Merge branch 'kmap-atomic' of https://github.com/tsahee/LiME into tsahee-kmap-atomic

Author: kd8bny

src/lime.h

@@ -76,6 +76,10 @@
 #define LIME_SUPPORTS_TIMING
 #endif
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
+#define LIME_USE_KMAP_ATOMIC
+#endif
+
 #ifdef CONFIG_ZLIB_DEFLATE
 #define LIME_SUPPORTS_DEFLATE
 #endif

src/main.c

@@ -288,6 +288,12 @@ static void write_range(struct resource * res) {
             DBG("Padding partial page: vaddr %p size: %lu", (void *) i, (unsigned long) is);
             write_padding(is);
         } else {
+#ifdef LIME_USE_KMAP_ATOMIC
+            v = kmap_atomic(p);
+            copy_page(vpage, v);
+            kunmap_atomic(v);
+            s = write_vaddr(vpage, is);
+#else
             v = kmap(p);
             /*
              * If we need to compute the digest or compress the output
@@ -300,6 +306,7 @@ static void write_range(struct resource * res) {
                 s = write_vaddr(v, is);
             }
             kunmap(p);
+#endif
 
             if (s < 0) {
                 DBG("Failed to write page: vaddr %p. Skipping Range...", v);