Re: [PATCH] nios2: ksyms: Declare __mulsi3 export

[Dinh Nguyen <dinguyen@kernel.org>]

On 10/19/26 06:16, Arnd Bergmann wrote:
> On Mon, Oct 19, 2026, at 11:49, Thomas Weißschuh wrote:
>> GCC may emit libcalls to __mulsi3(). As modpost is not aware that this
>> function is provided through the linked in libgcc, it fails:
>>
>> ERROR: modpost: kernel/locking/test-ww_mutex.ko: symbol '__mulsi3' undefined!
>> ERROR: modpost: kernel/time/test_udelay.ko: symbol '__mulsi3' undefined!
>> ERROR: modpost: kernel/resource_kunit.ko: symbol '__mulsi3' undefined!
>> ERROR: modpost: fs/fuse/virtiofs.ko: symbol '__mulsi3' undefined!
>> etc.
>>
>> Make sure modpost can see the symbol from libgcc.
>>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Closes:
>> https://lore.kernel.org/oe-kbuild-all/202610171933.J4bFOfL8-lkp@intel.com/
>> Fixes: 2fc8483fdcde ("nios2: Build infrastructure")
>> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> 
> Acked-by: Arnd Bergmann <arnd@arndb.de>
> 
> The patch looks correct to me, but it would also be nice to not use
> libgcc at all. What I see is that only arc, nios2, openrisc and
> parisc still link against the toolchain-provided libgcc, everything
> else uses the kernel's own runtime.
> 
> It's probably not even that hard to do right, here is what I found
> is imported from libgcc.
> 
Patch applied!

Thanks for the suggestion Arnd, I'll work to on the NIOS2.

Dinh