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* crypto: aes - Precompute tablesHerbert Xu2008-12-24
| | | | | | | | | | | The tables used by the various AES algorithms are currently computed at run-time. This has created an init ordering problem because some AES algorithms may be registered before the tables have been initialised. This patch gets around this whole thing by precomputing the tables. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: talitos - Ack done interrupt in isr instead of taskletLee Nipper2008-12-24
| | | | | | | | | | | | | | Previous commit for interrupt mitigation moved the done interrupt acknowlegement from the isr to the talitos_done tasklet. This patch moves the done interrupt acknowledgement back into the isr so that done interrupts will always be acknowledged. This covers the case for acknowledging interrupts for channel done processing that has actually already been completed by the tasklet prior to fielding a pending interrupt. Signed-off-by: Lee Nipper <lee.nipper@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: testmgr - Correct comment about deflate parametersGeert Uytterhoeven2008-12-24
| | | | | | | | | | The comment for the deflate test vectors says the winbits parameter is 11, while the deflate module actually uses -11 (a negative window bits parameter enables the raw deflate format instead of the zlib format). Correct this, to avoid confusion about the format used. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: salsa20 - Remove private wrappers around various operationsHarvey Harrison2008-12-24
| | | | | | | | | ROTATE -> rol32 XOR was always used with the same destination, use ^= PLUS/PLUSONE use ++ or += Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: des3_ede - permit weak keys unless REQ_WEAK_KEY setJarod Wilson2008-12-24
| | | | | | | | | | | | | | | | | While its a slightly insane to bypass the key1 == key2 || key2 == key3 check in triple-des, since it reduces it to the same strength as des, some folks do need to do this from time to time for backwards compatibility with des. My own case is FIPS CAVS test vectors. Many triple-des test vectors use a single key, replicated 3x. In order to get the expected results, des3_ede_setkey() needs to only reject weak keys if the CRYPTO_TFM_REQ_WEAK_KEY flag is set. Also sets a more appropriate RES flag when a weak key is found. Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: sha512 - Switch to shash Adrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes sha512 and sha384 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: sha512 - Move message schedule W[80] to static percpu areaAdrian-Ken Rueegsegger2008-12-24
| | | | | | | | | The message schedule W (u64[80]) is too big for the stack. In order for this algorithm to be used with shash it is moved to a static percpu area. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: michael_mic - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes michael_mic to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: wp512 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes wp512, wp384 and wp256 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: tgr192 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes tgr192, tgr160 and tgr128 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: sha256 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes sha256 and sha224 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: md5 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes md5 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: md4 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes md4 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: sha1 - Switch to shashAdrian-Ken Rueegsegger2008-12-24
| | | | | | | This patch changes sha1 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rmd320 - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes rmd320 to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rmd256 - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes rmd256 to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rmd160 - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes rmd160 to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: rmd128 - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes rmd128 to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: null - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes digest_null to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hash - Make setkey optionalHerbert Xu2008-12-24
| | | | | | | Since most cryptographic hash algorithms have no keys, this patch makes the setkey function optional for ahash and shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: testmgr - Validate output length in (de)compression testsGeert Uytterhoeven2008-12-24
