Patch "mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep" 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

mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep

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:
mm-early_ioremap-fix-boot-hang-with-earlyprintk-efi-keep.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.

From: Dave Young <[email protected]>
Date: Sat, 9 Dec 2017 12:16:10 +0800
Subject: mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep

From: Dave Young <[email protected]>

[ Upstream commit 7f6f60a1ba52538c16f26930bfbcfe193d9d746a ]

earlyprintk=efi,keep does not work any more with a warning in mm/early_ioremap.c: WARN_ON(system_state != SYSTEM_BOOTING):
Boot just hangs because of the earlyprintk within the earlyprintk implementation code itself.

This is caused by a new introduced middle state in:

69a78ff226fe ("init: Introduce SYSTEM_SCHEDULING state")

early_ioremap() is fine in both SYSTEM_BOOTING and SYSTEM_SCHEDULING states, original condition should be updated accordingly.

---
 mm/early_ioremap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -111,7 +111,7 @@ __early_ioremap(resource_size_t phys_add
 	enum fixed_addresses idx;
 	int i, slot;
 
-	WARN_ON(system_state != SYSTEM_BOOTING);
+	WARN_ON(system_state >= SYSTEM_RUNNING);
 
 	slot = -1;
 	for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {

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

queue-4.14/mm-early_ioremap-fix-boot-hang-with-earlyprintk-efi-keep.patch