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由 Aurelien Jarno 提交于
Commit 00b73d8d ("sh: add working futex atomic ops on userspace addresses for smp") changed the futex_atomic_op_inuser function to use a loop. In case of the FUTEX_OP_SET op with a userspace address containing a value different of 0, this loop is an endless loop. Fix that by loading the value of oldval from the userspace before doing the cmpxchg op, also for the FUTEX_OP_SET case. Signed-off-by: NAurelien Jarno <aurelien@aurel32.net> Signed-off-by: NRich Felker <dalias@libc.org>
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