linux-kernel - Re: [PATCH] NDS32: export __trace_hardirqs_on/

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Date:   Thu, 17 Feb 2022 11:02:52 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Greentime Hu <green.hu@...il.com>, Alan Kao <alankao@...estech.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nick Hu <nickhu@...estech.com>,
        Vincent Chen <deanbo422@...il.com>, kclin@...estech.com
Subject: Re: [PATCH] NDS32: export __trace_hardirqs_on/_offf for entry/exit

Hi--

I have an updated patch for this one ... if anyone is out there
to apply arch/nds32/ patches.


On 9/28/21 06:15, Greentime Hu wrote:
> Randy Dunlap <rdunlap@...radead.org> 於 2021年9月28日 週二 下午1:27寫道：
>>
>> Add exports for __trace_hardirqs_on/_off and use them in
>> kernel/ex-entry.S and kernel/ex-exit.S to fix build/linker errors.
>>
>> nds32le-linux-ld: arch/nds32/kernel/ex-entry.o: in function `fucop_ctl_done':
>> (.text+0x12a): undefined reference to `__trace_hardirqs_off'
>> (.text+0x12a): relocation truncated to fit: R_NDS32_25_PCREL_RELA against undefined symbol `__trace_hardirqs_off'
>> nds32le-linux-ld: arch/nds32/kernel/ex-exit.o: in function `no_work_pending':
>> (.text+0xea): undefined reference to `__trace_hardirqs_off'
>> nds32le-linux-ld: (.text+0xee): undefined reference to `__trace_hardirqs_off'
>> nds32le-linux-ld: (.text+0xf2): undefined reference to `__trace_hardirqs_on'
>> nds32le-linux-ld: (.text+0xf6): undefined reference to `__trace_hardirqs_on'
>>
>> Fixes: 0cde56e0280d ("nds32: Fix a kernel panic issue because of wrong frame pointer access.")
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Nick Hu <nickhu@...estech.com>
>> Cc: Greentime Hu <green.hu@...il.com>
>> Cc: Vincent Chen <deanbo422@...il.com>
>> ---
>>  arch/nds32/include/asm/ftrace.h |    3 +++
>>  arch/nds32/kernel/ex-entry.S    |    1 +
>>  arch/nds32/kernel/ex-exit.S     |    2 +-
>>  arch/nds32/kernel/ftrace.c      |    3 +++
>>  4 files changed, 8 insertions(+), 1 deletion(-)
>>
>> --- linux-next-20210917.orig/arch/nds32/kernel/ftrace.c
>> +++ linux-next-20210917/arch/nds32/kernel/ftrace.c
>> @@ -276,8 +276,11 @@ noinline void __trace_hardirqs_off(void)
>>  {
>>         trace_hardirqs_off();
>>  }
>> +EXPORT_SYMBOL(__trace_hardirqs_off);
>> +
>>  noinline void __trace_hardirqs_on(void)
>>  {
>>         trace_hardirqs_on();
>>  }
>> +EXPORT_SYMBOL(__trace_hardirqs_on);
>>  #endif /* CONFIG_TRACE_IRQFLAGS */
>> --- linux-next-20210917.orig/arch/nds32/include/asm/ftrace.h
>> +++ linux-next-20210917/arch/nds32/include/asm/ftrace.h
>> @@ -15,6 +15,9 @@
>>
>>  extern void _mcount(unsigned long parent_ip);
>>
>> +extern void __trace_hardirqs_off(void);
>> +extern void __trace_hardirqs_on(void);
>> +
>>  #ifdef CONFIG_DYNAMIC_FTRACE
>>
>>  #define FTRACE_ADDR ((unsigned long)_ftrace_caller)
>> --- linux-next-20210917.orig/arch/nds32/kernel/ex-entry.S
>> +++ linux-next-20210917/arch/nds32/kernel/ex-entry.S
>> @@ -8,6 +8,7 @@
>>  #include <asm/asm-offsets.h>
>>  #include <asm/page.h>
>>  #include <asm/fpu.h>
>> +#include <asm/ftrace.h>
>>
>>  #ifdef CONFIG_HWZOL
>>         .macro push_zol
>> --- linux-next-20210917.orig/arch/nds32/kernel/ex-exit.S
>> +++ linux-next-20210917/arch/nds32/kernel/ex-exit.S
>> @@ -9,7 +9,7 @@
>>  #include <asm/thread_info.h>
>>  #include <asm/current.h>
>>  #include <asm/fpu.h>
>> -
>> +#include <asm/ftrace.h>
>>
>>
>>  #ifdef CONFIG_HWZOL
> 
> loop in Alan and KC.

-- 
~Randy