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Bitmask for IRQ stack, save ~112B RAM#3148
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The ARM PRIMASK register only has 1 bit defined, so just save that bitand not the whole 32b returned by save_and_disable_irq().Reduces memory usage by 120 bytes for all apps.
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The ARM PRIMASK register only has 1 bit defined, so just save that bit and not the whole 32b returned by save_and_disable_irq().
Reduces memory usage by 120 bytes for all apps.