Re: Linux 4.4.256

[Willy Tarreau]

On Sat, Feb 06, 2021 at 02:11:13PM +0100, Willy Tarreau wrote:
> Something like this looks more robust to me, it will use SUBLEVEL for
> values 0 to 255 and 255 for any larger value:
> 
> -	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
> +	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 255 \* (0$(SUBLEVEL) > 255) + 0$(SUBLEVEL) * (0$(SUBLEVEL \<= 255)); \

Bah, I obviously missed a backslash above and forgot spaces around parens.
Here's a tested version:

diff --git a/Makefile b/Makefile
index 7d86ad6ad36c..9b91b8815b40 100644
--- a/Makefile
+++ b/Makefile
@@ -1252,7 +1252,7 @@ endef
 
 define filechk_version.h
 	echo \#define LINUX_VERSION_CODE $(shell                         \
-	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
+	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 255 \* \( 0$(SUBLEVEL) \> 255 \) + 0$(SUBLEVEL) \* \( 0$(SUBLEVEL) \<= 255 \) ); \
 	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
 endef
 
Willy