genirq: Remove unnecessary memset() calls
authorWeongyo Jeong <weongyo.linux@gmail.com>
Thu, 31 Mar 2016 19:15:03 +0000 (12:15 -0700)
committerThomas Gleixner <tglx@linutronix.de>
Fri, 10 Jun 2016 15:07:50 +0000 (17:07 +0200)
sprintf() and snprintf() implementation of kernel guarantees that
its result is terminated with null byte if size is larger than 0. So we
don't need to call memset() at all.

Signed-off-by: Weongyo Jeong <weongyo.linux@gmail.com>
Link: http://lkml.kernel.org/r/1459451703-5744-1-git-send-email-weongyo.linux@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/irq/proc.c

index 50a8f28be247ffeab1612a35f3263b137174c6c5..f30425dce9ddcdc6fc849c2c3d16cb578a9674e0 100644 (file)
@@ -311,7 +311,6 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
                                        !name_unique(irq, action))
                return;
 
-       memset(name, 0, MAX_NAMELEN);
        snprintf(name, MAX_NAMELEN, "%s", action->name);
 
        /* create /proc/irq/1234/handler/ */
@@ -340,7 +339,6 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
        if (desc->dir)
                goto out_unlock;
 
-       memset(name, 0, MAX_NAMELEN);
        sprintf(name, "%d", irq);
 
        /* create /proc/irq/1234 */
@@ -386,7 +384,6 @@ void unregister_irq_proc(unsigned int irq, struct irq_desc *desc)
 #endif
        remove_proc_entry("spurious", desc->dir);
 
-       memset(name, 0, MAX_NAMELEN);
        sprintf(name, "%u", irq);
        remove_proc_entry(name, root_irq_dir);
 }