[PATCH] setup: Move unmask of async interrupts after possible earlycon setup

[jcm@redhat.com (Jon Masters)]

The kernel wants to enable reporting of asynchronous interrupts (i.e.
System Errors) as early as possible. But if this happens too early
then a pending System Error on initial entry into the kernel will
never be reported where a user can see it (instead it will remain
in the kernel ring buffer and be visible only via hardware debug).
Therefore, move the enabling of asynchronous interrupts to after
parsing any possible earlycon parameters setting up earlycon.

Signed-off-by: Jon Masters <jcm@redhat.com>
---
 arch/arm64/kernel/setup.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index f6f0ccf..f849b88 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -362,11 +362,6 @@ u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
 
 void __init setup_arch(char **cmdline_p)
 {
-	/*
-	 * Unmask asynchronous aborts early to catch possible system errors.
-	 */
-	local_async_enable();
-
 	setup_processor();
 
 	setup_machine_fdt(__fdt_pointer);
@@ -382,6 +377,12 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
+	/*
+	 *  Unmask asynchronous aborts after bringing up possible earlycon.
+	 * (Report possible System Errors once we can report this occurred)
+	 */
+	local_async_enable();
+
 	efi_init();
 	arm64_memblock_init();
 
-- 
1.8.3.1