Patch "x86/spectre: Check CONFIG_RETPOLINE in command line parser" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

x86/spectre: Check CONFIG_RETPOLINE in command line parser

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
x86spectre_Check_CONFIG_RETPOLINE_in_command_line_parser.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Subject: x86/spectre: Check CONFIG_RETPOLINE in command line parser
From: Dou Liyang [email protected]
Date: Tue Jan 30 14:13:50 2018 +0800

From: Dou Liyang [email protected]

commit 9471eee9186a46893726e22ebb54cade3f9bc043

The spectre_v2 option 'auto' does not check whether CONFIG_RETPOLINE is enabled. As a consequence it fails to emit the appropriate warning and sets feature flags which have no effect at all.

Add the missing IS_ENABLED() check.

---
 arch/x86/kernel/cpu/bugs.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -213,10 +213,10 @@ static void __init spectre_v2_select_mit
 		return;
 
 	case SPECTRE_V2_CMD_FORCE:
-		/* FALLTRHU */
 	case SPECTRE_V2_CMD_AUTO:
-		goto retpoline_auto;
-
+		if (IS_ENABLED(CONFIG_RETPOLINE))
+			goto retpoline_auto;
+		break;
 	case SPECTRE_V2_CMD_RETPOLINE_AMD:
 		if (IS_ENABLED(CONFIG_RETPOLINE))
 			goto retpoline_amd;

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/x86spectre_Check_CONFIG_RETPOLINE_in_command_line_parser.patch