* [PATCH] fs/userfaultfd: No need for gotos
@ 2020-06-06 15:02 Pavel Machek
0 siblings, 0 replies; only message in thread
From: Pavel Machek @ 2020-06-06 15:02 UTC (permalink / raw)
To: viro, linux-fsdevel, kernel list, trivial
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No need for gotos when all the target does is return. In this case it
also avoids redundant variable assignments.
Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index e39fdec8a0b0..860db4fd28dc 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1883,12 +1883,10 @@ static int userfaultfd_api(struct userfaultfd_ctx *ctx,
int ret;
__u64 features;
- ret = -EINVAL;
if (ctx->state != UFFD_STATE_WAIT_API)
- goto out;
- ret = -EFAULT;
+ return -EINVAL;
if (copy_from_user(&uffdio_api, buf, sizeof(uffdio_api)))
- goto out;
+ return -EFAULT;
features = uffdio_api.features;
ret = -EINVAL;
if (uffdio_api.api != UFFD_API || (features & ~UFFD_API_FEATURES))
@@ -1899,20 +1897,18 @@ static int userfaultfd_api(struct userfaultfd_ctx *ctx,
/* report all available features and ioctls to userland */
uffdio_api.features = UFFD_API_FEATURES;
uffdio_api.ioctls = UFFD_API_IOCTLS;
- ret = -EFAULT;
if (copy_to_user(buf, &uffdio_api, sizeof(uffdio_api)))
- goto out;
+ return -EFAULT;
ctx->state = UFFD_STATE_RUNNING;
/* only enable the requested features for this uffd context */
ctx->features = uffd_ctx_features(features);
- ret = 0;
-out:
- return ret;
+ return 0;
+
err_out:
memset(&uffdio_api, 0, sizeof(uffdio_api));
if (copy_to_user(buf, &uffdio_api, sizeof(uffdio_api)))
- ret = -EFAULT;
- goto out;
+ return -EFAULT;
+ return ret;
}
static long userfaultfd_ioctl(struct file *file, unsigned cmd,
--
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2020-06-06 15:02 [PATCH] fs/userfaultfd: No need for gotos Pavel Machek
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