treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain()

All callers pass chain=0 to scatterwalk_crypto_chain().

Remove this unneeded parameter.

Signed-off-by: Eric Biggers <e

crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain()

All callers pass chain=0 to scatterwalk_crypto_chain().

Remove this unneeded parameter.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Remove unnecessary aliasing check in map_and_copy

The aliasing check in map_and_copy is no longer necessary because
the IPsec ESP code no longer provides an IV that points into

crypto: scatterwalk - Remove unnecessary aliasing check in map_and_copy

The aliasing check in map_and_copy is no longer necessary because
the IPsec ESP code no longer provides an IV that points into the
actual request data. As this check is now triggering BUG checks
due to the vmalloced stack code, I'm removing it.

Reported-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Inline start/map/done

This patch inlines the functions scatterwalk_start, scatterwalk_map
and scatterwalk_done as they're all tiny and mostly used by the block
cipher walker.

crypto: scatterwalk - Inline start/map/done

This patch inlines the functions scatterwalk_start, scatterwalk_map
and scatterwalk_done as they're all tiny and mostly used by the block
cipher walker.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start

Nothing bad will happen even if sg->length is zero, so there is
no point in keeping this BUG_ON in scatterwalk_start.

Signed-off-by

crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start

Nothing bad will happen even if sg->length is zero, so there is
no point in keeping this BUG_ON in scatterwalk_start.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Remove unnecessary advance in scatterwalk_pagedone

The offset advance in scatterwalk_pagedone not only is unnecessary,
but it was also buggy when it was needed by scatterwalk_c

crypto: scatterwalk - Remove unnecessary advance in scatterwalk_pagedone

The offset advance in scatterwalk_pagedone not only is unnecessary,
but it was also buggy when it was needed by scatterwalk_copychunks.
As the latter has long ago been fixed to call scatterwalk_advance
directly, we can remove this unnecessary offset adjustment.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Fix test in scatterwalk_done

When there is more data to be processed, the current test in
scatterwalk_done may prevent us from calling pagedone even when
we should.

In particu

crypto: scatterwalk - Fix test in scatterwalk_done

When there is more data to be processed, the current test in
scatterwalk_done may prevent us from calling pagedone even when
we should.

In particular, if we're on an SG entry spanning multiple pages
where the last page is not a full page, we will incorrectly skip
calling pagedone on the second last page.

This patch fixes this by adding a separate test for whether we've
reached the end of a page.

Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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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 ha

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>

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crypto: scatterwalk - Remove scatterwalk_bytes_sglen

This patch removes the now unused scatterwalk_bytes_sglen. Anyone
using this out-of-tree should switch over to sg_nents_for_len.

Signed-off-by:

crypto: scatterwalk - Remove scatterwalk_bytes_sglen

This patch removes the now unused scatterwalk_bytes_sglen. Anyone
using this out-of-tree should switch over to sg_nents_for_len.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Hide PageSlab call to optimise away flush_dcache_page

On architectures where flush_dcache_page is not needed, we will
end up generating all the code up to the PageSlab call. T

crypto: scatterwalk - Hide PageSlab call to optimise away flush_dcache_page

On architectures where flush_dcache_page is not needed, we will
end up generating all the code up to the PageSlab call. This is
because PageSlab operates on a volatile pointer and thus cannot
be optimised away.

This patch works around this by checking whether flush_dcache_page
is needed before we call PageSlab which then allows PageSlab to be
compiled awy.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Add missing sg_init_table to scatterwalk_ffwd

We need to call sg_init_table as otherwise the first entry may
inadvertently become the last.

Signed-off-by: Herbert Xu <herbert@

crypto: scatterwalk - Add missing sg_init_table to scatterwalk_ffwd

We need to call sg_init_table as otherwise the first entry may
inadvertently become the last.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Check for same address in map_and_copy

This patch adds a check for in scatterwalk_map_and_copy to avoid
copying from the same address to the same address. This is going
to be

crypto: scatterwalk - Check for same address in map_and_copy

This patch adds a check for in scatterwalk_map_and_copy to avoid
copying from the same address to the same address. This is going
to be used for IV copying in AEAD IV generators.

There is no provision for partial overlaps.

