+ akpm, linux-mm Hey folks, Chris Down writes:
With !CONFIG_PRINTK, printk() is static in the header, but ia64's cmpxchg.h with CONFIG_IA64_DEBUG_CMPXCHG doesn't take this into account before trying to use it as extern, resulting in a compiler error: ./include/linux/printk.h:219:5: error: static declaration of 'printk' follows non-static declaration 219 | int printk(const char *s, ...) | ^~~~~~ ./arch/ia64/include/uapi/asm/cmpxchg.h:142:14: note: previous declaration of 'printk' was here 142 | extern int printk(const char *fmt, ...); \ | ^~~~~~ Make CONFIG_IA64_DEBUG_CMPXCHG dependent on CONFIG_PRINTK to avoid this. Signed-off-by: Chris Down <chris@xxxxxxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: linux-ia64@xxxxxxxxxxxxxxx
I now see that last month ia64 was marked as orphaned, so I'm going to send this over to Andrew/-mm.
Andrew, any chance you can take this in your tree? It's causing spurious LKP noise for some recent work on printk and would be great to have in -next.
Thanks, Chris
--- arch/ia64/Kconfig.debug | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/Kconfig.debug b/arch/ia64/Kconfig.debug index 40ca23bd228d..2ce008e2d164 100644 --- a/arch/ia64/Kconfig.debug +++ b/arch/ia64/Kconfig.debug @@ -39,7 +39,7 @@ 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 -- 2.30.1
