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new helper: copy_to_iter_full()

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... and convert copy_linear_skb() to using that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2024-04-07 02:42:36 -04:00
parent 39cd87c4eb
commit e82051193a
2 changed files with 11 additions and 8 deletions
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10
include/linux/uio.h
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@@ -205,6 +205,16 @@ size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)
return 0;
}
static __always_inline __must_check
bool copy_to_iter_full(const void *addr, size_t bytes, struct iov_iter *i)
{
size_t copied = copy_to_iter(addr, bytes, i);
if (likely(copied == bytes))
return true;
iov_iter_revert(i, copied);
return false;
}
static __always_inline __must_check
bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)
{