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| author | Dan Williams <dan.j.williams@intel.com> | 2009-03-31 08:09:39 +0400 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-03-31 08:09:39 +0400 |
| commit | f701d589aa34d7531183c9ac6f7713ba14212b02 (patch) | |
| tree | d388cd7fa54c520f12233470a35ebb0676677e7a /drivers/md/raid6algos.c | |
| parent | 18b0033491f584a2d79697da714b1ef9d6b27d22 (diff) | |
| download | linux-f701d589aa34d7531183c9ac6f7713ba14212b02.tar.xz | |
md/raid6: move raid6 data processing to raid6_pq.ko
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>
Diffstat (limited to 'drivers/md/raid6algos.c')
| -rw-r--r-- | drivers/md/raid6algos.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/md/raid6algos.c b/drivers/md/raid6algos.c index 1f6a3c82ee0c..866215ac7f25 100644 --- a/drivers/md/raid6algos.c +++ b/drivers/md/raid6algos.c @@ -16,13 +16,20 @@ * Algorithm list and algorithm selection for RAID-6 */ -#include "raid6.h" +#include <linux/raid/pq.h> #ifndef __KERNEL__ #include <sys/mman.h> #include <stdio.h> +#else +#if !RAID6_USE_EMPTY_ZERO_PAGE +/* In .bss so it's zeroed */ +const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256))); +EXPORT_SYMBOL(raid6_empty_zero_page); +#endif #endif struct raid6_calls raid6_call; +EXPORT_SYMBOL_GPL(raid6_call); /* Various routine sets */ extern const struct raid6_calls raid6_intx1; @@ -79,6 +86,7 @@ const struct raid6_calls * const raid6_algos[] = { #else /* Need more time to be stable in userspace */ #define RAID6_TIME_JIFFIES_LG2 9 +#define time_before(x, y) ((x) < (y)) #endif /* Try to pick the best algorithm */ @@ -152,3 +160,12 @@ int __init raid6_select_algo(void) return best ? 0 : -EINVAL; } + +static void raid6_exit(void) +{ + do { } while (0); +} + +subsys_initcall(raid6_select_algo); +module_exit(raid6_exit); +MODULE_LICENSE("GPL"); |