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由 Odin Ugedal 提交于
stable inclusion from linux-4.19.199 commit aa36bd8fc187f513af2d250b82a3c913053ceaf1 -------------------------------- [ Upstream commit 72d0ad7c ] The time remaining until expiry of the refresh_timer can be negative. Casting the type to an unsigned 64-bit value will cause integer underflow, making the runtime_refresh_within return false instead of true. These situations are rare, but they do happen. This does not cause user-facing issues or errors; other than possibly unthrottling cfs_rq's using runtime from the previous period(s), making the CFS bandwidth enforcement less strict in those (special) situations. Signed-off-by: NOdin Ugedal <odin@uged.al> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: NBen Segall <bsegall@google.com> Link: https://lore.kernel.org/r/20210629121452.18429-1-odin@uged.alSigned-off-by: NSasha Levin <sashal@kernel.org> Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
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