[PATCH 5.10 053/157] kbuild: Fix <linux/version.h> for empty SUBLEVEL or PATCHLEVEL again
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-03-22 12:44:32
Also in:
lkml
From: Masahiro Yamada <masahiroy@kernel.org>
commit 207da4c82ade9a6d59f7e794d737ba0748613fa2 upstream.
Commit 78d3bb4483ba ("kbuild: Fix <linux/version.h> for empty SUBLEVEL
or PATCHLEVEL") fixed the build error for empty SUBLEVEL or PATCHLEVEL
by prepending a zero.
Commit 9b82f13e7ef3 ("kbuild: clamp SUBLEVEL to 255") re-introduced
this issue.
This time, we cannot take the same approach because we have C code:
#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL)
#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
Replace empty SUBLEVEL/PATCHLEVEL with a zero.
Fixes: 9b82f13e7ef3 ("kbuild: clamp SUBLEVEL to 255")
Reported-by: Christian Zigotzky <redacted>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-and-tested-by: Sasha Levin [off-list ref]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
Makefile | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/Makefile
+++ b/Makefile@@ -1249,15 +1249,17 @@ endef define filechk_version.h if [ $(SUBLEVEL) -gt 255 ]; then \ echo \#define LINUX_VERSION_CODE $(shell \ - expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 255); \ + expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ else \ echo \#define LINUX_VERSION_CODE $(shell \ - expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ + expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ fi; \ echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ ((c) > 255 ? 255 : (c)))' endef +$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0) +$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0) $(version_h): FORCE $(call filechk,version.h) $(Q)rm -f $(old_version_h)