From 08046a1b16f062b69e42a4414da62d1571502a49 Mon Sep 17 00:00:00 2001
From: Joe Sylve <joe@blackbagtech.com>
Date: Fri, 23 Dec 2016 14:09:40 -0600
Subject: [PATCH] Disabled timeout for kernel versions < 2.6.16.

---
 src/lime.h |  4 ++++
 src/main.c | 17 ++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/lime.h b/src/lime.h
index a1a0d53..a7a0f36 100644
--- a/src/lime.h
+++ b/src/lime.h
@@ -55,6 +55,10 @@
 #define DBG(fmt, args...) do {} while(0)
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+#define LIME_SUPPORTS_TIMING
+#endif
+
 //structures
 
 typedef struct {
diff --git a/src/main.c b/src/main.c
index 3004c31..e923321 100644
--- a/src/main.c
+++ b/src/main.c
@@ -50,7 +50,6 @@ char * path = 0;
 int dio = 0;
 int port = 0;
 int localhostonly = 0;
-long timeout = 1000;
 
 extern struct resource iomem_resource;
 
@@ -58,7 +57,11 @@ module_param(path, charp, S_IRUGO);
 module_param(dio, int, S_IRUGO);
 module_param(format, charp, S_IRUGO);
 module_param(localhostonly, int, S_IRUGO);
+
+#ifdef LIME_SUPPORTS_TIMING
+long timeout = 1000;
 module_param(timeout, long, S_IRUGO);
+#endif
 
 #define RETRY_IF_INTURRUPTED(f) ({ \
     ssize_t err; \
@@ -84,6 +87,10 @@ int init_module (void)
     DBG("  FORMAT: %s", format);
     DBG("  LOCALHOSTONLY: %u", localhostonly);
 
+#ifdef LIME_SUPPORTS_TIMING
+    DBG("  TIMEOUT: %lu", timeout);
+#endif
+
     memset(zero_page, 0, sizeof(zero_page));
 
     if (!strcmp(format, "raw")) mode = LIME_MODE_RAW;
@@ -188,12 +195,17 @@ static void write_range(struct resource * res) {
     void * v;
 
     ssize_t s;
+
+#ifdef LIME_SUPPORTS_TIMING
     ktime_t start,end;
+#endif
 
     DBG("Writing range %llx - %llx.", res->start, res->end);
 
     for (i = res->start; i <= res->end; i += is) {
+#ifdef LIME_SUPPORTS_TIMING
         start = ktime_get_real();
+#endif
 
         p = pfn_to_page((i) >> PAGE_SHIFT);
 
@@ -218,6 +230,7 @@ static void write_range(struct resource * res) {
             }
         }
 
+#ifdef LIME_SUPPORTS_TIMING
         end = ktime_get_real();
 
         if (timeout > 0 && ktime_to_ms(ktime_sub(end, start)) > timeout) {
@@ -225,6 +238,8 @@ static void write_range(struct resource * res) {
             write_padding(res->end - i + 1 - is);
             break;
         }
+#endif
+        
     }
 }