On Thu, Jun 03, 2021 at 03:53:14AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 231bc539066760aaa44d46818c85b14ca2f56d9f > commit: 00c9211f60db2dead16856f81a3e6ab86b31f275 crypto: sa2ul - Fix DMA mapping API usage > date: 8 months ago > config: arm64-randconfig-r005-20210601 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d41cb6bb2607fa5c7a9df2b3dab361353657d225) > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # install arm64 cross compiling tool for clang build > # apt-get install binutils-aarch64-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=00c9211f60db2dead16856f81a3e6ab86b31f275 > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout 00c9211f60db2dead16856f81a3e6ab86b31f275 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > >> drivers/crypto/sa2ul.c:1674:6: warning: variable 'auth_len' set but not used [-Wunused-but-set-variable] > u16 auth_len; > ^ > 1 warning generated. Thanks for the report. This variable is indeed unused. ---8<--- This patch removes the unused auth_len variable from sa_aead_dma_in_callback. Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> diff --git a/drivers/crypto/sa2ul.c b/drivers/crypto/sa2ul.c index 51bb69bc573c..544d7040cfc5 100644 --- a/drivers/crypto/sa2ul.c +++ b/drivers/crypto/sa2ul.c @@ -1698,7 +1698,6 @@ static void sa_aead_dma_in_callback(void *data) size_t pl, ml; int i; int err = 0; - u16 auth_len; u32 *mdptr; sa_sync_from_device(rxd); @@ -1711,13 +1710,10 @@ static void sa_aead_dma_in_callback(void *data) for (i = 0; i < (authsize / 4); i++) mdptr[i + 4] = swab32(mdptr[i + 4]); - auth_len = req->assoclen + req->cryptlen; - if (rxd->enc) { scatterwalk_map_and_copy(&mdptr[4], req->dst, start, authsize, 1); } else { - auth_len -= authsize; start -= authsize; scatterwalk_map_and_copy(auth_tag, req->src, start, authsize, 0); -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
