[Bug 215781] Highmem support broken on kernels greater 5.15.x on ppc32?

[bugzilla-daemon at kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215781

--- Comment #4 from Christophe Leroy (christophe.leroy at csgroup.eu) ---
This problem was introduced in 5.15 by commit 602946ec2f90 ("powerpc: Set
max_mapnr correctly")

A similar issue has been opened at
https://github.com/linuxppc/issues/issues/399

Following series should fix it:
https://patchwork.ozlabs.org/project/linuxppc-dev/list/?state=*&series=286464

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