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Subjectdrivers/net/wireless/realtek/rtw88/rtw8822c.c:2456:5: warning: variable 'corr_val' set but not used
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 472e5b056f000a778abb41f1e443de58eb259783
commit: ba0fbe236fb8a7b992e82d6eafb03a600f5eba43 rtw88: extract: make 8822c an individual kernel module
date: 5 months ago
config: parisc-randconfig-r024-20201002 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ba0fbe236fb8a7b992e82d6eafb03a600f5eba43
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ba0fbe236fb8a7b992e82d6eafb03a600f5eba43
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

In file included from include/linux/mm.h:95,
from include/linux/bvec.h:13,
from include/linux/skbuff.h:17,
from include/linux/if_ether.h:19,
from include/net/mac80211.h:18,
from drivers/net/wireless/realtek/rtw88/main.h:8,
from drivers/net/wireless/realtek/rtw88/rtw8822c.c:6:
include/asm-generic/pgtable.h: In function 'pte_clear_not_present_full':
arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable]
96 | pte_t old_pte; \
| ^~~~~~~
arch/parisc/include/asm/pgtable.h:322:34: note: in expansion of macro 'set_pte_at'
322 | #define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0))
| ^~~~~~~~~~
include/asm-generic/pgtable.h:202:2: note: in expansion of macro 'pte_clear'
202 | pte_clear(mm, address, ptep);
| ^~~~~~~~~
include/asm-generic/pgtable.h: In function '__ptep_modify_prot_commit':
arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable]
96 | pte_t old_pte; \
| ^~~~~~~
include/asm-generic/pgtable.h:641:2: note: in expansion of macro 'set_pte_at'
641 | set_pte_at(vma->vm_mm, addr, ptep, pte);
| ^~~~~~~~~~
drivers/net/wireless/realtek/rtw88/rtw8822c.c: In function 'rtw8822c_dpk_dc_corr_check':
>> drivers/net/wireless/realtek/rtw88/rtw8822c.c:2456:5: warning: variable 'corr_val' set but not used [-Wunused-but-set-variable]
2456 | u8 corr_val, corr_idx;
| ^~~~~~~~
--
In file included from arch/parisc/include/asm/io.h:6,
from include/linux/io.h:13,
from include/linux/irq.h:20,
from arch/parisc/include/asm/hardirq.h:13,
from include/linux/hardirq.h:9,
from include/linux/interrupt.h:11,
from include/linux/pci.h:38,
from drivers/net/wireless/realtek/rtw88/pci.c:6:
include/asm-generic/pgtable.h: In function 'pte_clear_not_present_full':
arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable]
96 | pte_t old_pte; \
| ^~~~~~~
arch/parisc/include/asm/pgtable.h:322:34: note: in expansion of macro 'set_pte_at'
322 | #define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0))
| ^~~~~~~~~~
include/asm-generic/pgtable.h:202:2: note: in expansion of macro 'pte_clear'
202 | pte_clear(mm, address, ptep);
| ^~~~~~~~~
include/asm-generic/pgtable.h: In function '__ptep_modify_prot_commit':
arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable]
96 | pte_t old_pte; \
| ^~~~~~~
include/asm-generic/pgtable.h:641:2: note: in expansion of macro 'set_pte_at'
641 | set_pte_at(vma->vm_mm, addr, ptep, pte);
| ^~~~~~~~~~
drivers/net/wireless/realtek/rtw88/pci.c: At top level:
>> drivers/net/wireless/realtek/rtw88/pci.c:1477:5: warning: no previous prototype for 'rtw_pci_probe' [-Wmissing-prototypes]
1477 | int rtw_pci_probe(struct pci_dev *pdev,
| ^~~~~~~~~~~~~
>> drivers/net/wireless/realtek/rtw88/pci.c:1557:6: warning: no previous prototype for 'rtw_pci_remove' [-Wmissing-prototypes]
1557 | void rtw_pci_remove(struct pci_dev *pdev)
| ^~~~~~~~~~~~~~
>> drivers/net/wireless/realtek/rtw88/pci.c:1579:6: warning: no previous prototype for 'rtw_pci_shutdown' [-Wmissing-prototypes]
1579 | void rtw_pci_shutdown(struct pci_dev *pdev)
| ^~~~~~~~~~~~~~~~

vim +/corr_val +2456 drivers/net/wireless/realtek/rtw88/rtw8822c.c

5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2452
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2453 static u8 rtw8822c_dpk_dc_corr_check(struct rtw_dev *rtwdev, u8 path)
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2454 {
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2455 u16 dc_i, dc_q;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 @2456 u8 corr_val, corr_idx;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2457
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2458 rtw_write32(rtwdev, REG_RXSRAM_CTL, 0x000900f0);
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2459 dc_i = (u16)rtw_read32_mask(rtwdev, REG_STAT_RPT, GENMASK(27, 16));
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2460 dc_q = (u16)rtw_read32_mask(rtwdev, REG_STAT_RPT, GENMASK(11, 0));
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2461
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2462 if (dc_i & BIT(11))
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2463 dc_i = 0x1000 - dc_i;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2464 if (dc_q & BIT(11))
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2465 dc_q = 0x1000 - dc_q;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2466
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2467 rtw_write32(rtwdev, REG_RXSRAM_CTL, 0x000000f0);
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2468 corr_idx = (u8)rtw_read32_mask(rtwdev, REG_STAT_RPT, GENMASK(7, 0));
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2469 corr_val = (u8)rtw_read32_mask(rtwdev, REG_STAT_RPT, GENMASK(15, 8));
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2470
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2471 if (dc_i > 200 || dc_q > 200 || corr_idx < 40 || corr_idx > 65)
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2472 return 1;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2473 else
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2474 return 0;
5227c2ee453d2f7 Tzu-En Huang 2019-09-09 2475

:::::: The code at line 2456 was first introduced by commit
:::::: 5227c2ee453d2f778192d8bb0f1a6072892aaa8e rtw88: 8822c: add SW DPK support

:::::: TO: Tzu-En Huang <tehuang@realtek.com>
:::::: CC: Kalle Valo <kvalo@codeaurora.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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