Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 36 insertions, 5 deletions

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 6e7223392e8..f2a5d8f656f 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -15,6 +15,7 @@
 
 #include <crypto/internal/hash.h>
 #include <crypto/scatterwalk.h>
+#include <linux/bug.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -46,7 +47,10 @@ static int hash_walk_next(struct crypto_hash_walk *walk)
 	unsigned int nbytes = min(walk->entrylen,
 				  ((unsigned int)(PAGE_SIZE)) - offset);
 
-	walk->data = kmap_atomic(walk->pg);
+	if (walk->flags & CRYPTO_ALG_ASYNC)
+		walk->data = kmap(walk->pg);
+	else
+		walk->data = kmap_atomic(walk->pg);
 	walk->data += offset;
 
 	if (offset & alignmask) {
@@ -93,8 +97,16 @@ int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)
 		return nbytes;
 	}
 
-	kunmap_atomic(walk->data);
-	crypto_yield(walk->flags);
+	if (walk->flags & CRYPTO_ALG_ASYNC)
+		kunmap(walk->pg);
+	else {
+		kunmap_atomic(walk->data);
+		/*
+		 * The may sleep test only makes sense for sync users.
+		 * Async users don't need to sleep here anyway.
+		 */
+		crypto_yield(walk->flags);
+	}
 
 	if (err)
 		return err;
@@ -124,12 +136,31 @@ int crypto_hash_walk_first(struct ahash_request *req,
 
 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));
 	walk->sg = req->src;
-	walk->flags = req->base.flags;
+	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;
 
 	return hash_walk_new_entry(walk);
 }
 EXPORT_SYMBOL_GPL(crypto_hash_walk_first);
 
+int crypto_ahash_walk_first(struct ahash_request *req,
+			    struct crypto_hash_walk *walk)
+{
+	walk->total = req->nbytes;
+
+	if (!walk->total)
+		return 0;
+
+	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));
+	walk->sg = req->src;
+	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;
+	walk->flags |= CRYPTO_ALG_ASYNC;
+
+	BUILD_BUG_ON(CRYPTO_TFM_REQ_MASK & CRYPTO_ALG_ASYNC);
+
+	return hash_walk_new_entry(walk);
+}
+EXPORT_SYMBOL_GPL(crypto_ahash_walk_first);
+
 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
 				  struct crypto_hash_walk *walk,
 				  struct scatterlist *sg, unsigned int len)
@@ -141,7 +172,7 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
 
 	walk->alignmask = crypto_hash_alignmask(hdesc->tfm);
 	walk->sg = sg;
-	walk->flags = hdesc->flags;
+	walk->flags = hdesc->flags & CRYPTO_TFM_REQ_MASK;
 
 	return hash_walk_new_entry(walk);
 }