This patch also uses the new scatterwalk_ffwd instead of doing
it by hand in scatterwalk_map_and_copy.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Add scatterwalk_ffwd helper

This patch adds the scatterwalk_ffwd helper which can create an
SG list that starts in the middle of an existing SG list. The
new list may either b

crypto: scatterwalk - Add scatterwalk_ffwd helper

This patch adds the scatterwalk_ffwd helper which can create an
SG list that starts in the middle of an existing SG list. The
new list may either be part of the existing list or be a chain
that latches onto part of the existing list.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: replace scatterwalk_sg_next with sg_next

Modify crypto drivers to use the generic SG helper since
both of them are equivalent and the one from crypto is redundant.

See also:
468577abe37ff

crypto: replace scatterwalk_sg_next with sg_next

Modify crypto drivers to use the generic SG helper since
both of them are equivalent and the one from crypto is redundant.

See also:
468577abe37ff7b453a9ac613e0ea155349203ae reverted in
b2ab4a57b018aafbba35bff088218f5cc3d2142e

Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Add support for calculating number of SG elements

Crypto layer only passes nbytes to encrypt but in omap-aes driver we need to
know number of SG elements to pass to dmaengine s

crypto: scatterwalk - Add support for calculating number of SG elements

Crypto layer only passes nbytes to encrypt but in omap-aes driver we need to
know number of SG elements to pass to dmaengine slave API. We add function for
the same to scatterwalk library.

Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>

crypto: scatterwalk - Fix scatterwalk_done() test

We are done with the scattergather entry when the walk offset goes
past sg->offset + sg->length, not when it crosses a page boundary.

There is a si

crypto: scatterwalk - Fix scatterwalk_done() test

We are done with the scattergather entry when the walk offset goes
past sg->offset + sg->length, not when it crosses a page boundary.

There is a similarly queer test in the second half of
scatterwalk_pagedone() that probably needs some scrutiny.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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crypto: scatterwalk - Avoid flush_dcache_page on slab pages

It's illegal to call flush_dcache_page on slab pages on a number
of architectures. So this patch avoids doing so if PageSlab is
true.

In

crypto: scatterwalk - Avoid flush_dcache_page on slab pages

It's illegal to call flush_dcache_page on slab pages on a number
of architectures. So this patch avoids doing so if PageSlab is
true.

In future we can move the flush_dcache_page call to those page
cache users that actually need it.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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[CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy

It's better to return silently than crash and burn when someone feeds us
a zero length. In particular the null digest algorithm

[CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy

It's better to return silently than crash and burn when someone feeds us
a zero length. In particular the null digest algorithm when used as part
of authenc will do that to us.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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[CRYPTO] scatterwalk: Restore custom sg chaining for now

Unfortunately the generic chaining hasn't been ported to all architectures
yet, and notably not s390. So this patch restores the chainging t

[CRYPTO] scatterwalk: Restore custom sg chaining for now

Unfortunately the generic chaining hasn't been ported to all architectures
yet, and notably not s390. So this patch restores the chainging that we've
been using previously which does work everywhere.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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[CRYPTO] scatterwalk: Move scatterwalk.h to linux/crypto

The scatterwalk infrastructure is used by algorithms so it needs to
move out of crypto for future users that may live in drivers/crypto
or as

[CRYPTO] scatterwalk: Move scatterwalk.h to linux/crypto

The scatterwalk infrastructure is used by algorithms so it needs to
move out of crypto for future users that may live in drivers/crypto
or asm/*/crypto.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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[CRYPTO] scatterwalk: Use generic scatterlist chaining

This patch converts the crypto scatterwalk code to use the generic
scatterlist chaining rather the version specific to crypto.

Signed-off-by:

[CRYPTO] scatterwalk: Use generic scatterlist chaining

This patch converts the crypto scatterwalk code to use the generic
scatterlist chaining rather the version specific to crypto.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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[SG] Update crypto/ to sg helpers

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

crypto: don't pollute the global namespace with sg_next()

It's a subsystem function, prefix it as such.

Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jens Axboe <jens.axboe@orac

crypto: don't pollute the global namespace with sg_next()

It's a subsystem function, prefix it as such.

Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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[CRYPTO] api: Kill crypto_km_types

When scatterwalk is built as a module digest.c was broken because it
requires the crypto_km_types structure which is in scatterwalk. This
patch removes the crypto

[CRYPTO] api: Kill crypto_km_types

When scatterwalk is built as a module digest.c was broken because it
requires the crypto_km_types structure which is in scatterwalk. This
patch removes the crypto_km_types structure by encoding the logic into
crypto_kmap_type directly.

In fact, this even saves a few bytes of code (not to mention the data
structure itself) on i386 which is about the only place where it's
needed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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