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RISC-V: Resurrect smp_mb__after_spinlock()
I removed this last week because of an incorrect comment: smp_mb__after_spinlock() is actually still used, and is necessary on RISC-V. It's been resurrected, with a comment that describes what it actually does this time. Thanks to Andrea for finding the bug! Fixes: 3343eb6 ("RISC-V: Remove smb_mb__{before,after}_spinlock()") CC: Andrea Parri <[email protected]> Signed-off-by: Palmer Dabbelt <[email protected]>
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