Remove do-nothing code that was required to dirty the old buffer on Alpha.

Coverity ID:	838
Approved by:	jhb, alc

1 files changed, 1 insertions, 12 deletions

diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 0a8a096..d65041a 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1373,8 +1373,7 @@ int
 sysctl_wire_old_buffer(struct sysctl_req *req, size_t len)
 {
 	int ret;
-	size_t i, wiredlen;
-	char *cp, dummy;
+	size_t wiredlen;
 
 	wiredlen = (len > 0 && len < req->oldlen) ? len : req->oldlen;
 	ret = 0;
@@ -1387,16 +1386,6 @@ sysctl_wire_old_buffer(struct sysctl_req *req, size_t len)
 					return (ret);
 				wiredlen = 0;
 			}
-			/*
-			 * Touch all the wired pages to avoid PTE modified
-			 * bit emulation traps on Alpha while holding locks
-			 * in the sysctl handler.
-			 */
-			for (i = (wiredlen + PAGE_SIZE - 1) / PAGE_SIZE,
-			    cp = req->oldptr; i > 0; i--, cp += PAGE_SIZE) {
-				copyin(cp, &dummy, 1);
-				copyout(&dummy, cp, 1);
-			}
 		}
 		req->lock = REQ_WIRED;
 		req->validlen = wiredlen;