X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..a39ff7e25e19b3a8c3020042a3872ca9ec9659f1:/bsd/kern/tty_subr.c?ds=sidebyside

diff --git a/bsd/kern/tty_subr.c b/bsd/kern/tty_subr.c
index c2abc010d..bfac6579b 100644
--- a/bsd/kern/tty_subr.c
+++ b/bsd/kern/tty_subr.c
@@ -203,8 +203,8 @@ int
 ndqb(struct clist *clp, int flag)
 {
 	int count = 0;
-	register int i;
-	register int cc;
+	int i;
+	int cc;
 
 	if ((cc = clp->c_cc) == 0)
 		goto out;
@@ -271,7 +271,7 @@ ndflush(struct clist *clp, int count)
 int
 putc(int c, struct clist *clp)
 {
-	register int i;
+	int i;
 
 	if (clp->c_cc == 0) {
 		if (!clp->c_cs) {
@@ -320,7 +320,7 @@ void
 clrbits(u_char *cp, int off, int len)
 {
 	int sby, sbi, eby, ebi;
-	register int i;
+	int i;
 	u_char mask;
 
 	if(len==1) {
@@ -340,7 +340,9 @@ clrbits(u_char *cp, int off, int len)
 		cp[sby++] &= mask;
 
 		mask = (1<<ebi) - 1;
-		cp[eby] &= ~mask;
+		/* handle remainder bits, if any, for a non-0 ebi value */
+		if (mask)
+			cp[eby] &= ~mask;
 
 		for (i = sby; i < eby; i++)
 			cp[i] = 0x00;