diff options
author | Jens Axboe <jens.axboe@oracle.com> | 2007-10-22 19:57:20 +0200 |
---|---|---|
committer | Jens Axboe <jens.axboe@oracle.com> | 2007-10-22 21:20:01 +0200 |
commit | 18dabf473e15850c0dbc8ff13ac1e2806d542c15 (patch) | |
tree | f6ce2fd3c7e3f9c2c7b4fbd9946199572bd9f622 /include/asm-frv | |
parent | 58b053e4ce9d2fc3023645c1b96e537c72aa8d9a (diff) | |
download | kernel_goldelico_gta04-18dabf473e15850c0dbc8ff13ac1e2806d542c15.zip kernel_goldelico_gta04-18dabf473e15850c0dbc8ff13ac1e2806d542c15.tar.gz kernel_goldelico_gta04-18dabf473e15850c0dbc8ff13ac1e2806d542c15.tar.bz2 |
Change table chaining layout
Change the page member of the scatterlist structure to be an unsigned
long, and encode more stuff in the lower bits:
- Bits 0 and 1 zero: this is a normal sg entry. Next sg entry is located
at sg + 1.
- Bit 0 set: this is a chain entry, the next real entry is at ->page_link
with the two low bits masked off.
- Bit 1 set: this is the final entry in the sg entry. sg_next() will return
NULL when passed such an entry.
It's thus important that sg table users use the proper accessors to get
and set the page member.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/asm-frv')
-rw-r--r-- | include/asm-frv/scatterlist.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-frv/scatterlist.h b/include/asm-frv/scatterlist.h index 8e827fa..53dade7 100644 --- a/include/asm-frv/scatterlist.h +++ b/include/asm-frv/scatterlist.h @@ -22,7 +22,7 @@ * and that's it. There's no excuse for not highmem enabling YOUR driver. /jens */ struct scatterlist { - struct page *page; /* Location for highmem page, if any */ + unsigned long page_link; unsigned int offset; /* for highmem, page offset */ dma_addr_t dma_address; |