wg: fight compiler slightly harder
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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@ -119,7 +119,7 @@ bool key_is_zero(const uint8_t key[static WG_KEY_LEN])
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for (unsigned int i = 0; i < WG_KEY_LEN; ++i) {
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acc |= key[i];
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asm("" : "=r" (acc) : "0" (acc));
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asm volatile("" : "=r"(acc) : "0"(acc));
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}
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return 1 & ((acc - 1) >> 8);
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}
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