markers: fix unregister

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Impact: fix marker registers/unregister race

get_marker() can return a NULL entry because the mutex is released in
the middle of those functions. Make sure we check to see if it has been
concurrently removed.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Mathieu Desnoyers 2008-11-14 17:47:35 -05:00 • committed by Ingo Molnar

parent 954e100d22

commit 2bdba316c9

1 changed files with 7 additions and 5 deletions

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kernel/marker.c

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