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-rw-r--r--crypto/Kconfig6
-rw-r--r--crypto/Makefile6
-rw-r--r--crypto/xor.c (renamed from drivers/md/xor.c)30
-rw-r--r--drivers/md/Kconfig1
-rw-r--r--drivers/md/Makefile4
-rw-r--r--drivers/md/md.c2
-rw-r--r--drivers/md/raid5.c10
-rw-r--r--include/linux/raid/xor.h2
8 files changed, 38 insertions, 23 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 4ca0ab3448d9..b749a1a46e22 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 cce46a1c9dc7..68e934b4bee2 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 324897c4be4e..8281ac5e68a8 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 7df934d69134..24d93d02a1f3 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 38754084eac7..71eb45f74171 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 1c54f3c1cca7..33beaa7da085 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 061375ee6592..5adbe0b22684 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 f0d67cbdea40..7d6c20b654fa 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;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.