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%3Ba=su...
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 stable@vger.kernel.org know about it.
From foo@baz Fri Feb 23 11:45:09 CET 2018
From: Dave Young dyoung@redhat.com Date: Sat, 9 Dec 2017 12:16:10 +0800 Subject: mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep
From: Dave Young dyoung@redhat.com
[ 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.
Signed-off-by: Dave Young dyoung@redhat.com Acked-by: Thomas Gleixner tglx@linutronix.de Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: bp@suse.de Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20171209041610.GA3249@dhcp-128-65.nay.redhat.com Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/early_ioremap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/early_ioremap.c +++ b/mm/early_ioremap.c @@ -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 dyoung@redhat.com are
queue-4.14/mm-early_ioremap-fix-boot-hang-with-earlyprintk-efi-keep.patch