tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
crypto: scatterwalk - Add no-copy support to copychunks
The function ablkcipher_done_slow is pretty much identical to
scatterwalk_copychunks except that it doesn't actually copy as
the processing hasn't been completed yet.
This patch allows scatterwalk_copychunks to be used in this case
by specifying out == 2.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
+6
-4
+6
-4
crypto/scatterwalk.c
+6
-4
crypto/scatterwalk.c
···
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if (len_this_page > nbytes)
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len_this_page = nbytes;
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-
vaddr = scatterwalk_map(walk);
91
-
memcpy_dir(buf, vaddr, len_this_page, out);
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-
scatterwalk_unmap(vaddr);
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+
if (out != 2) {
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+
vaddr = scatterwalk_map(walk);
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+
memcpy_dir(buf, vaddr, len_this_page, out);
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+
scatterwalk_unmap(vaddr);
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+
}
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scatterwalk_advance(walk, len_this_page);
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···
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buf += len_this_page;
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nbytes -= len_this_page;
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-
scatterwalk_pagedone(walk, out, 1);
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+
scatterwalk_pagedone(walk, out & 1, 1);
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}
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}
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EXPORT_SYMBOL_GPL(scatterwalk_copychunks);