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| author | Sven Schnelle <svens@linux.ibm.com> | 2021-12-06 11:50:16 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-12-12 18:52:26 +0100 |
| commit | c9b12b59e2ea4c3c7cedec7efb071b649652f3a9 (patch) | |
| tree | dfbe454db40c768b6c0955ee0846122ab06fdbd4 /scripts | |
| parent | 5dcf0c3084eb098bbb702f2f5ee55666047997d4 (diff) | |
| download | lwn-c9b12b59e2ea4c3c7cedec7efb071b649652f3a9.tar.gz lwn-c9b12b59e2ea4c3c7cedec7efb071b649652f3a9.zip | |
s390/entry: fix duplicate tracking of irq nesting level
In the current code, when exiting from idle, rcu_irq_enter() is
called twice during irq entry:
irq_entry_enter()-> rcu_irq_enter()
irq_enter() -> rcu_irq_enter()
This may lead to wrong results from rcu_is_cpu_rrupt_from_idle()
because of a wrong dynticks nmi nesting count. Fix this by only
calling irq_enter_rcu().
Cc: <stable@vger.kernel.org> # 5.12+
Reported-by: Mark Rutland <mark.rutland@arm.com>
Fixes: 56e62a737028 ("s390: convert to generic entry")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions