On Wed, 26 May 2021 20:16:14 -0400 Qian Cai <quic_qiancai@xxxxxxxxxxx> wrote: > > > On 5/26/2021 1:24 PM, Mike Rapoport wrote: > > On Wed, May 26, 2021 at 12:09:14PM +0000, Qian Cai (QUIC) wrote: > >>> > >>> On Tue, May 25, 2021 at 03:25:59PM +0000, Qian Cai (QUIC) wrote: > >>>> Reverting the patchset "arm64: drop pfn_valid_within() and simplify pfn_valid()" [1] from today's linux-next fixed a crash while > >>> reading files under /sys/devices/system/memory. > > > > Does the issue persist of you only revert the latest patch in the series? > > In next-20210525 it would be commit > > 89fb47db72f2 ("arm64-drop-pfn_valid_within-and-simplify-pfn_valid-fix") > > and commit > > dfe215e9bac2 ("arm64: drop pfn_valid_within() and simplify pfn_valid()"). > > Reverting those two commits alone is enough to fix the issue. (cc Stephen) Thanks, I'll drop arm64-drop-pfn_valid_within-and-simplify-pfn_valid.patch arm64-drop-pfn_valid_within-and-simplify-pfn_valid-fix.patch