linux-stable/fs/f2fs
Eric Biggers 877b5691f2 crypto: shash - remove shash_desc::flags
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>
2019-04-25 15:38:12 +08:00
..
acl.c f2fs: use kvmalloc, if kmalloc is failed 2018-12-26 15:16:53 -08:00
acl.h f2fs: add SPDX license identifiers 2018-09-12 13:07:10 -07:00
checkpoint.c f2fs: fix to add refcount once page is tagged PG_private 2019-03-12 18:59:19 -07:00
data.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
debug.c f2fs: no need to check return value of debugfs_create functions 2019-01-22 14:25:25 +01:00
dir.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
extent_cache.c f2fs: fix to initialize variable to avoid UBSAN/smatch warning 2019-01-22 15:31:26 -08:00
f2fs.h crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
file.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
gc.c f2fs: check PageWriteback flag for ordered case 2018-12-26 15:16:56 -08:00
gc.h f2fs: add SPDX license identifiers 2018-09-12 13:07:10 -07:00
hash.c f2fs: add SPDX license identifiers 2018-09-12 13:07:10 -07:00
inline.c f2fs: fix to avoid deadlock in f2fs_read_inline_dir() 2019-03-12 19:07:09 -07:00
inode.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
Kconfig fscrypt: remove filesystem specific build config option 2019-01-23 23:56:43 -05:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
namei.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
node.c f2fs: fix to add refcount once page is tagged PG_private 2019-03-12 18:59:19 -07:00
node.h f2fs: check PageWriteback flag for ordered case 2018-12-26 15:16:56 -08:00
recovery.c f2fs: check PageWriteback flag for ordered case 2018-12-26 15:16:56 -08:00
segment.c f2fs: fix to add refcount once page is tagged PG_private 2019-03-12 18:59:19 -07:00
segment.h f2fs: don't wake up too frequently, if there is lots of IOs 2019-02-15 20:59:45 -08:00
shrinker.c f2fs: fix sbi->extent_list corruption issue 2018-12-26 15:16:54 -08:00
super.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
sysfs.c f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
trace.c f2fs: do not use mutex lock in atomic context 2019-03-05 19:58:06 -08:00
trace.h f2fs: add SPDX license identifiers 2018-09-12 13:07:10 -07:00
xattr.c f2fs: fix to adapt small inline xattr space in __find_inline_xattr() 2019-03-12 19:02:26 -07:00
xattr.h f2fs: fix to do sanity check with inode.i_inline_xattr_size 2019-03-12 19:02:26 -07:00