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由 Rasmus Villemoes 提交于
In the case where one deletes an already-non-existing variable, or sets a variable to the value it already has, there is no point in writing the environment back, thus reducing wear on the underlying storage device. In the case of redundant environments, if the two environments differ (e.g. because one is corrupt), make sure that any call of fw_setenv causes the two to become synchronized, even if the fw_setenv call does not change anything in the good copy. Signed-off-by: NRasmus Villemoes <rasmus.villemoes@prevas.dk> Acked-by: NJoe Hershberger <joe.hershberger@ni.com>
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