[PATCH] acpi/ghes: Make ghes_panic_timeout adjustable as a parameter

[Feng Tang <feng.tang@linux.alibaba.com>]

There is a problem report that when debugging a hard-to-reproduce panic
issue, user wanted the kernel to not reboot by adding "panic=0" in
kernel cmdline, so that the panic context could be kept, say the panic
was caught randomly in the mid-night, and user hoped to check it in
the morning. GHES panic handler may overwrite that user setting and
force to reboot after 'ghes_panic_timeout'(30) seconds.

Make 'ghes_panic_timeout' a parameter can provide user some flexibility
to change the timeout on demand, without changing current behavior.

Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
---
 drivers/acpi/apei/ghes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 07789f0b59bc..a8a6310e476a 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -174,6 +174,7 @@ static struct ghes_estatus_cache __rcu *ghes_estatus_caches[GHES_ESTATUS_CACHES_
 static atomic_t ghes_estatus_cache_alloced;
 
 static int ghes_panic_timeout __read_mostly = 30;
+module_param(ghes_panic_timeout, int, 0644);
 
 static void __iomem *ghes_map(u64 pfn, enum fixed_addresses fixmap_idx)
 {
-- 
2.39.5 (Apple Git-154)