| | | | | | | | | | | When self-testing (de)compression algorithms, make sure the actual size of the (de)compressed output data matches the expected output size. Otherwise, in case the actual output size would be smaller than the expected output size, the subsequent buffer compare test would still succeed, and no error would be reported. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: remove uses of __constant_{endian} helpersHarvey Harrison2008-12-24
| | | | | | | Base versions handle constant folding just fine. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: testmgr - Fix error flow of test_compIngo Molnar2008-12-24
| | | | | | | | | | | | | | | | | This warning: crypto/testmgr.c: In function ‘test_comp’: crypto/testmgr.c:829: warning: ‘ret’ may be used uninitialized in this function triggers because GCC correctly notices that in the ctcount == 0 && dtcount != 0 input condition case this function can return an undefined value, if the second loop fails. Remove the shadowed 'ret' variable from the second loop that was probably unintended. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Use softirq kernel mapping in bh contextEvgeniy Polyakov2008-12-24
| | | | | | | | Use KM_SOFTIRQ instead of KM_IRQ in tasklet context. Added bug_on on input no-page condition. Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Fix queue managementEvgeniy Polyakov2008-12-24
| | | | | | | | | Fix queue management. Change ring size and perform its check not one after another descriptor, but using stored pointers to the last checked descriptors. Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Remove some unused cruftPatrick McHardy2008-12-24
| | | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Fix queue processingPatrick McHardy2008-12-24
| | | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Fix request context corruptionPatrick McHardy2008-12-24
| | | | | | | | | | | HIFN uses the transform context to store per-request data, which breaks when more than one request is outstanding. Move per request members from struct hifn_context to a new struct hifn_request_context and convert the code to use this. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Don't copy src sg listPatrick McHardy2008-12-24
| | | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hifn_795x - Fix DMA setupPatrick McHardy2008-12-24
| | | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ansi_cprng - fix inverted DT increment routineJarod Wilson2008-12-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ANSI X9.31 PRNG docs aren't particularly clear on how to increment DT, but empirical testing shows we're incrementing from the wrong end. A 10,000 iteration Monte Carlo RNG test currently winds up not getting the expected result. From http://csrc.nist.gov/groups/STM/cavp/documents/rng/RNGVS.pdf : # CAVS 4.3 # ANSI931 MCT [X9.31] [AES 128-Key] COUNT = 0 Key = 9f5b51200bf334b5d82be8c37255c848 DT = 6376bbe52902ba3b67c925fa701f11ac V = 572c8e76872647977e74fbddc49501d1 R = 48e9bd0d06ee18fbe45790d5c3fc9b73 Currently, we get 0dd08496c4f7178bfa70a2161a79459a after 10000 loops. Inverting the DT increment routine results in us obtaining the expected result of 48e9bd0d06ee18fbe45790d5c3fc9b73. Verified on both x86_64 and ppc64. Signed-off-by: Jarod Wilson <jarod@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* libcrc32c: Select CRYPTO in KconfigHerbert Xu2008-12-24
| | | | | | | Selecting CRYPTO_CRC32C is not enough as CRYPTO which CRYPTO_CRC32C depends on may be disabled. This patch adds the select on CRYPTO. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ansi_cprng - Avoid incorrect extra call to _get_more_prng_bytesJarod Wilson2008-12-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While working with some FIPS RNGVS test vectors yesterday, I discovered a little bug in the way the ansi_cprng code works right now. For example, the following test vector (complete with expected result) from http://csrc.nist.gov/groups/STM/cavp/documents/rng/RNGVS.pdf ... Key = f3b1666d13607242ed061cabb8d46202 DT = e6b3be782a23fa62d71d4afbb0e922fc V = f0000000000000000000000000000000 R = 88dda456302423e5f69da57e7b95c73a ...when run through ansi_cprng, yields an incorrect R value of e2afe0d794120103d6e86a2b503bdfaa. If I load up ansi_cprng w/dbg=1 though, it was fairly obvious what was going wrong: ----8<---- getting 16 random bytes for context ffff810033fb2b10 Calling _get_more_prng_bytes for context ffff810033fb2b10 Input DT: 00000000: e6 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc Input I: 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Input V: 00000000: f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 tmp stage 0: 00000000: e6 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc tmp stage 1: 00000000: f4 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 tmp stage 2: 00000000: 8c 53 6f 73 a4 1a af d4 20 89 68 f4 58 64 f8 be Returning new block for context ffff810033fb2b10 Output DT: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc Output I: 00000000: 04 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 Output V: 00000000: 48 89 3b 71 bc e4 00 b6 5e 21 ba 37 8a 0a d5 70 New Random Data: 00000000: 88 dd a4 56 30 24 23 e5 f6 9d a5 7e 7b 95 c7 3a Calling _get_more_prng_bytes for context ffff810033fb2b10 Input DT: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc Input I: 00000000: 04 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 Input V: 00000000: 48 89 3b 71 bc e4 00 b6 5e 21 ba 37 8a 0a d5 70 tmp stage 0: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc tmp stage 1: 00000000: 80 6b 3a 8c 23 ae 8f 53 be 71 4c 16 fc 13 b2 ea tmp stage 2: 00000000: 2a 4d e1 2a 0b 58 8e e6 36 b8 9c 0a 26 22 b8 30 Returning new block for context ffff810033fb2b10 Output DT: 00000000: e8 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc Output I: 00000000: c8 e2 01 fd 9f 4a 8f e5 e0 50 f6 21 76 19 67 9a Output V: 00000000: ba 98 e3 75 c0 1b 81 8d 03 d6 f8 e2 0c c6 54 4b New Random Data: 00000000: e2 af e0 d7 94 12 01 03 d6 e8 6a 2b 50 3b df aa returning 16 from get_prng_bytes in context ffff810033fb2b10 ----8<---- The expected result is there, in the first "New Random Data", but we're incorrectly making a second call to _get_more_prng_bytes, due to some checks that are slightly off, which resulted in our original bytes never being returned anywhere. One approach to fixing this would be to alter some byte_count checks in get_prng_bytes, but it would mean the last DEFAULT_BLK_SZ bytes would be copied a byte at a time, rather than in a single memcpy, so a slightly more involved, equally functional, and ultimately more efficient way of fixing this was suggested to me by Neil, which I'm submitting here. All of the RNGVS ANSI X9.31 AES128 VST test vectors I've passed through ansi_cprng are now returning the expected results with this change. Signed-off-by: Jarod Wilson <jarod@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: md4 - Use ARRAY_SIZEJulia Lawall2008-12-24
| | | | | | | | | | | | | | | | | | | | | | | | | | ARRAY_SIZE is more concise to use when the size of an array is divided by the size of its type or the size of its first element. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @i@ @@ #include <linux/kernel.h> @depends on i using "paren.iso"@ type T; T[] E; @@ - (sizeof(E)/sizeof(T)) + ARRAY_SIZE(E) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* libcrc32c: Add crc32c_le macroHerbert Xu2008-12-24
| | | | | | | The bnx2x driver actually uses the crc32c_le name so this patch restores the crc32c_le symbol through a macro. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* libcrc32c: Fix "crc32c undefined" compilation errorAdrian-Ken Rueegsegger2008-12-24
| | | | | | | | | | | | | | | | The latest shash changes leave crc32c undefined: [...] Building modules, stage 2. MODPOST 1381 modules ERROR: "crc32c" [net/sctp/sctp.ko] undefined! ERROR: "crc32c" [net/ipv4/netfilter/nf_nat_proto_sctp.ko] undefined! Adding EXPORT_SYMBOL(crc32c) to lib/libcrc32c.c fixes the compile error. This patch has been compile-tested only. Signed-off-by: Adrian-Ken Rueegsegger <rueegsegger@swiss-it.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* libcrc32c: Move implementation to crypto crc32cHerbert Xu2008-12-24
| | | | | | | | | | | | | | This patch swaps the role of libcrc32c and crc32c. Previously the implementation was in libcrc32c and crc32c was a wrapper. Now the code is in crc32c and libcrc32c just calls the crypto layer. The reason for the change is to tap into the algorithm selection capability of the crypto API so that optimised implementations such as the one utilising Intel's CRC32C instruction can be used where available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: crc32c - Test descriptor context formatHerbert Xu2008-12-24
| | | | | | | | This patch adds a test for the requirement that all crc32c algorithms shall store the partial result in the first four bytes of the descriptor context. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: crc32c-intel - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes crc32c-intel to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: crc32c - Switch to shashHerbert Xu2008-12-24
| | | | | | This patch changes crc32c to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hash - Export shash through hashHerbert Xu2008-12-24
| | | | | | | | This patch allows shash algorithms to be used through the old hash interface. This is a transitional measure so we can convert the underlying algorithms to shash before converting the users across. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: api - Call type show function before legacy for procHerbert Xu2008-12-24
| | | | | | | | | | This patch makes /proc/crypto call the type-specific show function if one is present before calling the legacy show functions for cipher/digest/compress. This allows us to reuse the type values for those legacy types. In particular, hash and digest will share one type value while shash is phased in as the default hash type. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hash - Add import/export interfaceHerbert Xu2008-12-24
