lib/mpi: added comment on divide by 0 case

Comment explains that existing clients do not call this function with dsize == 0, which means that 1/0 should not happen. Signed-off-by: Dmitry Kasatkin <[email protected]> Reviewed-by: Tetsuo Handa <[email protected]> Signed-off-by: James Morris <[email protected]>
strager · Feb 1, 2012 · a6d68ec · a6d68ec
1 parent 4877e05
commit a6d68ec
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/mpi/mpih-div.c b/lib/mpi/mpih-div.c
@@ -217,6 +217,10 @@ mpihelp_divrem(mpi_ptr_t qp, mpi_size_t qextra_limbs,
 	case 0:
 		/* We are asked to divide by zero, so go ahead and do it!  (To make
 		   the compiler not remove this statement, return the value.)  */
+		/*
+		 * existing clients of this function have been modified
+		 * not to call it with dsize == 0, so this should not happen
+		 */
 		return 1 / dsize;
 
 	case 1: