tree 386f9b6b1376ab99a478ab5d394572fca720d0ef
parent 56291e19e37cf3bb8fc701ebf3aa8ffbf59f73ef
author Hugh Dickins <hugh@veritas.com> 1163194360 +0000
committer Paul Mackerras <paulus@samba.org> 1165225160 +1100

[POWERPC] Make soft_enabled irqs preempt safe

Rewrite local_get_flags and local_irq_disable to use r13 explicitly,
to avoid the risk that gcc will split get_paca()->soft_enabled into a
sequence unsafe against preemption.  Similar care in local_irq_restore.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>