Commit ea122be0 authored Mar 22, 2016 by Nicolai Stange Committed by Herbert Xu Apr 05, 2016

lib/mpi: mpi_write_sgl(): purge redundant pointer arithmetic



Within the copying loop in mpi_write_sgl(), we have

  if (lzeros) {
    ...
    p -= lzeros;
    y = lzeros;
  }
  p = p - (sizeof(alimb) - y);

If lzeros == 0, then y == 0, too. Thus, lzeros gets subtracted and added
back again to p.

Purge this redundancy.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 654842ef

lib/mpi/mpicoder.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -407,12 +407,11 @@ int mpi_write_to_sgl(MPI a, struct scatterlist sgl, unsigned nbytes,
		mpi_limb_t limb2 = (void )p - sizeof(alimb)
		+ lzeros;
		limb1 = limb2;
		p -= lzeros;
		y = lzeros;
		lzeros = 0;
		}

		p = p - (sizeof(alimb) - y);
		p = p - sizeof(alimb);

		for (x = 0; x < sizeof(alimb) - y; x++) {
		if (!buf_len) {