linux-kernel - drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c:578:5: warning: stack frame size (2144) exceeds limit (2048) in 'hantro_g2_hevc_dec

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Date:   Tue, 7 Nov 2023 04:48:12 +0800
From:   kernel test robot <lkp@...el.com>
To:     Rohan McLure <rmclure@...ux.ibm.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Subject: drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c:578:5:
 warning: stack frame size (2144) exceeds limit (2048) in
 'hantro_g2_hevc_dec_run'

Hi Rohan,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d2f51b3516dade79269ff45eae2a7668ae711b25
commit: 6f0926c00565a91f3bd7ca1aa05db307daed5e0f powerpc/kcsan: Add KCSAN Support
date:   9 months ago
config: powerpc64-allyesconfig (https://download.01.org/0day-ci/archive/20231107/202311070412.oRu9ZBhc-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231107/202311070412.oRu9ZBhc-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311070412.oRu9ZBhc-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c:578:5: warning: stack frame size (2144) exceeds limit (2048) in 'hantro_g2_hevc_dec_run' [-Wframe-larger-than]
     578 | int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx)
         |     ^
   1 warning generated.
--
>> drivers/input/touchscreen/cyttsp4_core.c:1682:12: warning: stack frame size (2112) exceeds limit (2048) in 'cyttsp4_startup' [-Wframe-larger-than]
    1682 | static int cyttsp4_startup(struct cyttsp4 *cd)
         |            ^
   1 warning generated.
--
   drivers/net/ethernet/ibm/ibmvnic.c:194:6: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
     194 |         int rc, i;
         |             ^
>> drivers/net/ethernet/ibm/ibmvnic.c:5970:13: warning: stack frame size (2320) exceeds limit (2048) in 'ibmvnic_tasklet' [-Wframe-larger-than]
    5970 | static void ibmvnic_tasklet(struct tasklet_struct *t)
         |             ^
   2 warnings generated.
--
>> drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c:1244:5: warning: stack frame size (2368) exceeds limit (2048) in 'qed_mfw_process_tlv_req' [-Wframe-larger-than]
    1244 | int qed_mfw_process_tlv_req(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
         |     ^
   1 warning generated.


vim +/hantro_g2_hevc_dec_run +578 drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c

5523dc7b851849 drivers/staging/media/hantro/hantro_g2_hevc_dec.c Benjamin Gaignard 2021-07-15  577  
cb5dd5a0fa518d drivers/staging/media/hantro/hantro_g2_hevc_dec.c Benjamin Gaignard 2021-06-03 @578  int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx)

:::::: The code at line 578 was first introduced by commit
:::::: cb5dd5a0fa518dff14ff2b90837c3c8f98f4dd5c media: hantro: Introduce G2/HEVC decoder

:::::: TO: Benjamin Gaignard <benjamin.gaignard@...labora.com>
:::::: CC: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki