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20d143e2ca
Recent upstream Linux uses the MONITOR CALL instruction for things like BUG_ON() and WARN_ON(). We currently inject an operation exception when we hit a MONITOR CALL instruction - which is wrong, as the instruction is not glued to specific CPU features. Doing a simple WARN_ON_ONCE() currently results in a panic: [ 18.162801] illegal operation: 0001 ilc:2 [#1] SMP [ 18.162889] Modules linked in: [...] [ 18.165476] Kernel panic - not syncing: Fatal exception: panic_on_oops With a proper implementation, we now get: [ 18.242754] ------------[ cut here ]------------ [ 18.242855] WARNING: CPU: 7 PID: 1 at init/main.c:1534 [...] [ 18.242919] Modules linked in: [...] [ 18.246262] ---[ end trace a420477d71dc97b4 ]--- [ 18.259014] Freeing unused kernel memory: 4220K Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200918085122.26132-1-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com> |
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