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authorHerbert Xu <herbert@gondor.apana.org.au>2016-07-12 13:18:00 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-07-18 17:35:50 +0800
commitac02725812cb3a814cfe1fdc2a8a59db073e7e66 (patch)
tree5480b15a94af14bd105e3981ece6a12898faeb14 /include
parent2ee732d57496b8365819dfb958bc1ff04fcd4cac (diff)
crypto: scatterwalk - Inline start/map/done
This patch inlines the functions scatterwalk_start, scatterwalk_map and scatterwalk_done as they're all tiny and mostly used by the block cipher walker. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
-rw-r--r--include/crypto/scatterwalk.h46
1 files changed, 40 insertions, 6 deletions
diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h
index 7e1a33645eb5..880e6be9e95e 100644
--- a/include/crypto/scatterwalk.h
+++ b/include/crypto/scatterwalk.h
@@ -16,14 +16,10 @@
#ifndef _CRYPTO_SCATTERWALK_H
#define _CRYPTO_SCATTERWALK_H
-#include <asm/kmap_types.h>
#include <crypto/algapi.h>
-#include <linux/hardirq.h>
#include <linux/highmem.h>
#include <linux/kernel.h>
-#include <linux/mm.h>
#include <linux/scatterlist.h>
-#include <linux/sched.h>
static inline void scatterwalk_crypto_chain(struct scatterlist *head,
struct scatterlist *sg,
@@ -83,11 +79,49 @@ static inline void scatterwalk_unmap(void *vaddr)
kunmap_atomic(vaddr);
}
-void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg);
+static inline void scatterwalk_start(struct scatter_walk *walk,
+ struct scatterlist *sg)
+{
+ walk->sg = sg;
+ walk->offset = sg->offset;
+}
+
+static inline void *scatterwalk_map(struct scatter_walk *walk)
+{
+ return kmap_atomic(scatterwalk_page(walk)) +
+ offset_in_page(walk->offset);
+}
+
+static inline void scatterwalk_pagedone(struct scatter_walk *walk, int out,
+ unsigned int more)
+{
+ if (out) {
+ struct page *page;
+
+ page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
+ /* Test ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE first as
+ * PageSlab cannot be optimised away per se due to
+ * use of volatile pointer.
+ */
+ if (ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE && !PageSlab(page))
+ flush_dcache_page(page);
+ }
+
+ if (more && walk->offset >= walk->sg->offset + walk->sg->length)
+ scatterwalk_start(walk, sg_next(walk->sg));
+}
+
+static inline void scatterwalk_done(struct scatter_walk *walk, int out,
+ int more)
+{
+ if (!more || walk->offset >= walk->sg->offset + walk->sg->length ||
+ !(walk->offset & (PAGE_SIZE - 1)))
+ scatterwalk_pagedone(walk, out, more);
+}
+
void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
size_t nbytes, int out);
void *scatterwalk_map(struct scatter_walk *walk);
-void scatterwalk_done(struct scatter_walk *walk, int out, int more);
void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
unsigned int start, unsigned int nbytes, int out);