The patch titled
Subject: mm: add lockdep annotation to pgdat_init_all_done_comp completer
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-add-lockdep-annotation-to-pgdat_init_all_done_comp-completer.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-lockdep-annotation-to-pgdat_init_all_done_comp-completer.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Helge Deller <deller@xxxxxx>
Subject: mm: add lockdep annotation to pgdat_init_all_done_comp completer
Date: Fri, 11 Aug 2023 18:06:19 +0200
Add the missing lockdep annotation to avoid this kernel warning:
smp: Brought up 1 node, 1 CPU
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?'
turning off the locking correctness validator.
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.5.0-rc5+ #683
Hardware name: 9000/785/C3700
Backtrace:
[<000000004030bcd0>] show_stack+0x74/0xb0
[<000000004146c63c>] dump_stack_lvl+0x104/0x180
[<000000004146c6ec>] dump_stack+0x34/0x48
[<000000004040e5b4>] register_lock_class+0xd24/0xd30
[<000000004040c21c>] __lock_acquire.isra.0+0xb4/0xac8
[<000000004040cd60>] lock_acquire+0x130/0x298
[<000000004147095c>] _raw_spin_lock_irq+0x60/0xb8
[<0000000041474a4c>] wait_for_completion+0xa0/0x2d0
[<000000004012bf04>] page_alloc_init_late+0xf8/0x2b0
[<0000000040102b20>] kernel_init_freeable+0x464/0x7f0
[<000000004146df68>] kernel_init+0x64/0x3a8
[<0000000040302020>] ret_from_kernel_thread+0x20/0x28
Link: https://lkml.kernel.org/r/ZNZce1KGxP1dxpTN@p100
Signed-off-by: Helge Deller <deller@xxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mm_init.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/mm_init.c~mm-add-lockdep-annotation-to-pgdat_init_all_done_comp-completer
+++ a/mm/mm_init.c
@@ -2377,6 +2377,7 @@ void __init page_alloc_init_late(void)
int nid;
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+ init_completion(&pgdat_init_all_done_comp);
/* There will be num_node_state(N_MEMORY) threads */
atomic_set(&pgdat_init_n_undone, num_node_state(N_MEMORY));
_
Patches currently in -mm which might be from deller@xxxxxx are
mm-add-lockdep-annotation-to-pgdat_init_all_done_comp-completer.patch
init-add-lockdep-annotation-to-kthreadd_done-completer.patch