| | | | | | | | | | | | It is often useful to save the partial state of a hash function so that it can be used as a base for two or more computations. The most prominent example is HMAC where all hashes start from a base determined by the key. Having an import/export interface means that we only have to compute that base once rather than for each message. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hash - Export shash through ahashHerbert Xu2008-12-24
| | | | | | | | This patch allows shash algorithms to be used through the ahash interface. This is required before we can convert digest algorithms over to shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: hash - Add shash interfaceHerbert Xu2008-12-24
| | | | | | | | | | | | | | | | | | | | | | | | The shash interface replaces the current synchronous hash interface. It improves over hash in two ways. Firstly shash is reentrant, meaning that the same tfm may be used by two threads simultaneously as all hashing state is stored in a local descriptor. The other enhancement is that shash no longer takes scatter list entries. This is because shash is specifically designed for synchronous algorithms and as such scatter lists are unnecessary. All existing hash users will be converted to shash once the algorithms have been completely converted. There is also a new finup function that combines update with final. This will be extended to ahash once the algorithm conversion is done. This is also the first time that an algorithm type has their own registration function. Existing algorithm types will be converted to this way in due course. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: api - Rebirth of crypto_alloc_tfmHerbert Xu2008-12-24
| | | | | | | | | | | | | | | This patch reintroduces a completely revamped crypto_alloc_tfm. The biggest change is that we now take two crypto_type objects when allocating a tfm, a frontend and a backend. In fact this simply formalises what we've been doing behind the API's back. For example, as it stands crypto_alloc_ahash may use an actual ahash algorithm or a crypto_hash algorithm. Putting this in the API allows us to do this much more cleanly. The existing types will be converted across gradually. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: api - Move type exit function into crypto_tfmHerbert Xu2008-12-24
| | | | | | | | | | | | | | | | | | | | | | | The type exit function needs to undo any allocations done by the type init function. However, the type init function may differ depending on the upper-level type of the transform (e.g., a crypto_blkcipher instantiated as a crypto_ablkcipher). So we need to move the exit function out of the lower-level structure and into crypto_tfm itself. As it stands this is a no-op since nobody uses exit functions at all. However, all cases where a lower-level type is instantiated as a different upper-level type (such as blkcipher as ablkcipher) will be converted such that they allocate the underlying transform and use that instead of casting (e.g., crypto_ablkcipher casted into crypto_blkcipher). That will need to use a different exit function depending on the upper-level type. This patch also allows the type init/exit functions to call (or not) cra_init/cra_exit instead of always calling them from the top level. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ansi_cprng - Allow resetting of DT valueNeil Horman2008-12-24
| | | | | | | | | | | | | | This is a patch that was sent to me by Jarod Wilson, marking off my outstanding todo to allow the ansi cprng to set/reset the DT counter value in a cprng instance. Currently crytpo_rng_reset accepts a seed byte array which is interpreted by the ansi_cprng as a {V key} tuple. This patch extends that tuple to now be {V key DT}, with DT an optional value during reset. This patch also fixes a bug we noticed in which the offset of the key area of the seed is started at DEFAULT_PRNG_KSZ rather than DEFAULT_BLK_SZ as it should be. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: padlock - Avoid resetting cword on successive operationsHerbert Xu2008-12-24
| | | | | | | | | | | | | | | | | | | Resetting the control word is quite expensive. Fortunately this isn't an issue for the common operations such as CBC and ECB as the whole operation is done through a single call. However, modes such as LRW and XTS have to call padlock over and over again for one operation which really hurts if each call resets the control word. This patch uses an idea by Sebastian Siewior to store the last control word used on a CPU and only reset the control word if that changes. Note that any task switch automatically resets the control word so we only need to be accurate with regard to the stored control word when no task switches occur. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: crc32c-intel - Update copyright headKent Liu2008-12-24
| | | | | | | | The original copyright head for crc32c-intel.c is incorrect. Please merge the patch to update it. Signed-Off-By: Kent Liu <kent.liu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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