This is a note to let you know that I've just added the patch titled
ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ia64-don-t-do-ia64_cmpxchg_debug-without-config_prin.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bdd2738ec99c7a52c9753c20177e767ecaa5aff7
Author: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Date: Sun Sep 26 10:12:24 2021 -0700
ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK
[ Upstream commit c15b5fc054c3d6c97e953617605235c5cb8ce979 ]
When CONFIG_PRINTK is not set, the CMPXCHG_BUGCHECK() macro calls
_printk(), but _printk() is a static inline function, not available
as an extern.
Since the purpose of the macro is to print the BUGCHECK info,
make this config option depend on PRINTK.
Fixes multiple occurrences of this build error:
../include/linux/printk.h:208:5: error: static declaration of '_printk' follows non-static declaration
208 | int _printk(const char *s, ...)
| ^~~~~~~
In file included from ../arch/ia64/include/asm/cmpxchg.h:5,
../arch/ia64/include/uapi/asm/cmpxchg.h:146:28: note: previous declaration of '_printk' with type 'int(const char *, ...)'
146 | extern int _printk(const char *fmt, ...);
Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Chris Down <chris@xxxxxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/ia64/Kconfig.debug b/arch/ia64/Kconfig.debug
index 677c409425df2..c27c13ca77f47 100644
--- a/arch/ia64/Kconfig.debug
+++ b/arch/ia64/Kconfig.debug
@@ -42,7 +42,7 @@ config DISABLE_VHPT
config IA64_DEBUG_CMPXCHG
bool "Turn on compare-and-exchange bug checking (slow!)"
- depends on DEBUG_KERNEL
+ depends on DEBUG_KERNEL && PRINTK
help
Selecting this option turns on bug checking for the IA-64
compare-and-exchange instructions. This is slow! Itaniums
