powerpc/pseries: Re-organise the oops compression code

nvram_compress() and zip_oops() is used by the nvram_pstore_write
API to compress oops messages hence re-organise the functions
accordingly to avoid forward declarations.
Signed-off-by: NAruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/nvram.c

@@ -486,6 +486,58 @@ static int clobbering_unread_rtas_event(void)
 						NVRAM_RTAS_READ_TIMEOUT);
 }
 
+/* Derived from logfs_compress() */
+static int nvram_compress(const void *in, void *out, size_t inlen,
+							size_t outlen)
+{
+	int err, ret;
+
+	ret = -EIO;
+	err = zlib_deflateInit2(&stream, COMPR_LEVEL, Z_DEFLATED, WINDOW_BITS,
+						MEM_LEVEL, Z_DEFAULT_STRATEGY);
+	if (err != Z_OK)
+		goto error;
+
+	stream.next_in = in;
+	stream.avail_in = inlen;
+	stream.total_in = 0;
+	stream.next_out = out;
+	stream.avail_out = outlen;
+	stream.total_out = 0;
+
+	err = zlib_deflate(&stream, Z_FINISH);
+	if (err != Z_STREAM_END)
+		goto error;
+
+	err = zlib_deflateEnd(&stream);
+	if (err != Z_OK)
+		goto error;
+
+	if (stream.total_out >= stream.total_in)
+		goto error;
+
+	ret = stream.total_out;
+error:
+	return ret;
+}
+
+/* Compress the text from big_oops_buf into oops_buf. */
+static int zip_oops(size_t text_len)
+{
+	struct oops_log_info *oops_hdr = (struct oops_log_info *)oops_buf;
+	int zipped_len = nvram_compress(big_oops_buf, oops_data, text_len,
+								oops_data_sz);
+	if (zipped_len < 0) {
+		pr_err("nvram: compression failed; returned %d\n", zipped_len);
+		pr_err("nvram: logging uncompressed oops/panic report\n");
+		return -1;
+	}
+	oops_hdr->version = OOPS_HDR_VERSION;
+	oops_hdr->report_length = (u16) zipped_len;
+	oops_hdr->timestamp = get_seconds();
+	return 0;
+}
+
 #ifdef CONFIG_PSTORE
 static int nvram_pstore_open(struct pstore_info *psi)
 {
@@ -759,58 +811,6 @@ int __init pSeries_nvram_init(void)
 }
 
 
-/* Derived from logfs_compress() */
-static int nvram_compress(const void *in, void *out, size_t inlen,
-							size_t outlen)
-{
-	int err, ret;
-
-	ret = -EIO;
-	err = zlib_deflateInit2(&stream, COMPR_LEVEL, Z_DEFLATED, WINDOW_BITS,
-						MEM_LEVEL, Z_DEFAULT_STRATEGY);
-	if (err != Z_OK)
-		goto error;
-
-	stream.next_in = in;
-	stream.avail_in = inlen;
-	stream.total_in = 0;
-	stream.next_out = out;
-	stream.avail_out = outlen;
-	stream.total_out = 0;
-
-	err = zlib_deflate(&stream, Z_FINISH);
-	if (err != Z_STREAM_END)
-		goto error;
-
-	err = zlib_deflateEnd(&stream);
-	if (err != Z_OK)
-		goto error;
-
-	if (stream.total_out >= stream.total_in)
-		goto error;
-
-	ret = stream.total_out;
-error:
-	return ret;
-}
-
-/* Compress the text from big_oops_buf into oops_buf. */
-static int zip_oops(size_t text_len)
-{
-	struct oops_log_info *oops_hdr = (struct oops_log_info *)oops_buf;
-	int zipped_len = nvram_compress(big_oops_buf, oops_data, text_len,
-								oops_data_sz);
-	if (zipped_len < 0) {
-		pr_err("nvram: compression failed; returned %d\n", zipped_len);
-		pr_err("nvram: logging uncompressed oops/panic report\n");
-		return -1;
-	}
-	oops_hdr->version = OOPS_HDR_VERSION;
-	oops_hdr->report_length = (u16) zipped_len;
-	oops_hdr->timestamp = get_seconds();
-	return 0;
-}
-
 /*
  * This is our kmsg_dump callback, called after an oops or panic report
  * has been written to the printk buffer.  We want to capture as much