(corrected) swap modules

Please ignore the previous patch, the file drivers/scsi/sim710_d.h was 
accidentally patched. This is the correct one instead.

regards,
David Chow

David Chow wrote:

Dear linux-mm team,

This patch is for patching the mm and fs stuff to make the Linux 
2.4.21 swap code to allow a concept of modularized swap methods. This 
concept and swap code is originally from Justus Heine who created the 
NFS swap patch for 2.2 and 2.4 . I've extracted the code and modified 
to make it as a generic swap module code. The vanilla kernel swap code 
is been moved to a file fs/blkdev_swap.c which is for normal plain 
block device swaps. Users can configure the kernel to include the 
local block device swap code or compile it as a module. Developers can 
also develop their own swap methods instead of using the plain swap 
code (may be some crypto for security reasons) . I've been using this 
API to develop NFS swap and netswap code for a year an more. This 
patch has been tested for more than a year in a production environment 
on smp and non-smp (I think it is quite stable though). Please find it 
useful.

regards,
David Chow