On 9/29/24 1:31 AM, kernel test robot wrote:
Hi Yonghong,
kernel test robot noticed the following build warnings:
[auto build test WARNING on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Yonghong-Song/bpf-Allow-each-subprog-having-stack-size-of-512-bytes/20240927-074744
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/20240926234526.1770736-1-yonghong.song%40linux.dev
patch subject: [PATCH bpf-next v3 4/5] bpf, x86: Add jit support for private stack
config: x86_64-randconfig-122-20240929 (https://download.01.org/0day-ci/archive/20240929/202409291637.cuQ0jRdD-lkp@xxxxxxxxx/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/20240929/202409291637.cuQ0jRdD-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409291637.cuQ0jRdD-lkp@xxxxxxxxx/
sparse warnings: (new ones prefixed by >>)
arch/x86/net/bpf_jit_comp.c:1503:47: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *private_frame_ptr @@ got void [noderef] __percpu *[assigned] private_frame_ptr @@
arch/x86/net/bpf_jit_comp.c:1503:47: sparse: expected void *private_frame_ptr
arch/x86/net/bpf_jit_comp.c:1503:47: sparse: got void [noderef] __percpu *[assigned] private_frame_ptr
Okay, will make the change by adding __percpu to furnction parameter type.
vim +1503 arch/x86/net/bpf_jit_comp.c
1442
1443 #define __LOAD_TCC_PTR(off) \
1444 EMIT3_off32(0x48, 0x8B, 0x85, off)
1445 /* mov rax, qword ptr [rbp - rounded_stack_depth - 16] */
1446 #define LOAD_TAIL_CALL_CNT_PTR(stack) \
1447 __LOAD_TCC_PTR(BPF_TAIL_CALL_CNT_PTR_STACK_OFF(stack))
1448
[...]
