bf50aae693
Xtensa uses two instructions to perform atomic compare-and-set instruction: first the comparison register, then the actual instruction to do compare-and-set. There is a potential that context switching is performed before these two instructions. A restored context may have the wrong value in the comparison register. So we need to save and restore the comparison register during context switching. Fixes #21800 Signed-off-by: Daniel Leung <daniel.leung@intel.com> |
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