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powerpc64: fix loader regression

Description

powerpc64: fix loader regression

After b4cb3fe0e39a, loader started crashing on PowerPC64, with a
Program Exception (700) error. The problem was that archsw was
used before being initialized, with the new mount feature. This
change fixes the issue by initializing archsw earlier, before
setting currdev, that triggers the mount.

Reviewed by: tsoome
MFC after: 1 month
X-MFC-With: b4cb3fe0e39a
Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D32027

Details

Provenance
luporlAuthored on Sep 21 2021, 8:22 PM
Reviewer
R10:b4cb3fe0e39a: loader: implement mount/unmount rootfs
Differential Revision
D32027: powerpc64: fix loader regression
Parents
R10:bd84094a51c4: sched_ule(4): Fix interactive threads stealing.
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