From 8ccc869169d0c59d288b20ec2b060317f87e08b4 Mon Sep 17 00:00:00 2001 From: Kinglong Mee Date: Tue, 7 Feb 2017 21:50:32 +0800 Subject: [PATCH] sunrpc: use simple_read_from_buffer for reading cache flush Signed-off-by: Kinglong Mee Signed-off-by: Anna Schumaker --- net/sunrpc/cache.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 9e8561d1714d..2f06f510b570 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -1427,20 +1427,11 @@ static ssize_t read_flush(struct file *file, char __user *buf, struct cache_detail *cd) { char tbuf[22]; - unsigned long p = *ppos; size_t len; - snprintf(tbuf, sizeof(tbuf), "%lu\n", convert_to_wallclock(cd->flush_time)); - len = strlen(tbuf); - if (p >= len) - return 0; - len -= p; - if (len > count) - len = count; - if (copy_to_user(buf, (void*)(tbuf+p), len)) - return -EFAULT; - *ppos += len; - return len; + len = snprintf(tbuf, sizeof(tbuf), "%lu\n", + convert_to_wallclock(cd->flush_time)); + return simple_read_from_buffer(buf, count, ppos, tbuf, len); } static ssize_t write_flush(struct file *file, const char __user *buf, -- 2.30.2