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lavu/timer: remove gratuitous volatile
AV_READ_TIME has no side effects. It does not need to be volatile.
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@ -29,13 +29,13 @@ static inline uint64_t ff_read_time(void)
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#if (__riscv_xlen >= 64)
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uintptr_t cycles;
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__asm__ volatile ("rdtime %0" : "=r" (cycles));
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__asm__ ("rdtime %0" : "=r" (cycles));
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#else
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uint64_t cycles;
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uint32_t hi, lo, check;
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__asm__ volatile (
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__asm__ (
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"1: rdtimeh %0\n"
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" rdtime %1\n"
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" rdtimeh %2\n"
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