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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2020-02-14 06:53:00 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-02-18 21:31:12 +1100 |
| commit | 477f3488a94e35380c82a7498d46f10fa5f3edd2 (patch) | |
| tree | 440d25a672785bf7d01cb627ebb3c303017a7f4e /kernel/bpf/arraymap.c | |
| parent | 5a528eb67908bcf493f3583cb4726fbd8e129605 (diff) | |
powerpc/6xx: Fix power_save_ppc32_restore() with CONFIG_VMAP_STACK
power_save_ppc32_restore() is called during exception entry, before
re-enabling the MMU. It substracts KERNELBASE from the address
of nap_save_msscr0 to access it.
With CONFIG_VMAP_STACK enabled, data MMU translation has already been
re-enabled, so power_save_ppc32_restore() has to access
nap_save_msscr0 by its virtual address.
Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK")
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7bce32ccbab3ba3e3e0f27da6961bf6313df97ed.1581663140.git.christophe.leroy@c-s.fr
Diffstat (limited to 'kernel/bpf/arraymap.c')
0 files changed, 0 insertions, 0 deletions