X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Feventfd.c;h=d81b9f654086d1cdb3899767cf6e1e5bf05e9f6e;hb=2a1497c3c4e884d6886e13741d0ba1abd2631006;hp=dba15fecf23e376f12ad2cb367424cf202d3a819;hpb=1e20932a23578bb1ec59107843574e259b96193f;p=karo-tx-linux.git

diff --git a/fs/eventfd.c b/fs/eventfd.c
index dba15fecf23e..d81b9f654086 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -46,20 +46,16 @@ 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.
  */
-int eventfd_signal(struct eventfd_ctx *ctx, int n)
+__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
 {
 	unsigned long flags;
 
-	if (n < 0)
-		return -EINVAL;
 	spin_lock_irqsave(&ctx->wqh.lock, flags);
 	if (ULLONG_MAX - ctx->count < n)
-		n = (int) (ULLONG_MAX - ctx->count);
+		n = ULLONG_MAX - ctx->count;
 	ctx->count += n;
 	if (waitqueue_active(&ctx->wqh))
 		wake_up_locked_poll(&ctx->wqh, POLLIN);