Re: [PATCH 1/1] mm: vmalloc: Bail out early in find_vmap_area() if vmap is not init

[Heiko Carstens]

On Sat, Mar 23, 2024 at 03:15:44PM +0100, Uladzislau Rezki (Sony) wrote:
> During the boot the s390 system triggers "spinlock bad magic" messages
> if the spinlock debugging is enabled:
..
> Some background. It worked before because the lock that is in question
> was statically defined and initialized. As of now, the locks and data
> structures are initialized in the vmalloc_init() function.
> 
> To address that issue add the check whether the "vmap_initialized"
> variable is set, if not find_vmap_area() bails out on entry returning NULL.
> 
> Fixes: 72210662c5a2 ("mm: vmalloc: offload free_vmap_area_lock lock")
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
> ---
>  mm/vmalloc.c | 3 +++
>  1 file changed, 3 insertions(+)

Thanks for fixing this, and FWIW:
Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx>