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frv: update comment in scatterlist to reflect new setup

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Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-10-23 12:39:41 +02:00
parent 26da107848
commit d09d276ebf
1 changed files with 4 additions and 4 deletions
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8
include/asm-frv/scatterlist.h
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@ -4,19 +4,19 @@
#include <asm/types.h> #include <asm/types.h>
/* /*
* Drivers must set either ->address or (preferred) ->page and ->offset * Drivers must set either ->address or (preferred) page and ->offset
* to indicate where data must be transferred to/from. * to indicate where data must be transferred to/from.
* *
* Using ->page is recommended since it handles highmem data as well as * Using page is recommended since it handles highmem data as well as
* low mem. ->address is restricted to data which has a virtual mapping, and * low mem. ->address is restricted to data which has a virtual mapping, and
* it will go away in the future. Updating to ->page can be automated very * it will go away in the future. Updating to page can be automated very
* easily -- something like * easily -- something like
* *
* sg->address = some_ptr; * sg->address = some_ptr;
* *
* can be rewritten as * can be rewritten as
* *
* sg->page = virt_to_page(some_ptr); * sg_set_page(virt_to_page(some_ptr));
* sg->offset = (unsigned long) some_ptr & ~PAGE_MASK; * sg->offset = (unsigned long) some_ptr & ~PAGE_MASK;
* *
* and that's it. There's no excuse for not highmem enabling YOUR driver. /jens * and that's it. There's no excuse for not highmem enabling YOUR driver. /jens