eventfd-change-int-to-__u64-in-eventfd_signal-fix

update interface documentation

Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Sha Zhengju <handai.szj@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/eventfd.c b/fs/eventfd.c
index f570e7aa06d64b2e92a9cf63b61d8741347350fc..d81b9f654086d1cdb3899767cf6e1e5bf05e9f6e 100644 (file)
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -46,10 +46,8 @@ struct eventfd_ctx {
  * value, and we signal this as overflow condition by returining a POLLERR
  * to poll(2).
  *
- * Returns @n in case of success, a non-negative number lower than @n in case
- * of overflow, or the following error codes:
- *
- * -EINVAL    : The value of @n is negative.
+ * Returns the amount by which the counter was incrememnted.  This will be less
+ * than @n if the counter has overflowed.
  */
 __u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
 {