pstore/ram: Add ramoops_console_write_buf api

Allow writing into the ramoops console buffer.

Change-Id: Iff0d69b562e4dae33ea7f8d19412227bebb17e47
Signed-off-by: Arve Hjønnevåg <arve@android.com>
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 6ad831b..bd2dc34 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -549,6 +549,12 @@
 	return 0;
 }
 
+void notrace ramoops_console_write_buf(const char *buf, size_t size)
+{
+	struct ramoops_context *cxt = &oops_cxt;
+	persistent_ram_write(cxt->cprz, buf, size);
+}
+
 static int ramoops_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;