jbd2: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>

fs/jbd2/commit.c

@@ -286,10 +286,10 @@ static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh)
 	char *addr;
 	__u32 checksum;
 
-	addr = kmap_atomic(page, KM_USER0);
+	addr = kmap_atomic(page);
 	checksum = crc32_be(crc32_sum,
 		(void *)(addr + offset_in_page(bh->b_data)), bh->b_size);
-	kunmap_atomic(addr, KM_USER0);
+	kunmap_atomic(addr);
 
 	return checksum;
 }

fs/jbd2/journal.c

@@ -345,7 +345,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 		new_offset = offset_in_page(jh2bh(jh_in)->b_data);
 	}
 
-	mapped_data = kmap_atomic(new_page, KM_USER0);
+	mapped_data = kmap_atomic(new_page);
 	/*
 	 * Fire data frozen trigger if data already wasn't frozen.  Do this
 	 * before checking for escaping, as the trigger may modify the magic
@@ -364,7 +364,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 		need_copy_out = 1;
 		do_escape = 1;
 	}
-	kunmap_atomic(mapped_data, KM_USER0);
+	kunmap_atomic(mapped_data);
 
 	/*
 	 * Do we need to do a data copy?
@@ -385,9 +385,9 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 		}
 
 		jh_in->b_frozen_data = tmp;
-		mapped_data = kmap_atomic(new_page, KM_USER0);
+		mapped_data = kmap_atomic(new_page);
 		memcpy(tmp, mapped_data + new_offset, jh2bh(jh_in)->b_size);
-		kunmap_atomic(mapped_data, KM_USER0);
+		kunmap_atomic(mapped_data);
 
 		new_page = virt_to_page(tmp);
 		new_offset = offset_in_page(tmp);
@@ -406,9 +406,9 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 	 * copying, we can finally do so.
 	 */
 	if (do_escape) {
-		mapped_data = kmap_atomic(new_page, KM_USER0);
+		mapped_data = kmap_atomic(new_page);
 		*((unsigned int *)(mapped_data + new_offset)) = 0;
-		kunmap_atomic(mapped_data, KM_USER0);
+		kunmap_atomic(mapped_data);
 	}
 
 	set_bh_page(new_bh, new_page, new_offset);

fs/jbd2/transaction.c

@@ -783,12 +783,12 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
 			    "Possible IO failure.\n");
 		page = jh2bh(jh)->b_page;
 		offset = offset_in_page(jh2bh(jh)->b_data);
-		source = kmap_atomic(page, KM_USER0);
+		source = kmap_atomic(page);
 		/* Fire data frozen trigger just before we copy the data */
 		jbd2_buffer_frozen_trigger(jh, source + offset,
 					   jh->b_triggers);
 		memcpy(jh->b_frozen_data, source+offset, jh2bh(jh)->b_size);
-		kunmap_atomic(source, KM_USER0);
+		kunmap_atomic(source);
 
 		/*
 		 * Now that the frozen data is saved off, we need to store