.laxstrom@...ime.fi, linux-kernel@...r.kernel.org
Subject: Re: drivers/usb/misc/emi*.c have the biggest data objects in the
whole tree
On Fri, Sep 14, 2007 at 11:35:34AM +0100, Denys Vlasenko wrote:
> Hi Tapio,
>
> You are the author of these files. Are you still maintaining them?
> If not, do you know who is the current maintainer?
>
> These two object files hold the biggest data objects in the whole Linux kernel
> after lockdep:
>
> text data bss dec hex filename
> 1258 160516 0 161774 277ee ./drivers/usb/misc/emi26.o
> 1504 209296 0 210800 33770 ./drivers/usb/misc/emi62.o
>
> Basically, these are big arrays of the following structures:
>
> typedef struct _INTEL_HEX_RECORD
> {
> __u32 length;
> __u32 address;
> __u32 type;
> __u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
> } INTEL_HEX_RECORD;
>
> I suggest the following optimizations:
>
> Change structure to
>
> typedef struct _INTEL_HEX_RECORD
> {
> __u8 type;
> __u8 length;
> __u16 address;
> __u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
> } INTEL_HEX_RECORD __attribute__((__packed__));
Only if you redo the whole firmware image too :)
What is this really hurting? It's only relevant if you load the
specific module, if you have this device type. It's a firmware blob,
nothing really interesting at all.
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists