1 files changed, 27 insertions, 27 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 5adbe0b22684..4f51dfa8e487 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -916,25 +916,25 @@ static void copy_data(int frombio, struct bio *bio,
         }
 }
 
-#define check_xor()     do {                                            \
-                           if (count == MAX_XOR_BLOCKS) {               \
-                                xor_blocks(count, STRIPE_SIZE, ptr);    \
-                                count = 1;                              \
-                           }                                            \
+#define check_xor()     do {                                              \
+                                if (count == MAX_XOR_BLOCKS) {            \
+                                xor_blocks(count, STRIPE_SIZE, dest, ptr);\
+                                count = 0;                                \
+                           }                                              \
                         } while(0)
 
 
 static void compute_block(struct stripe_head *sh, int dd_idx)
 {
         int i, count, disks = sh->disks;
-        void *ptr[MAX_XOR_BLOCKS], *p;
+        void *ptr[MAX_XOR_BLOCKS], *dest, *p;
 
         PRINTK("compute_block, stripe %llu, idx %d\n", 
                 (unsigned long long)sh->sector, dd_idx);
 
-        ptr[0] = page_address(sh->dev[dd_idx].page);
-        memset(ptr[0], 0, STRIPE_SIZE);
-        count = 1;
+        dest = page_address(sh->dev[dd_idx].page);
+        memset(dest, 0, STRIPE_SIZE);
+        count = 0;
         for (i = disks ; i--; ) {
                 if (i == dd_idx)
                         continue;
@@ -948,8 +948,8 @@ static void compute_block(struct stripe_head *sh, int dd_idx)
 
                 check_xor();
         }
-        if (count != 1)
-                xor_blocks(count, STRIPE_SIZE, ptr);
+        if (count)
+                xor_blocks(count, STRIPE_SIZE, dest, ptr);
         set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
 }
 
@@ -957,14 +957,14 @@ static void compute_parity5(struct stripe_head *sh, int method)
 {
         raid5_conf_t *conf = sh->raid_conf;
         int i, pd_idx = sh->pd_idx, disks = sh->disks, count;
-        void *ptr[MAX_XOR_BLOCKS];
+        void *ptr[MAX_XOR_BLOCKS], *dest;
         struct bio *chosen;
 
         PRINTK("compute_parity5, stripe %llu, method %d\n",
                 (unsigned long long)sh->sector, method);
 
-        count = 1;
-        ptr[0] = page_address(sh->dev[pd_idx].page);
+        count = 0;
+        dest = page_address(sh->dev[pd_idx].page);
         switch(method) {
         case READ_MODIFY_WRITE:
                 BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags));
@@ -987,7 +987,7 @@ static void compute_parity5(struct stripe_head *sh, int method)
                 }
                 break;
         case RECONSTRUCT_WRITE:
-                memset(ptr[0], 0, STRIPE_SIZE);
+                memset(dest, 0, STRIPE_SIZE);
                 for (i= disks; i-- ;)
                         if (i!=pd_idx && sh->dev[i].towrite) {
                                 chosen = sh->dev[i].towrite;
@@ -1003,9 +1003,9 @@ static void compute_parity5(struct stripe_head *sh, int method)
         case CHECK_PARITY:
                 break;
         }
-        if (count>1) {
-                xor_blocks(count, STRIPE_SIZE, ptr);
-                count = 1;
+        if (count) {
+                xor_blocks(count, STRIPE_SIZE, dest, ptr);
+                count = 0;
         }
         
         for (i = disks; i--;)
@@ -1037,9 +1037,9 @@ static void compute_parity5(struct stripe_head *sh, int method)
                                 check_xor();
                         }
         }
-        if (count != 1)
-                xor_blocks(count, STRIPE_SIZE, ptr);
-        
+        if (count)
+                xor_blocks(count, STRIPE_SIZE, dest, ptr);
+
         if (method != CHECK_PARITY) {
                 set_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
                 set_bit(R5_LOCKED,   &sh->dev[pd_idx].flags);
@@ -1132,7 +1132,7 @@ static void compute_parity6(struct stripe_head *sh, int method)
 static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero)
 {
         int i, count, disks = sh->disks;
-        void *ptr[MAX_XOR_BLOCKS], *p;
+        void *ptr[MAX_XOR_BLOCKS], *dest, *p;
         int pd_idx = sh->pd_idx;
         int qd_idx = raid6_next_disk(pd_idx, disks);
 
@@ -1143,9 +1143,9 @@ static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero)
                 /* We're actually computing the Q drive */
                 compute_parity6(sh, UPDATE_PARITY);
         } else {
-                ptr[0] = page_address(sh->dev[dd_idx].page);
-                if (!nozero) memset(ptr[0], 0, STRIPE_SIZE);
-                count = 1;
+                dest = page_address(sh->dev[dd_idx].page);
+                if (!nozero) memset(dest, 0, STRIPE_SIZE);
+                count = 0;
                 for (i = disks ; i--; ) {
                         if (i == dd_idx || i == qd_idx)
                                 continue;
@@ -1159,8 +1159,8 @@ static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero)
 
                         check_xor();
                 }
-                if (count != 1)
-                        xor_blocks(count, STRIPE_SIZE, ptr);
+                if (count)
+                        xor_blocks(count, STRIPE_SIZE, dest, ptr);
                 if (!nozero) set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
                 else clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
         }