X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=include%2Flttng%2Fkernel-version.h;h=747a674fc80cab132e0d7fe9ddf2e97b42e91c33;hb=db34449e0268698d2a21c68bfd96f62dc6e84c16;hp=a41829f0a6160ee33be6f8ea9da258910148c752;hpb=d4b8ca9cdf8ba6a8d52fdcb9433c6c73fa9702c1;p=lttng-modules.git

diff --git a/include/lttng/kernel-version.h b/include/lttng/kernel-version.h
index a41829f0..747a674f 100644
--- a/include/lttng/kernel-version.h
+++ b/include/lttng/kernel-version.h
@@ -11,6 +11,7 @@
 #define _LTTNG_KERNEL_VERSION_H
 
 #include <linux/version.h>
+#include <linux/types.h>
 #include <generated/utsrelease.h>
 
 /*
@@ -40,19 +41,22 @@
  * of LINUX_VERSION_CODE from the kernel headers and allocate 16bits.
  * Otherwise, keep using the version code from the headers to minimise the
  * behavior change and avoid regressions.
+ *
+ * Cast the result to uint64_t to prevent overflowing when we append distro
+ * specific version information.
  */
 #if (LTTNG_LINUX_PATCH >= 256)
 
 #define LTTNG_KERNEL_VERSION(a, b, c) \
-	(((a) << 24) + ((b) << 16) + (c))
+	((((a) << 24) + ((b) << 16) + (c)) * 1ULL)
 
 #define LTTNG_LINUX_VERSION_CODE \
 	LTTNG_KERNEL_VERSION(LTTNG_LINUX_MAJOR, LTTNG_LINUX_MINOR, LTTNG_LINUX_PATCH)
 
 #else
 
-#define LTTNG_KERNEL_VERSION(a, b, c) KERNEL_VERSION(a, b, c)
-#define LTTNG_LINUX_VERSION_CODE LINUX_VERSION_CODE
+#define LTTNG_KERNEL_VERSION(a, b, c) (KERNEL_VERSION(a, b, c) * 1ULL)
+#define LTTNG_LINUX_VERSION_CODE (LINUX_VERSION_CODE * 1ULL)
 
 #endif