tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next head: dcae401d111324489c066aa57ed9c77b97b475f9 commit: 18c073719186a393b41715686cf95175c58919df [1046/1053] drm/amd: Closed hash table with low overhead config: i386-allyesconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout 18c073719186a393b41715686cf95175c58919df # save the attached .config to linux build tree make ARCH=i386

All warnings (new ones prefixed by >>):

drivers/gpu//drm/amd/lib/chash.c: In function 'chash_iter_relocate':

...

drivers/gpu//drm/amd/lib/chash.c:213:51: warning: self-comparison always evaluates to false [-Wtautological-compare]

BUG_ON(src.table->key_size != src.table->key_size); ^~ drivers/gpu//drm/amd/lib/chash.c:214:53: warning: self-comparison always evaluates to false [-Wtautological-compare] BUG_ON(src.table->value_size != src.table->value_size); ^~

vim +213 drivers/gpu//drm/amd/lib/chash.c

209 210 static void chash_iter_relocate(struct chash_iter dst, struct chash_iter src) 211 { 212 BUG_ON(src.table == dst.table && src.slot == dst.slot);

213 BUG_ON(src.table->key_size != src.table->key_size);

214 BUG_ON(src.table->value_size != src.table->value_size); 215 216 if (dst.table->key_size == 4) 217 dst.table->keys32[dst.slot] = src.table->keys32[src.slot]; 218 else 219 dst.table->keys64[dst.slot] = src.table->keys64[src.slot]; 220 221 if (dst.table->value_size) 222 memcpy(chash_iter_value(dst), chash_iter_value(src), 223 dst.table->value_size); 224 225 chash_iter_set_valid(dst); 226 chash_iter_set_invalid(src); 227

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