8 files changed, 38 insertions, 23 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 4ca0ab3448d..b749a1a46e2 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1,4 +1,10 @@
 #
+# Generic algorithms support
+#
+config XOR_BLOCKS
+        tristate
+
+#
 # Cryptographic API Configuration
 #
 
diff --git a/crypto/Makefile b/crypto/Makefile
index cce46a1c9dc..68e934b4bee 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -50,3 +50,9 @@ obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
 obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
 
 obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
+
+#
+# generic algorithms and the async_tx api
+#
+obj-$(CONFIG_XOR_BLOCKS) += xor.o
+
diff --git a/drivers/md/xor.c b/crypto/xor.c
index 324897c4be4..8281ac5e68a 100644
--- a/drivers/md/xor.c
+++ b/crypto/xor.c
@@ -26,7 +26,7 @@
 static struct xor_block_template *active_template;
 
 void
-xor_block(unsigned int count, unsigned int bytes, void **ptr)
+xor_blocks(unsigned int count, unsigned int bytes, void **ptr)
 {
         unsigned long *p0, *p1, *p2, *p3, *p4;
 
@@ -52,6 +52,7 @@ xor_block(unsigned int count, unsigned int bytes, void **ptr)
         p4 = (unsigned long *) ptr[4];
         active_template->do_5(bytes, p0, p1, p2, p3, p4);
 }
+EXPORT_SYMBOL(xor_blocks);
 
 /* Set of all registered templates.  */
 static struct xor_block_template *template_list;
@@ -78,7 +79,7 @@ do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
                 now = jiffies;
                 count = 0;
                 while (jiffies == now) {
-                        mb();
+                        mb(); /* prevent loop optimzation */
                         tmpl->do_2(BENCH_SIZE, b1, b2);
                         mb();
                         count++;
@@ -91,26 +92,26 @@ do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
         speed = max * (HZ * BENCH_SIZE / 1024);
         tmpl->speed = speed;
 
-        printk("   %-10s: %5d.%03d MB/sec\n", tmpl->name,
+        printk(KERN_INFO "   %-10s: %5d.%03d MB/sec\n", tmpl->name,
                speed / 1000, speed % 1000);
 }
 
-static int
-calibrate_xor_block(void)
+static int __init
+calibrate_xor_blocks(void)
 {
         void *b1, *b2;
         struct xor_block_template *f, *fastest;
 
         b1 = (void *) __get_free_pages(GFP_KERNEL, 2);
-        if (! b1) {
-                printk("raid5: Yikes!  No memory available.\n");
+        if (!b1) {
+                printk(KERN_WARNING "xor: Yikes!  No memory available.\n");
                 return -ENOMEM;
         }
         b2 = b1 + 2*PAGE_SIZE + BENCH_SIZE;
 
         /*
-         * If this arch/cpu has a short-circuited selection, don't loop through all
-         * the possible functions, just test the best one
+         * If this arch/cpu has a short-circuited selection, don't loop through
+         * all the possible functions, just test the best one
          */
 
         fastest = NULL;
@@ -122,11 +123,12 @@ calibrate_xor_block(void)
 #define xor_speed(templ)        do_xor_speed((templ), b1, b2)
 
         if (fastest) {
-                printk(KERN_INFO "raid5: automatically using best checksumming function: %s\n",
+                printk(KERN_INFO "xor: automatically using best "
+                        "checksumming function: %s\n",
                         fastest->name);
                 xor_speed(fastest);
         } else {
-                printk(KERN_INFO "raid5: measuring checksumming speed\n");
+                printk(KERN_INFO "xor: measuring checksumming speed\n");
                 XOR_TRY_TEMPLATES;
                 fastest = template_list;
                 for (f = fastest; f; f = f->next)
@@ -134,7 +136,7 @@ calibrate_xor_block(void)
                                 fastest = f;
         }
 
-        printk("raid5: using function: %s (%d.%03d MB/sec)\n",
+        printk(KERN_INFO "xor: using function: %s (%d.%03d MB/sec)\n",
                fastest->name, fastest->speed / 1000, fastest->speed % 1000);
 
 #undef xor_speed
@@ -147,8 +149,8 @@ calibrate_xor_block(void)
 
 static __exit void xor_exit(void) { }
 
-EXPORT_SYMBOL(xor_block);
 MODULE_LICENSE("GPL");
 
-module_init(calibrate_xor_block);
+/* when built-in xor.o must initialize before drivers/md/md.o */
+core_initcall(calibrate_xor_blocks);
 module_exit(xor_exit);
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 7df934d6913..24d93d02a1f 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -109,6 +109,7 @@ config MD_RAID10
 config MD_RAID456
         tristate "RAID-4/RAID-5/RAID-6 mode"
         depends on BLK_DEV_MD
+        select XOR_BLOCKS
         ---help---
           A RAID-5 set of N drives with a capacity of C MB per drive provides
           the capacity of C * (N - 1) MB, and protects against a failure
diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 38754084eac..71eb45f7417 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -17,7 +17,7 @@ raid456-objs	:= raid5.o raid6algos.o raid6recov.o raid6tables.o \
 hostprogs-y     := mktables
 
 # Note: link order is important.  All raid personalities
-# and xor.o must come before md.o, as they each initialise 
+# and must come before md.o, as they each initialise 
 # themselves, and md.o may use the personalities when it 
 # auto-initialised.
 
@@ -25,7 +25,7 @@ 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-$(CONFIG_MD_RAID456)        += raid456.o xor.o
+obj-$(CONFIG_MD_RAID456)        += raid456.o
 obj-$(CONFIG_MD_MULTIPATH)      += multipath.o
 obj-$(CONFIG_MD_FAULTY)         += faulty.o
 obj-$(CONFIG_BLK_DEV_MD)        += md-mod.o
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1c54f3c1cca..33beaa7da08 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5814,7 +5814,7 @@ static __exit void md_exit(void)
         }
 }
 
-module_init(md_init)
+subsys_initcall(md_init);
 module_exit(md_exit)
 
 static int get_ro(char *buffer, struct kernel_param *kp)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 061375ee659..5adbe0b2268 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -918,7 +918,7 @@ static void copy_data(int frombio, struct bio *bio,
 
 #define check_xor()     do {                                            \
                            if (count == MAX_XOR_BLOCKS) {               \
-                                xor_block(count, STRIPE_SIZE, ptr);     \
+                                xor_blocks(count, STRIPE_SIZE, ptr);    \
                                 count = 1;                              \
                            }                                            \
                         } while(0)
@@ -949,7 +949,7 @@ static void compute_block(struct stripe_head *sh, int dd_idx)
                 check_xor();
         }
         if (count != 1)
-                xor_block(count, STRIPE_SIZE, ptr);
+                xor_blocks(count, STRIPE_SIZE, ptr);
         set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
 }
 
@@ -1004,7 +1004,7 @@ static void compute_parity5(struct stripe_head *sh, int method)
                 break;
         }
         if (count>1) {
-                xor_block(count, STRIPE_SIZE, ptr);
+                xor_blocks(count, STRIPE_SIZE, ptr);
                 count = 1;
         }
         
@@ -1038,7 +1038,7 @@ static void compute_parity5(struct stripe_head *sh, int method)
                         }
         }
         if (count != 1)
-                xor_block(count, STRIPE_SIZE, ptr);
+                xor_blocks(count, STRIPE_SIZE, ptr);
         
         if (method != CHECK_PARITY) {
                 set_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
@@ -1160,7 +1160,7 @@ static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero)
                         check_xor();
                 }
                 if (count != 1)
-                        xor_block(count, STRIPE_SIZE, ptr);
+                        xor_blocks(count, STRIPE_SIZE, ptr);
                 if (!nozero) set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
                 else clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
         }
diff --git a/include/linux/raid/xor.h b/include/linux/raid/xor.h
index f0d67cbdea4..7d6c20b654f 100644
--- a/include/linux/raid/xor.h
+++ b/include/linux/raid/xor.h
@@ -5,7 +5,7 @@
 
 #define MAX_XOR_BLOCKS 5
 
-extern void xor_block(unsigned int count, unsigned int bytes, void **ptr);
+extern void xor_blocks(unsigned int count, unsigned int bytes, void **ptr);
 
 struct xor_block_template {
         struct xor_block_template *next;