Messages in this thread | | | Date | Fri, 4 Dec 2020 11:22:31 -0800 | From | "Paul E. McKenney" <> | Subject | Re: [rcu:rcu/next 94/101] mm/slab_common.c:555: undefined reference to `kmem_cache_last_alloc' |
| |
On Fri, Dec 04, 2020 at 12:53:56PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next > head: 413d9f332cbd16d951c22a41f2e5f53c1a75ae1c > commit: f7c3fb4fc476a8a7a3cfc78cffbf1de13c1899b7 [94/101] mm: Add kmem_last_alloc() to return last allocation for memory block > config: i386-randconfig-p001-20201204 (attached as .config) > compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 > reproduce (this is a W=1 build): > # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=f7c3fb4fc476a8a7a3cfc78cffbf1de13c1899b7 > git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git > git fetch --no-tags rcu rcu/next > git checkout f7c3fb4fc476a8a7a3cfc78cffbf1de13c1899b7 > # save the attached .config to linux build tree > make W=1 ARCH=i386 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All errors (new ones prefixed by >>): > > ld: mm/slab_common.o: in function `kmem_last_alloc': > >> mm/slab_common.c:555: undefined reference to `kmem_cache_last_alloc' > > vim +555 mm/slab_common.c
Good catch! I had no idea that the slab definition of the kmem_cache_last_alloc() function was under CONFIG_NUMA...
Will fold a fix in with attribution.
Thanx, Paul
> 538 > 539 /* > 540 * If the pointer references a slab-allocated object and if sufficient > 541 * debugging is enabled, return the returrn address for the corresponding > 542 * allocation. Otherwise, return NULL. Note that passing random pointers > 543 * to this function (including addresses of on-stack variables) is likely > 544 * to result in panics. > 545 */ > 546 void *kmem_last_alloc(void *object) > 547 { > 548 struct page *page; > 549 > 550 if (!virt_addr_valid(object)) > 551 return NULL; > 552 page = virt_to_head_page(object); > 553 if (!PageSlab(page)) > 554 return NULL; > > 555 return kmem_cache_last_alloc(page->slab_cache, object); > 556 } > 557 EXPORT_SYMBOL_GPL(kmem_last_alloc); > 558 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
| |