As Documentation/filesystems/sysfs.rst suggested, show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: zhangguopeng <zhangguopeng@xxxxxxxxxx> --- mm/memory-failure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 7194d6639720..fff849daceba 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -100,7 +100,7 @@ static ssize_t _name##_show(struct device *dev, \ { \ struct memory_failure_stats *mf_stats = \ &NODE_DATA(dev->id)->mf_stats; \ - return sprintf(buf, "%lu\n", mf_stats->_name); \ + return sysfs_emit(buf, "%lu\n", mf_stats->_name); \ } \ static DEVICE_ATTR_RO(_name) -- 2.25.1