From cd94c04c518fffbf7f2c173952d77414a5d6bb6b Mon Sep 17 00:00:00 2001 From: Alan Jenkins Date: Sat, 25 Oct 2008 15:51:19 +0100 Subject: udevd: avoid implicit memset in match_attr() Initializing a char array to "" is equivalent to a memset() call - which is exactly what it gets compiled to. Fixing this one callsite reduced memset() _user_ cpu cycles from 2-4% to 0.05% on the EeePC. Signed-off-by: Alan Jenkins --- udev/udev-rules.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/udev/udev-rules.c b/udev/udev-rules.c index 4df9eb35c8..44b26906b4 100644 --- a/udev/udev-rules.c +++ b/udev/udev-rules.c @@ -1794,10 +1794,11 @@ static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct char attr[UTIL_PATH_SIZE]; const char *key_name = &rules->buf[cur->key.attr_off]; const char *key_value = &rules->buf[cur->key.value_off]; - char value[UTIL_NAME_SIZE] = ""; + char value[UTIL_NAME_SIZE]; size_t len; util_strlcpy(attr, key_name, sizeof(attr)); + util_strlcpy(value, "", sizeof(value)); util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1); if (value[0] == '\0') { const char *val; -- cgit v1.2.3-54-g00ecf