Commit 98b8e4e5 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Darren Hart (VMware)
Browse files

platform/x86: wmi: Call acpi_wmi_init() later

Calling acpi_wmi_init() at the subsys_initcall() level causes ordering
issues to appear on some systems and they are difficult to reproduce,
because there is no guaranteed ordering between subsys_initcall()
calls, so they may occur in different orders on different systems.

In particular, commit 86d9f485 (mm/slab: fix kmemcg cache
creation delayed issue) exposed one of these issues where genl_init()
and acpi_wmi_init() are both called at the same initcall level, but
the former must run before the latter so as to avoid a NULL pointer

For this reason, move the acpi_wmi_init() invocation to the
initcall_sync level which should still be early enough for things
to work correctly in the WMI land.


Reported-by: default avatarJonathan McDowell <>
Reported-by: default avatarJoonsoo Kim <>
Tested-by: default avatarJonathan McDowell <>
Signed-off-by: default avatarRafael J. Wysocki <>
Signed-off-by: default avatarDarren Hart (VMware) <>
parent 532298b9
......@@ -1458,5 +1458,5 @@ static void __exit acpi_wmi_exit(void)
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment