Hi, Greg
On Tue, 1 Nov 2022 at 14:26, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Tue, Nov 01, 2022 at 02:07:35PM +0800, Yongqin Liu wrote:
> > Hello,
> >
> > As mentioned in the thread for the 5.4 version here[1], it causes a
> > crash for the 4.19 kernel too.
> > Just paste the log here for reference:
>
> Can you try this patch please:
>
>
> diff --git a/include/linux/once.h b/include/linux/once.h
> index bb58e1c3aa03..3a6671d961b9 100644
> --- a/include/linux/once.h
> +++ b/include/linux/once.h
> @@ -64,7 +64,7 @@ void __do_once_slow_done(bool *done, struct static_key_true *once_key,
> #define DO_ONCE_SLOW(func, ...) \
> ({ \
> bool ___ret = false; \
> - static bool __section(".data.once") ___done = false; \
> + static bool __section(.data.once) ___done = false; \
> static DEFINE_STATIC_KEY_TRUE(___once_key); \
> if (static_branch_unlikely(&___once_key)) { \
> ___ret = __do_once_slow_start(&___done); \
This change works, it does not cause kernel panic again after this
change is applied.
--
Best Regards,
Yongqin Liu
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