Subject: Re: linux-next: build failure after merge of the printk tree

From: Chris Down <[email-masked]>
Date: Tue, 20 Jul 2021 13:28:45 +0100

Hey folks,

Naresh Kamboju writes:
>On Tue, 20 Jul 2021 at 13:13, Stephen Rothwell <[email-masked]> wrote:
>>
>> Hi all,
>>
>> After merging the printk tree, today's linux-next build (mips allnoconfig)
>> failed like this:
>>
>> arch/mips/kernel/genex.o: In function `handle_mcheck_int':
>> (.text+0x190c): undefined reference to `printk'
>> arch/mips/kernel/genex.o: In function `handle_reserved_int':
>> (.text+0x1c8c): undefined reference to `printk'
>>
>> Caused by commit
>>
>>   337015573718 ("printk: Userspace format indexing support")
>
>Following MIPS builds failed at our end due the reported problem.

Thanks: missed this as I made sure to change all .S files to use _printk, but 
this is in a .h file included in a .S file.

Here's what's needed. :-)

diff --git arch/mips/include/asm/asm.h arch/mips/include/asm/asm.h
index ea4b62ece336..2f8ce94ebaaf 100644
--- arch/mips/include/asm/asm.h
+++ arch/mips/include/asm/asm.h
@@ -114,7 +114,7 @@ symbol		=	value
  		.set	push;				\
  		.set	reorder;			\
  		PTR_LA	a0, 8f;				\
-		jal	printk;				\
+		jal	_printk;			\
  		.set	pop;				\
  		TEXT(string)
  #else