Adding a function pointer to mtd_info struct

Adding a function pointer to mtd_info struct

[Justin Treon]

I am trying to add some new features in my kernel to cfi_cmd_0001.c for a test chip.
 I added a new field to the mtd_info struct in mtd.h and inserted the function
pointer into the mtd->overwrite field I added in cfi_cmd_0001.c, but when I try to
use mtd->overwrite in mtdblock.c the pointer is set to NULL.  

In the mtd_info struct in include/mtd/mtd.h I addded:
	int (*overwrite) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
const u_char *buf);

In cfi_cmd_0001.c I added:
	mtd->overwrite = cfi_intelext_overwrite_buffers;

What file or field do I need to modify to make new function accessible from
mtdblock.c?

Justin Treon



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Re: Adding a function pointer to mtd_info struct

[Josh Boyer]

On Wed, 23 Jan 2008 09:28:13 -0800 (PST)
Justin Treon <justin_treon@yahoo.com> wrote:

> I am trying to add some new features in my kernel to cfi_cmd_0001.c for a test chip.
>  I added a new field to the mtd_info struct in mtd.h and inserted the function
> pointer into the mtd->overwrite field I added in cfi_cmd_0001.c, but when I try to
> use mtd->overwrite in mtdblock.c the pointer is set to NULL.  
> 
> In the mtd_info struct in include/mtd/mtd.h I addded:
> 	int (*overwrite) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
> const u_char *buf);
> 
> In cfi_cmd_0001.c I added:
> 	mtd->overwrite = cfi_intelext_overwrite_buffers;
> 
> What file or field do I need to modify to make new function accessible from
> mtdblock.c?

Just post a patch of what you did.  It'll be easier to help you.

josh

Re: Adding a function pointer to mtd_info struct

[Justin Treon]

> > I am trying to add some new features in my kernel to cfi_cmd_0001.c for a test
> chip.
> >  I added a new field to the mtd_info struct in mtd.h and inserted the function
> > pointer into the mtd->overwrite field I added in cfi_cmd_0001.c, but when I try
> to
> > use mtd->overwrite in mtdblock.c the pointer is set to NULL.  
> > 
> > In the mtd_info struct in include/mtd/mtd.h I addded:
> > 	int (*overwrite) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
> > const u_char *buf);
> > 
> > In cfi_cmd_0001.c I added:
> > 	mtd->overwrite = cfi_intelext_overwrite_buffers;
> > 
> > What file or field do I need to modify to make new function accessible from
> > mtdblock.c?
> 
> Just post a patch of what you did.  It'll be easier to help you.
> 

I figured it out.  I did not realize I had to edit the mtd-parts file as well. Thank
you Josh.

Justin



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