util/nvmutil: don't use xor swap

it doesn't save any time on modern systems, and it's just
confusing for some people to read. i mean, i understand it
instinctively, but normal people do it with a swap variable.

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index bbbb4e3f..7c0d0c31 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -464,9 +464,9 @@ swap(int partnum)
 
 	for (size_t w = NVM_SIZE * ((uint8_t *) &e)[0], x = 1;
 	    w < NVM_SIZE; w += 2, x += 2) {
+		uint8_t chg = n[w];
 		n[w] ^= n[x];
-		n[x] ^= n[w];
-		n[w] ^= n[x];
+		n[x] ^= chg;
 	}
 }