md: Factor out RAID6 algorithms into lib/

We'll want to use these in btrfs too.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

17 files changed, 84 insertions, 81 deletions

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 2158377a1359..891f7c8490d3 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -121,7 +121,7 @@ config MD_RAID10
 config MD_RAID456
         tristate "RAID-4/RAID-5/RAID-6 mode"
         depends on BLK_DEV_MD
-        select MD_RAID6_PQ
+        select RAID6_PQ
         select ASYNC_MEMCPY
         select ASYNC_XOR
         select ASYNC_PQ
@@ -165,12 +165,9 @@ config MULTICORE_RAID456
 
           If unsure, say N.
 
-config MD_RAID6_PQ
-        tristate
-
 config ASYNC_RAID6_TEST
         tristate "Self test for hardware accelerated raid6 recovery"
-        depends on MD_RAID6_PQ
+        depends on RAID6_PQ
         select ASYNC_RAID6_RECOV
         ---help---
           This is a one-shot self test that permutes through the
diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 1dc4185bd781..c9b3a7843d83 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -12,13 +12,6 @@ dm-log-userspace-y \
                 += dm-log-userspace-base.o dm-log-userspace-transfer.o
 md-mod-y        += md.o bitmap.o
 raid456-y       += raid5.o
-raid6_pq-y      += raid6algos.o raid6recov.o raid6tables.o \
-                   raid6int1.o raid6int2.o raid6int4.o \
-                   raid6int8.o raid6int16.o raid6int32.o \
-                   raid6altivec1.o raid6altivec2.o raid6altivec4.o \
-                   raid6altivec8.o \
-                   raid6mmx.o raid6sse1.o raid6sse2.o
-hostprogs-y     += mktables
 
 # Note: link order is important.  All raid personalities
 # and must come before md.o, as they each initialise 
@@ -29,7 +22,6 @@ obj-$(CONFIG_MD_LINEAR)		+= linear.o
 obj-$(CONFIG_MD_RAID0)          += raid0.o
 obj-$(CONFIG_MD_RAID1)          += raid1.o
 obj-$(CONFIG_MD_RAID10)         += raid10.o
-obj-$(CONFIG_MD_RAID6_PQ)       += raid6_pq.o
 obj-$(CONFIG_MD_RAID456)        += raid456.o
 obj-$(CONFIG_MD_MULTIPATH)      += multipath.o
 obj-$(CONFIG_MD_FAULTY)         += faulty.o
@@ -45,75 +37,7 @@ obj-$(CONFIG_DM_MIRROR)		+= dm-mirror.o dm-log.o dm-region-hash.o
 obj-$(CONFIG_DM_LOG_USERSPACE)  += dm-log-userspace.o
 obj-$(CONFIG_DM_ZERO)           += dm-zero.o
 
-quiet_cmd_unroll = UNROLL  $@
-      cmd_unroll = $(PERL) $(srctree)/$(src)/unroll.pl $(UNROLL) \
-                   < $< > $@ || ( rm -f $@ && exit 1 )
-
-ifeq ($(CONFIG_ALTIVEC),y)
-altivec_flags := -maltivec -mabi=altivec
-endif
-
 ifeq ($(CONFIG_DM_UEVENT),y)
 dm-mod-objs                     += dm-uevent.o
 endif
 
