On Wed, 11 Nov 2015 14:34:19 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 2bba65ab5f9f1cebd21d95c410b96952851f58b3 > commit: e191357c4c31d02eb30736a49327ef32407fab47 [12891/13017] slub: create new ___slab_alloc function that can be called with irqs disabled > config: s390-allmodconfig (attached as .config) > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout e191357c4c31d02eb30736a49327ef32407fab47 > # save the attached .config to linux build tree > make.cross ARCH=s390 > > All warnings (new ones prefixed by >>): > > mm/slub.c: In function 'unfreeze_partials.isra.42': > mm/slub.c:2019:1: warning: 'unfreeze_partials.isra.42' uses dynamic stack allocation > } > ^ > mm/slub.c: In function 'get_partial_node.isra.43': > mm/slub.c:1654:1: warning: 'get_partial_node.isra.43' uses dynamic stack allocation > } > ^ > mm/slub.c: In function 'deactivate_slab': > mm/slub.c:1951:1: warning: 'deactivate_slab' uses dynamic stack allocation > } > ^ > mm/slub.c: In function '__slab_free': > mm/slub.c:2696:1: warning: '__slab_free' uses dynamic stack allocation > } > ^ > mm/slub.c: In function '___slab_alloc': > >> mm/slub.c:2396:1: warning: '___slab_alloc' uses dynamic stack allocation > } > ^ This patch doesn't add any dynamic stack allocations. The fact that slub.c already had a bunch of these warnings makes me suspect that it's happening in one of the s390 headers? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>