crypto: scatterwalk - Inline start/map/done

[cascardo/linux.git] / crypto / scatterwalk.c

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index ea5815c..52ce17a 100644 (file)
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -18,8 +18,6 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/module.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
 #include <linux/scatterlist.h>
 
 static inline void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
@@ -30,53 +28,6 @@ static inline void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
        memcpy(dst, src, nbytes);
 }
 
-void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg)
-{
-       walk->sg = sg;
-
-       BUG_ON(!sg->length);
-
-       walk->offset = sg->offset;
-}
-EXPORT_SYMBOL_GPL(scatterwalk_start);
-
-void *scatterwalk_map(struct scatter_walk *walk)
-{
-       return kmap_atomic(scatterwalk_page(walk)) +
-              offset_in_page(walk->offset);
-}
-EXPORT_SYMBOL_GPL(scatterwalk_map);
-
-static 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 += PAGE_SIZE - 1;
-               walk->offset &= PAGE_MASK;
-               if (walk->offset >= walk->sg->offset + walk->sg->length)
-                       scatterwalk_start(walk, sg_next(walk->sg));
-       }
-}
-
-void scatterwalk_done(struct scatter_walk *walk, int out, int more)
-{
-       if (!(scatterwalk_pagelen(walk) & (PAGE_SIZE - 1)) || !more)
-               scatterwalk_pagedone(walk, out, more);
-}
-EXPORT_SYMBOL_GPL(scatterwalk_done);
-
 void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
                            size_t nbytes, int out)
 {
@@ -87,9 +38,11 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
                if (len_this_page > nbytes)
                        len_this_page = nbytes;
 
-               vaddr = scatterwalk_map(walk);
-               memcpy_dir(buf, vaddr, len_this_page, out);
-               scatterwalk_unmap(vaddr);
+               if (out != 2) {
+                       vaddr = scatterwalk_map(walk);
+                       memcpy_dir(buf, vaddr, len_this_page, out);
+                       scatterwalk_unmap(vaddr);
+               }
 
                scatterwalk_advance(walk, len_this_page);
 
@@ -99,7 +52,7 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
                buf += len_this_page;
                nbytes -= len_this_page;
 
-               scatterwalk_pagedone(walk, out, 1);
+               scatterwalk_pagedone(walk, out & 1, 1);
        }
 }
 EXPORT_SYMBOL_GPL(scatterwalk_copychunks);
@@ -125,28 +78,6 @@ void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
 }
 EXPORT_SYMBOL_GPL(scatterwalk_map_and_copy);
 
-int scatterwalk_bytes_sglen(struct scatterlist *sg, int num_bytes)
-{
-       int offset = 0, n = 0;
-
-       /* num_bytes is too small */
-       if (num_bytes < sg->length)
-               return -1;
-
-       do {
-               offset += sg->length;
-               n++;
-               sg = sg_next(sg);
-
-               /* num_bytes is too large */
-               if (unlikely(!sg && (num_bytes < offset)))
-                       return -1;
-       } while (sg && (num_bytes > offset));
-
-       return n;
-}
-EXPORT_SYMBOL_GPL(scatterwalk_bytes_sglen);
-
 struct scatterlist *scatterwalk_ffwd(struct scatterlist dst[2],
                                     struct scatterlist *src,
                                     unsigned int len)