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md/raid6: move raid6 data processing to raid6_pq.ko

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Move the raid6 data processing routines into a standalone module
(raid6_pq) to prepare them to be called from async_tx wrappers and other
non-md drivers/modules.  This precludes a circular dependency of raid456
needing the async modules for data processing while those modules in
turn depend on raid456 for the base level synchronous raid6 routines.

To support this move:
1/ The exportable definitions in raid6.h move to include/linux/raid/pq.h
2/ The raid6_call, recovery calls, and table symbols are exported
3/ Extra #ifdef __KERNEL__ statements to enable the userspace raid6test to
   compile

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Dan Williams
2009-03-31 15:09:39 +11:00
committed by NeilBrown
parent 18b0033491
commit f701d589aa
15 changed files with 66 additions and 34 deletions
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2
drivers/md/raid6test/test.c
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@@ -17,7 +17,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "raid6.h"
#include <linux/raid/pq.h>
#define NDISKS 16 /* Including P and Q */