[PATCH] kernel: Introduce a write lock/unlock wrapper for tasklist_lock

[kernel test robot]

Hi Matthew,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/locking/core]
[also build test ERROR on arnd-asm-generic/master brauner-vfs/vfs.all vfs-idmapping/for-next linus/master v6.7-rc7 next-20231222]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox/Re-PATCH-kernel-Introduce-a-write-lock-unlock-wrapper-for-tasklist_lock/20231229-062352
base:   tip/locking/core
patch link:    https://lore.kernel.org/r/ZY30k7OCtxrdR9oP%40casper.infradead.org
patch subject: Re: [PATCH] kernel: Introduce a write lock/unlock wrapper for tasklist_lock
config: i386-randconfig-011-20231229 (https://download.01.org/0day-ci/archive/20231229/202312291936.G87eGfCo-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231229/202312291936.G87eGfCo-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312291936.G87eGfCo-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/locking/spinlock_debug.c: In function 'do_raw_write_lock_irq':
>> kernel/locking/spinlock_debug.c:217:9: error: implicit declaration of function 'arch_write_lock_irq'; did you mean '_raw_write_lock_irq'? [-Werror=implicit-function-declaration]
     217 |         arch_write_lock_irq(&lock->raw_lock);
         |         ^~~~~~~~~~~~~~~~~~~
         |         _raw_write_lock_irq
   cc1: some warnings being treated as errors


vim +217 kernel/locking/spinlock_debug.c

   213	
   214	void do_raw_write_lock_irq(rwlock_t *lock)
   215	{
   216		debug_write_lock_before(lock);
 > 217		arch_write_lock_irq(&lock->raw_lock);
   218		debug_write_lock_after(lock);
   219	}
   220	

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