Hi Thomas,
Le sam. 9 janv. 2021 à 1:33, Thomas Bogendoerfer
<tsbogend@xxxxxxxxxxxxxxxx> a écrit :
On Sat, Jan 09, 2021 at 12:58:05AM +0100, Thomas Bogendoerfer wrote:
On Fri, Jan 08, 2021 at 08:20:43PM +0000, Paul Cercueil wrote:
> Hi Thomas,
>
> 5.11 does not boot anymore on Ingenic SoCs, I bisected it to this
commit.
>
> Any idea what could be happening?
not yet, kernel crash log of a Malta QEMU is below.
update:
This dirty hack lets the Malta QEMU boot again:
diff --git a/mm/highmem.c b/mm/highmem.c
index c3a9ea7875ef..190cdda1149d 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -515,7 +515,7 @@ void *__kmap_local_pfn_prot(unsigned long pfn,
pgprot_t prot)
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
BUG_ON(!pte_none(*(kmap_pte - idx)));
pteval = pfn_pte(pfn, prot);
- set_pte_at(&init_mm, vaddr, kmap_pte - idx, pteval);
+ set_pte(kmap_pte - idx, pteval);
arch_kmap_local_post_map(vaddr, pteval);
current->kmap_ctrl.pteval[kmap_local_idx()] = pteval;
preempt_enable();
set_pte_at() tries to update cache and could do an kmap_atomic()
there.
Not sure, if this is allowed at this point.
Yes, I can confirm that your workaround works here too.
Cheers,
-Paul
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