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authorAkinobu Mita <akinobu.mita@gmail.com>2013-07-08 16:01:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-09 10:33:30 -0700
commitd05257238f9bbe96477162448c2dda08309af208 (patch)
treef5c6ed6be169c9ce66c49179fb94135dfd66a7f3 /drivers/crypto
parentdf642cea25c90dc7d5dcd9d3b480b6b59de7d787 (diff)
downloadop-kernel-dev-d05257238f9bbe96477162448c2dda08309af208.zip
op-kernel-dev-d05257238f9bbe96477162448c2dda08309af208.tar.gz
crypto: talitos: use sg_pcopy_to_buffer()
Use sg_pcopy_to_buffer() which is better than the function previously used. Because it doesn't do kmap/kunmap for skipped pages. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Horia Geanta <horia.geanta@freescale.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/talitos.c60
1 files changed, 1 insertions, 59 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 5b2b5e6..661dc3e 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1112,64 +1112,6 @@ static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
return sg_nents;
}
-/**
- * sg_copy_end_to_buffer - Copy end data from SG list to a linear buffer
- * @sgl: The SG list
- * @nents: Number of SG entries
- * @buf: Where to copy to
- * @buflen: The number of bytes to copy
- * @skip: The number of bytes to skip before copying.
- * Note: skip + buflen should equal SG total size.
- *
- * Returns the number of copied bytes.
- *
- **/
-static size_t sg_copy_end_to_buffer(struct scatterlist *sgl, unsigned int nents,
- void *buf, size_t buflen, unsigned int skip)
-{
- unsigned int offset = 0;
- unsigned int boffset = 0;
- struct sg_mapping_iter miter;
- unsigned long flags;
- unsigned int sg_flags = SG_MITER_ATOMIC;
- size_t total_buffer = buflen + skip;
-
- sg_flags |= SG_MITER_FROM_SG;
-
- sg_miter_start(&miter, sgl, nents, sg_flags);
-
- local_irq_save(flags);
-
- while (sg_miter_next(&miter) && offset < total_buffer) {
- unsigned int len;
- unsigned int ignore;
-
- if ((offset + miter.length) > skip) {
- if (offset < skip) {
- /* Copy part of this segment */
- ignore = skip - offset;
- len = miter.length - ignore;
- if (boffset + len > buflen)
- len = buflen - boffset;
- memcpy(buf + boffset, miter.addr + ignore, len);
- } else {
- /* Copy all of this segment (up to buflen) */
- len = miter.length;
- if (boffset + len > buflen)
- len = buflen - boffset;
- memcpy(buf + boffset, miter.addr, len);
- }
- boffset += len;
- }
- offset += miter.length;
- }
-
- sg_miter_stop(&miter);
-
- local_irq_restore(flags);
- return boffset;
-}
-
/*
* allocate and map the extended descriptor
*/
@@ -1800,7 +1742,7 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
if (to_hash_later) {
int nents = sg_count(areq->src, nbytes, &chained);
- sg_copy_end_to_buffer(areq->src, nents,
+ sg_pcopy_to_buffer(areq->src, nents,
req_ctx->bufnext,
to_hash_later,
nbytes - to_hash_later);
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