[PATCH] EDAC/amd64: Comment on which dram_type to use

[Yazen Ghannam]

A copy of enum mem_type was added to struct amd64_umc so that memory
type can be properly identified on each independent Unified Memory
Controller.

Add a comment to the original struct amd64_pvt variable to indicate it
shouldn't be used on newer systems.

Signed-off-by: Yazen Ghannam <yazen.ghannam@xxxxxxx>
---
 drivers/edac/amd64_edac.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 6f8147abfa71..38e5ad95d010 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -397,7 +397,12 @@ struct amd64_pvt {
 	/* place to store error injection parameters prior to issue */
 	struct error_injection injection;
 
-	/* cache the dram_type */
+	/*
+	 * cache the dram_type
+	 *
+	 * NOTE: Don't use this for Family 17h and later.
+	 *	 Use dram_type in struct amd64_umc instead.
+	 */
 	enum mem_type dram_type;
 
 	struct amd64_umc *umc;	/* UMC registers */
-- 
2.25.1