[PATCH] Fix Oops due to use of incorrect km_type in RPC socket code...

The following has been vetted with davem w.r.t. the change to
KM_SKB_DATA. Apologies for the bug...

include/asm-*/kmap_types.h:
   Replace the unused km_type slot KM_SKB_DATA with
   KM_SKB_SUNRPC_DATA.

net/sunrpc/xdr.c:
   Replace the use of KM_USER0 with KM_SKB_SUNRPC_DATA for copying
   data from an skb into the page cache when in the sk->data_ready()
   callback.

include/asm-i386/kmap_types.h

@@ -11,7 +11,7 @@
 
 enum km_type {
 D(0)	KM_BOUNCE_READ,
-D(1)	KM_SKB_DATA,
+D(1)	KM_SKB_SUNRPC_DATA,
 D(2)	KM_SKB_DATA_SOFTIRQ,
 D(3)	KM_USER0,
 D(4)	KM_USER1,

include/asm-ppc/kmap_types.h

@@ -7,7 +7,7 @@
 
 enum km_type {
 	KM_BOUNCE_READ,
-	KM_SKB_DATA,
+	KM_SKB_SUNRPC_DATA,
 	KM_SKB_DATA_SOFTIRQ,
 	KM_USER0,
 	KM_USER1,

include/asm-sparc/kmap_types.h

@@ -3,7 +3,7 @@
 
 enum km_type {
 	KM_BOUNCE_READ,
-	KM_SKB_DATA,
+	KM_SKB_SUNRPC_DATA,
 	KM_SKB_DATA_SOFTIRQ,
 	KM_USER0,
 	KM_USER1,

include/asm-x86_64/kmap_types.h

@@ -3,7 +3,7 @@
 
 enum km_type {
 	KM_BOUNCE_READ,
-	KM_SKB_DATA,
+	KM_SKB_SUNRPC_DATA,
 	KM_SKB_DATA_SOFTIRQ,
 	KM_USER0,
 	KM_USER1,

net/sunrpc/xdr.c

@@ -290,7 +290,7 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
 		char *kaddr;
 
 		len = PAGE_CACHE_SIZE;
-		kaddr = kmap_atomic(*ppage, KM_USER0);
+		kaddr = kmap_atomic(*ppage, KM_SKB_SUNRPC_DATA);
 		if (base) {
 			len -= base;
 			if (pglen < len)
@@ -302,7 +302,7 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base,
 				len = pglen;
 			ret = copy_actor(desc, kaddr, len);
 		}
-		kunmap_atomic(kaddr, KM_USER0);
+		kunmap_atomic(kaddr, KM_SKB_SUNRPC_DATA);
 		if (ret != len || !desc->count)
 			return;
 		ppage++;