lkml.org 
[lkml]   [2007]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: drivers/usb/misc/emi*.c have the biggest data objects in the whole tree
Date
On Friday 28 September 2007 05:41, Greg KH wrote:
> 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 :)

I did. It wasn't hard.

> What is this really hurting? It's only relevant if you load the
> specific module

By this logic, no space wastage in modules is worth fixing.
--
vda
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-09-28 13:37    [from the cache]
©2003-2011 Jasper Spaans