mirror of https://gitee.com/openkylin/linux.git
877b5691f2
The flags field in 'struct shash_desc' never actually does anything. The only ostensibly supported flag is CRYPTO_TFM_REQ_MAY_SLEEP. However, no shash algorithm ever sleeps, making this flag a no-op. With this being the case, inevitably some users who can't sleep wrongly pass MAY_SLEEP. These would all need to be fixed if any shash algorithm actually started sleeping. For example, the shash_ahash_*() functions, which wrap a shash algorithm with the ahash API, pass through MAY_SLEEP from the ahash API to the shash API. However, the shash functions are called under kmap_atomic(), so actually they're assumed to never sleep. Even if it turns out that some users do need preemption points while hashing large buffers, we could easily provide a helper function crypto_shash_update_large() which divides the data into smaller chunks and calls crypto_shash_update() and cond_resched() for each chunk. It's not necessary to have a flag in 'struct shash_desc', nor is it necessary to make individual shash algorithms aware of this at all. Therefore, remove shash_desc::flags, and document that the crypto_shash_*() functions can be called from any context. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| asym_tpm.c | ||
| asymmetric_keys.h | ||
| asymmetric_type.c | ||
| mscode.asn1 | ||
| mscode_parser.c | ||
| pkcs7.asn1 | ||
| pkcs7_key_type.c | ||
| pkcs7_parser.c | ||
| pkcs7_parser.h | ||
| pkcs7_trust.c | ||
| pkcs7_verify.c | ||
| pkcs8.asn1 | ||
| pkcs8_parser.c | ||
| public_key.c | ||
| restrict.c | ||
| signature.c | ||
| tpm.asn1 | ||
| tpm_parser.c | ||
| verify_pefile.c | ||
| verify_pefile.h | ||
| x509.asn1 | ||
| x509_akid.asn1 | ||
| x509_cert_parser.c | ||
| x509_parser.h | ||
| x509_public_key.c | ||