linux-kernel - [PATCH 1/1 linux-next] lib/mpi: use swap() in mpi

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Message-Id: <1434128359-10797-1-git-send-email-fabf@skynet.be>
Date:	Fri, 12 Jun 2015 18:59:18 +0200
From:	Fabian Frederick <fabf@...net.be>
To:	linux-kernel@...r.kernel.org
Cc:	Julia Lawall <Julia.Lawall@...6.fr>,
	Fabian Frederick <fabf@...net.be>
Subject: [PATCH 1/1 linux-next] lib/mpi: use swap() in mpi_powm()

Use kernel.h macro definition.

Thanks to Julia Lawall for Coccinelle scripting support.

Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 lib/mpi/mpi-pow.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/lib/mpi/mpi-pow.c b/lib/mpi/mpi-pow.c
index 5464c87..1acebfe 100644
--- a/lib/mpi/mpi-pow.c
+++ b/lib/mpi/mpi-pow.c
@@ -185,7 +185,6 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
 
 		for (;;) {
 			while (c) {
-				mpi_ptr_t tp;
 				mpi_size_t xsize;
 
 				/*if (mpihelp_mul_n(xp, rp, rp, rsize) < 0) goto enomem */
@@ -216,9 +215,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
 					xsize = msize;
 				}
 
-				tp = rp;
-				rp = xp;
-				xp = tp;
+				swap(rp, xp);
 				rsize = xsize;
 
 				if ((mpi_limb_signed_t) e < 0) {
@@ -244,9 +241,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
 						xsize = msize;
 					}
 
-					tp = rp;
-					rp = xp;
-					xp = tp;
+					swap(rp, xp);
 					rsize = xsize;
 				}
 				e <<= 1;
-- 
2.4.2

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