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| author | Sven Schnelle <svens@linux.ibm.com> | 2021-12-06 13:50:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-22 11:32:36 +0300 |
| commit | 2eeff00926e572e4ddb7f40f2fc452abb1a4c7d4 (patch) | |
| tree | 1c1ee8b4c67a8f924919b640dcefd572d1a56319 /scripts | |
| parent | b08b3bfcc720686cd73888ab20111acd9cbfcb19 (diff) | |
| download | linux-2eeff00926e572e4ddb7f40f2fc452abb1a4c7d4.tar.xz | |
s390/entry: fix duplicate tracking of irq nesting level
commit c9b12b59e2ea4c3c7cedec7efb071b649652f3a9 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions