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/linux-master/fs/bcachefs/
H A Dmean_and_variance.c120 s64 diff_w = x_w - s->mean; local
121 s64 diff = fast_divpow2(diff_w, w);
130 s->variance = ((var_w0 << w) - var_w0 + ((diff_w * (x_w - u_w1)) >> w)) >> w;

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