From: Andrew Morton <akpm@linux-foundation.org>

uaccess functions already do that.

Cc: Matt Mackall <mpm@selenic.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Adrian Bunk <bunk@stusta.de>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/proc_misc.c |    3 ---
 1 file changed, 3 deletions(-)

diff -puN fs/proc/proc_misc.c~maps4-add-proc-kpagecount-interface-fix fs/proc/proc_misc.c
--- a/fs/proc/proc_misc.c~maps4-add-proc-kpagecount-interface-fix
+++ a/fs/proc/proc_misc.c
@@ -693,9 +693,6 @@ static ssize_t kpagecount_read(struct fi
 	ssize_t ret = 0;
 	u64 pcount;
 
-	if (!access_ok(VERIFY_WRITE, buf, count))
-		return -EFAULT;
-
 	pfn = src / KPMSIZE;
 	count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
 	if (src & KPMMASK || count & KPMMASK)
_