[CRYPTO] api: Kill crypto_km_types

When scatterwalk is built as a module digest.c was broken because it
requires the crypto_km_types structure which is in scatterwalk.  This
patch removes the crypto_km_types structure by encoding the logic into
crypto_kmap_type directly.

In fact, this even saves a few bytes of code (not to mention the data
structure itself) on i386 which is about the only place where it's
needed.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/internal.h

@@ -50,11 +50,16 @@ extern struct list_head crypto_alg_list;
 extern struct rw_semaphore crypto_alg_sem;
 extern struct blocking_notifier_head crypto_chain;
 
-extern enum km_type crypto_km_types[];
-
 static inline enum km_type crypto_kmap_type(int out)
 {
-	return crypto_km_types[(in_softirq() ? 2 : 0) + out];
+	enum km_type type;
+
+	if (in_softirq())
+		type = out * (KM_SOFTIRQ1 - KM_SOFTIRQ0) + KM_SOFTIRQ0;
+	else
+		type = out * (KM_USER1 - KM_USER0) + KM_USER0;
+
+	return type;
 }
 
 static inline void *crypto_kmap(struct page *page, int out)

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;