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

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Date:   Tue, 20 Jul 2021 13:28:45 +0100
From:   Chris Down <chris@...isdown.name>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Petr Mladek <pmladek@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the printk tree

Hey folks,

Naresh Kamboju writes:
>On Tue, 20 Jul 2021 at 13:13, Stephen Rothwell <sfr@...b.auug.org.au> 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