Commit-ID: 7f6f60a1ba52538c16f26930bfbcfe193d9d746a
Gitweb: https://git.kernel.org/tip/7f6f60a1ba52538c16f26930bfbcfe193d9d746a
Author: Dave Young <dyo...@redhat.com>
AuthorDate: Sat, 9 Dec 2017 12:16:10 +0800
Committer: Ingo Molnar <mi...@kernel.org>
CommitDate: Mon, 11 Dec 2017 14:54:44 +0100
mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep
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 <dyo...@redhat.com>
Acked-by: Thomas Gleixner <t...@linutronix.de>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: b...@suse.de
Cc: linux-...@vger.kernel.org
Cc: linux...@kvack.org
Link: http://lkml.kernel.org/r/20171209041610.ga3...@dhcp-128-65.nay.redhat.com
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
mm/early_ioremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c
index d04ac1e..1826f19 100644
--- a/mm/early_ioremap.c
+++ b/mm/early_ioremap.c
@@ -111,7 +111,7 @@ __early_ioremap(resource_size_t phys_addr, unsigned long
size, pgprot_t prot)
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++) {
