sysfs: Introduce sysfs_rename_mutex

[linux-2.6-omap-h63xx.git] / crypto / scatterwalk.c

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 81afd1790a1d1c28fc8a7e2569940401a668d5ac..3052f6507f53f3118de2adfc818da7d56e78b3f4 100644 (file)
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -23,14 +23,6 @@
 #include "internal.h"
 #include "scatterwalk.h"
 
-enum km_type crypto_km_types[] = {
-       KM_USER0,
-       KM_USER1,
-       KM_SOFTIRQ0,
-       KM_SOFTIRQ1,
-};
-EXPORT_SYMBOL_GPL(crypto_km_types);
-
 static inline void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
 {
        void *src = out ? buf : sgdata;
@@ -107,3 +99,25 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
        }
 }
 EXPORT_SYMBOL_GPL(scatterwalk_copychunks);
+
+void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
+                             unsigned int start, unsigned int nbytes, int out)
+{
+       struct scatter_walk walk;
+       unsigned int offset = 0;
+
+       for (;;) {
+               scatterwalk_start(&walk, sg);
+
+               if (start < offset + sg->length)
+                       break;
+
+               offset += sg->length;
+               sg = sg_next(sg);
+       }
+
+       scatterwalk_advance(&walk, start - offset);
+       scatterwalk_copychunks(buf, &walk, nbytes, out);
+       scatterwalk_done(&walk, out, 0);
+}
+EXPORT_SYMBOL_GPL(scatterwalk_map_and_copy);