kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/lib/mpi/mpi-cmp.c
..
..
@@ -41,28 +41,54 @@
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 }
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 EXPORT_SYMBOL_GPL(mpi_cmp_ui);
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-int mpi_cmp(MPI u, MPI v)
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+static int do_mpi_cmp(MPI u, MPI v, int absmode)
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 {
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-	mpi_size_t usize, vsize;
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+	mpi_size_t usize;
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+	mpi_size_t vsize;
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+	int usign;
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+	int vsign;
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 	int cmp;
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 	mpi_normalize(u);
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 	mpi_normalize(v);
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+
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 	usize = u->nlimbs;
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 	vsize = v->nlimbs;
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-	if (!u->sign && v->sign)
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+	usign = absmode ? 0 : u->sign;
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+	vsign = absmode ? 0 : v->sign;
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+
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+	/* Compare sign bits.  */
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+
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+	if (!usign && vsign)
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 		return 1;
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-	if (u->sign && !v->sign)
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+	if (usign && !vsign)
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 		return -1;
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-	if (usize != vsize && !u->sign && !v->sign)
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+
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+	/* U and V are either both positive or both negative.  */
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+
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+	if (usize != vsize && !usign && !vsign)
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 		return usize - vsize;
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-	if (usize != vsize && u->sign && v->sign)
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-		return vsize - usize;
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+	if (usize != vsize && usign && vsign)
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+		return vsize + usize;
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 	if (!usize)
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 		return 0;
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 	cmp = mpihelp_cmp(u->d, v->d, usize);
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-	if (u->sign)
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-		return -cmp;
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-	return cmp;
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+	if (!cmp)
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+		return 0;
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+	if ((cmp < 0?1:0) == (usign?1:0))
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+		return 1;
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+
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+	return -1;
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+}
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+
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+int mpi_cmp(MPI u, MPI v)
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+{
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+	return do_mpi_cmp(u, v, 0);
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 }
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 EXPORT_SYMBOL_GPL(mpi_cmp);
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+
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+int mpi_cmpabs(MPI u, MPI v)
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+{
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+	return do_mpi_cmp(u, v, 1);
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+}
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+EXPORT_SYMBOL_GPL(mpi_cmpabs);