iov_iter: Fix build error without CONFIG_CRYPTO
If CONFIG_CRYPTO is not set or set to m,
gcc building warn this:
lib/iov_iter.o: In function `hash_and_copy_to_iter':
iov_iter.c:(.text+0x9129): undefined reference to `crypto_stats_get'
iov_iter.c:(.text+0x9152): undefined reference to `crypto_stats_ahash_update'
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: d05f443554
("iov_iter: introduce hash_and_copy_to_iter helper")
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -1528,6 +1528,7 @@ EXPORT_SYMBOL(csum_and_copy_to_iter);
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size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp,
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struct iov_iter *i)
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{
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#ifdef CONFIG_CRYPTO
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struct ahash_request *hash = hashp;
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struct scatterlist sg;
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size_t copied;
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@ -1537,6 +1538,9 @@ size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp,
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ahash_request_set_crypt(hash, &sg, NULL, copied);
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crypto_ahash_update(hash);
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return copied;
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#else
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return 0;
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#endif
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}
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EXPORT_SYMBOL(hash_and_copy_to_iter);
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