locking: Move the semaphore core to kernel/locking/

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / backing-dev.c

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 37d9edc..ce682f7 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -652,7 +652,7 @@ int pdflush_proc_obsolete(struct ctl_table *table, int write,
 {
        char kbuf[] = "0\n";
 
-       if (*ppos) {
+       if (*ppos || *lenp < sizeof(kbuf)) {
                *lenp = 0;
                return 0;
        }