5dd33c9a4c
md/raid6 passes a list of 'struct page *' to the async_tx routines, which then either DMA map them for offload, or take the page_address for CPU based calculations. For RAID6 we sometime leave 'blanks' in the list of pages. For CPU based calcs, we want to treat theses as a page of zeros. For offloaded calculations, we simply don't pass a page to the hardware. Currently the 'blanks' are encoded as a pointer to raid6_empty_zero_page. This is a 4096 byte memory region, not a 'struct page'. This is mostly handled correctly but is rather ugly. So change the code to pass and expect a NULL pointer for the blanks. When taking page_address of a page, we need to check for a NULL and in that case use raid6_empty_zero_page. Signed-off-by: NeilBrown <neilb@suse.de> |
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.. | ||
async_tx | ||
ablkcipher.c | ||
aead.c | ||
aes_generic.c | ||
ahash.c | ||
algapi.c | ||
algboss.c | ||
ansi_cprng.c | ||
anubis.c | ||
api.c | ||
arc4.c | ||
authenc.c | ||
blkcipher.c | ||
blowfish.c | ||
camellia.c | ||
cast5.c | ||
cast6.c | ||
cbc.c | ||
ccm.c | ||
chainiv.c | ||
cipher.c | ||
compress.c | ||
crc32c.c | ||
cryptd.c | ||
crypto_null.c | ||
crypto_wq.c | ||
ctr.c | ||
cts.c | ||
deflate.c | ||
des_generic.c | ||
digest.c | ||
ecb.c | ||
eseqiv.c | ||
fcrypt.c | ||
fips.c | ||
gcm.c | ||
gf128mul.c | ||
ghash-generic.c | ||
hash.c | ||
hmac.c | ||
internal.h | ||
Kconfig | ||
khazad.c | ||
krng.c | ||
lrw.c | ||
lzo.c | ||
Makefile | ||
md4.c | ||
md5.c | ||
michael_mic.c | ||
pcbc.c | ||
pcompress.c | ||
proc.c | ||
ripemd.h | ||
rmd128.c | ||
rmd160.c | ||
rmd256.c | ||
rmd320.c | ||
rng.c | ||
salsa20_generic.c | ||
scatterwalk.c | ||
seed.c | ||
seqiv.c | ||
serpent.c | ||
sha1_generic.c | ||
sha256_generic.c | ||
sha512_generic.c | ||
shash.c | ||
tcrypt.c | ||
tcrypt.h | ||
tea.c | ||
testmgr.c | ||
testmgr.h | ||
tgr192.c | ||
twofish_common.c | ||
twofish.c | ||
vmac.c | ||
wp512.c | ||
xcbc.c | ||
xor.c | ||
xts.c | ||
zlib.c |