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powerpc/powermac: Use early_* IO variants in via_calibrate_decr()
[ Upstream commit 86582e6 ] On a powermac platform, via the call path: start_kernel() time_init() ppc_md.calibrate_decr() (pmac_calibrate_decr) via_calibrate_decr() ioremap() and iounmap() are called. The unmap can enable interrupts unexpectedly (cond_resched() in vunmap_pmd_range()), which causes a warning later in the boot sequence in start_kernel(). Use the early_* variants of these IO functions to prevent this. The issue is pre-existing, but is surfaced by commit 721255b ("genirq: Use a maple tree for interrupt descriptor management"). Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230706010816.72682-1-bgray@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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