-targets += raid6int1.c
-$(obj)/raid6int1.c:   UNROLL := 1
-$(obj)/raid6int1.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-targets += raid6int2.c
-$(obj)/raid6int2.c:   UNROLL := 2
-$(obj)/raid6int2.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-targets += raid6int4.c
-$(obj)/raid6int4.c:   UNROLL := 4
-$(obj)/raid6int4.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-targets += raid6int8.c
-$(obj)/raid6int8.c:   UNROLL := 8
-$(obj)/raid6int8.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-targets += raid6int16.c
-$(obj)/raid6int16.c:  UNROLL := 16
-$(obj)/raid6int16.c:  $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-targets += raid6int32.c
-$(obj)/raid6int32.c:  UNROLL := 32
-$(obj)/raid6int32.c:  $(src)/raid6int.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-CFLAGS_raid6altivec1.o += $(altivec_flags)
-targets += raid6altivec1.c
-$(obj)/raid6altivec1.c:   UNROLL := 1
-$(obj)/raid6altivec1.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-CFLAGS_raid6altivec2.o += $(altivec_flags)
-targets += raid6altivec2.c
-$(obj)/raid6altivec2.c:   UNROLL := 2
-$(obj)/raid6altivec2.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-CFLAGS_raid6altivec4.o += $(altivec_flags)
-targets += raid6altivec4.c
-$(obj)/raid6altivec4.c:   UNROLL := 4
-$(obj)/raid6altivec4.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-CFLAGS_raid6altivec8.o += $(altivec_flags)
-targets += raid6altivec8.c
-$(obj)/raid6altivec8.c:   UNROLL := 8
-$(obj)/raid6altivec8.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
-        $(call if_changed,unroll)
-
-quiet_cmd_mktable = TABLE   $@
-      cmd_mktable = $(obj)/mktables > $@ || ( rm -f $@ && exit 1 )
-
-targets += raid6tables.c
-$(obj)/raid6tables.c: $(obj)/mktables FORCE
-        $(call if_changed,mktable)
diff --git a/lib/Kconfig b/lib/Kconfig
index bb1326d3839c..1cc756c4c78c 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -7,6 +7,9 @@ config BINARY_PRINTF
 
 menu "Library routines"
 
+config RAID6_PQ
+        tristate
+
 config BITREVERSE
         tristate
 
diff --git a/lib/Makefile b/lib/Makefile
index 2e78277eff9d..b25faf0d1d5c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
 obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
 obj-$(CONFIG_LZO_COMPRESS) += lzo/
 obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
+obj-$(CONFIG_RAID6_PQ) += raid6/
 
 lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
 lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile
new file mode 100644
index 000000000000..b2fe4baa90e0
--- /dev/null
+++ b/lib/raid6/Makefile
@@ -0,0 +1,78 @@
+obj-$(CONFIG_RAID6_PQ)  += raid6_pq.o
+
+raid6_pq-y      += raid6algos.o raid6recov.o raid6tables.o \
+                   raid6int1.o raid6int2.o raid6int4.o \
+                   raid6int8.o raid6int16.o raid6int32.o \
+                   raid6altivec1.o raid6altivec2.o raid6altivec4.o \
+                   raid6altivec8.o \
+                   raid6mmx.o raid6sse1.o raid6sse2.o
+hostprogs-y     += mktables
+
+quiet_cmd_unroll = UNROLL  $@
+      cmd_unroll = $(PERL) $(srctree)/$(src)/unroll.pl $(UNROLL) \
+                   < $< > $@ || ( rm -f $@ && exit 1 )
+
+ifeq ($(CONFIG_ALTIVEC),y)
+altivec_flags := -maltivec -mabi=altivec
+endif
+
+targets += raid6int1.c
+$(obj)/raid6int1.c:   UNROLL := 1
+$(obj)/raid6int1.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+targets += raid6int2.c
+$(obj)/raid6int2.c:   UNROLL := 2
+$(obj)/raid6int2.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+targets += raid6int4.c
+$(obj)/raid6int4.c:   UNROLL := 4
+$(obj)/raid6int4.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+targets += raid6int8.c
+$(obj)/raid6int8.c:   UNROLL := 8
+$(obj)/raid6int8.c:   $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+targets += raid6int16.c
+$(obj)/raid6int16.c:  UNROLL := 16
+$(obj)/raid6int16.c:  $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+targets += raid6int32.c
+$(obj)/raid6int32.c:  UNROLL := 32
+$(obj)/raid6int32.c:  $(src)/raid6int.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+CFLAGS_raid6altivec1.o += $(altivec_flags)
+targets += raid6altivec1.c
+$(obj)/raid6altivec1.c:   UNROLL := 1
+$(obj)/raid6altivec1.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+CFLAGS_raid6altivec2.o += $(altivec_flags)
+targets += raid6altivec2.c
+$(obj)/raid6altivec2.c:   UNROLL := 2
+$(obj)/raid6altivec2.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+CFLAGS_raid6altivec4.o += $(altivec_flags)
+targets += raid6altivec4.c
+$(obj)/raid6altivec4.c:   UNROLL := 4
+$(obj)/raid6altivec4.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+CFLAGS_raid6altivec8.o += $(altivec_flags)
+targets += raid6altivec8.c
+$(obj)/raid6altivec8.c:   UNROLL := 8
+$(obj)/raid6altivec8.c:   $(src)/raid6altivec.uc $(src)/unroll.pl FORCE
+        $(call if_changed,unroll)
+
+quiet_cmd_mktable = TABLE   $@
+      cmd_mktable = $(obj)/mktables > $@ || ( rm -f $@ && exit 1 )
+
+targets += raid6tables.c
+$(obj)/raid6tables.c: $(obj)/mktables FORCE
+        $(call if_changed,mktable)
diff --git a/drivers/md/mktables.c b/lib/raid6/mktables.c
index 3b1500843bba..3b1500843bba 100644
--- a/drivers/md/mktables.c
+++ b/lib/raid6/mktables.c
diff --git a/drivers/md/raid6algos.c b/lib/raid6/raid6algos.c
index 866215ac7f25..866215ac7f25 100644
--- a/drivers/md/raid6algos.c
+++ b/lib/raid6/raid6algos.c
diff --git a/drivers/md/raid6altivec.uc b/lib/raid6/raid6altivec.uc
index 699dfeee4944..699dfeee4944 100644
--- a/drivers/md/raid6altivec.uc
+++ b/lib/raid6/raid6altivec.uc
diff --git a/drivers/md/raid6int.uc b/lib/raid6/raid6int.uc
index f9bf9cba357f..f9bf9cba357f 100644
--- a/drivers/md/raid6int.uc
+++ b/lib/raid6/raid6int.uc
diff --git a/drivers/md/raid6mmx.c b/lib/raid6/raid6mmx.c
index e7f6c13132bf..e7f6c13132bf 100644
--- a/drivers/md/raid6mmx.c
+++ b/lib/raid6/raid6mmx.c
diff --git a/drivers/md/raid6recov.c b/lib/raid6/raid6recov.c
index 2609f00e0d61..2609f00e0d61 100644
--- a/drivers/md/raid6recov.c
+++ b/lib/raid6/raid6recov.c
diff --git a/drivers/md/raid6sse1.c b/lib/raid6/raid6sse1.c
index b274dd5eab8f..b274dd5eab8f 100644
--- a/drivers/md/raid6sse1.c
+++ b/lib/raid6/raid6sse1.c
diff --git a/drivers/md/raid6sse2.c b/lib/raid6/raid6sse2.c
index 6ed6c6c0389f..6ed6c6c0389f 100644
--- a/drivers/md/raid6sse2.c
+++ b/lib/raid6/raid6sse2.c
diff --git a/drivers/md/raid6test/Makefile b/lib/raid6/raid6test/Makefile
index 58ffdf4f5161..58ffdf4f5161 100644
--- a/drivers/md/raid6test/Makefile
+++ b/lib/raid6/raid6test/Makefile
diff --git a/drivers/md/raid6test/test.c b/lib/raid6/raid6test/test.c
index 7a930318b17d..7a930318b17d 100644
--- a/drivers/md/raid6test/test.c
+++ b/lib/raid6/raid6test/test.c
diff --git a/drivers/md/raid6x86.h b/lib/raid6/raid6x86.h
index 4c22c1568558..4c22c1568558 100644
--- a/drivers/md/raid6x86.h
+++ b/lib/raid6/raid6x86.h
diff --git a/drivers/md/unroll.pl b/lib/raid6/unroll.pl
index 3acc710a20ea..3acc710a20ea 100644
--- a/drivers/md/unroll.pl
+++ b/lib/raid6/unroll.pl