@@ -26,6 +26,7 @@
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
+#include <linux/highmem.h>
#include <linux/dma-mapping.h>
#include <linux/raid/xor.h>
#include <linux/async_tx.h>
@@ -126,7 +127,7 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
int src_cnt, size_t len, struct async_submit_ctl *submit)
{
int i;
- int xor_src_cnt = 0;
+ int xor_src_cnt = 0, kmap_cnt=0;
int src_off = 0;
void *dest_buf;
void **srcs;
@@ -138,11 +139,13 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
/* convert to buffer pointers */
for (i = 0; i < src_cnt; i++)
- if (src_list[i])
- srcs[xor_src_cnt++] = page_address(src_list[i]) + offset;
+ if (src_list[i]) {
+ srcs[xor_src_cnt++] = kmap_atomic(src_list[i], KM_USER1) + offset;
+ }
+ kmap_cnt = xor_src_cnt;
src_cnt = xor_src_cnt;
/* set destination address */
- dest_buf = page_address(dest) + offset;
+ dest_buf = kmap_atomic(dest, KM_USER0) + offset;
if (submit->flags & ASYNC_TX_XOR_ZERO_DST)
memset(dest_buf, 0, len);
@@ -157,6 +160,11 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
src_off += xor_src_cnt;
}
+ kunmap_atomic(dest_buf, KM_USER0);
+ for (i = 0; i < kmap_cnt; i++)
+ if (src_list[i])
+ kunmap_atomic(srcs[i], KM_USER1);
+
async_tx_sync_epilog(submit);
}