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authorNicholas Piggin <npiggin@gmail.com>2021-06-18 01:51:09 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2021-06-25 00:06:56 +1000
commit862fa563524b9f92d7e89fe332732bd3421772db (patch)
treec7f75465c50546df29531924bd0e993bd5e62e83 /arch/alpha
parentf23699c93becd746295aaa506537882a46a62219 (diff)
powerpc/64: interrupt soft-enable race fix
Prevent interrupt restore from allowing racing hard interrupts going ahead of previous soft-pending ones, by using the soft-masked restart handler to allow a store to clear the soft-mask while knowing nothing is soft-pending. This probably doesn't matter much in practice, but it's a simple demonstrator / test case to exercise the restart table logic. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210617155116.2167984-11-npiggin@gmail.com
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