arch/ia64/include/asm/mmu_context.h:127:48: error: variable 'old_rr4' set but not used
From: kernel test robot
Date: Wed Jun 22 2022 - 04:25:57 EST
Hi Haijun,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: ca1fdab7fd27eb069df1384b2850dcd0c2bebe8d
commit: 13e920d93e37fcaef4a9309515798a3cae9dcf19 net: wwan: t7xx: Add core components
date: 6 weeks ago
config: ia64-randconfig-r031-20220622 (https://download.01.org/0day-ci/archive/20220622/202206221623.Gi9Zz88b-lkp@xxxxxxxxx/config)
compiler: ia64-linux-gcc (GCC) 11.3.0
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=13e920d93e37fcaef4a9309515798a3cae9dcf19
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 13e920d93e37fcaef4a9309515798a3cae9dcf19
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/net/wwan/t7xx/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from arch/ia64/include/asm/pgtable.h:153,
from include/linux/pgtable.h:6,
from include/linux/mm.h:29,
from include/linux/scatterlist.h:8,
from include/linux/dma-mapping.h:10,
from drivers/net/wwan/t7xx/t7xx_pci.c:22:
arch/ia64/include/asm/mmu_context.h: In function 'reload_context':
>> arch/ia64/include/asm/mmu_context.h:127:48: error: variable 'old_rr4' set but not used [-Werror=unused-but-set-variable]
127 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
| ^~~~~~~
cc1: all warnings being treated as errors
vim +/old_rr4 +127 arch/ia64/include/asm/mmu_context.h
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 121
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 122 static inline void
badea125d7cbd9 include/asm-ia64/mmu_context.h David Mosberger-Tang 2005-07-25 123 reload_context (nv_mm_context_t context)
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 124 {
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 125 unsigned long rid;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 126 unsigned long rid_incr = 0;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 @127 unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 128
0a41e250116058 include/asm-ia64/mmu_context.h Peter Chubb 2005-08-16 129 old_rr4 = ia64_get_rr(RGN_BASE(RGN_HPAGE));
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 130 rid = context << 3; /* make space for encoding the region number */
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 131 rid_incr = 1 << 8;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 132
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 133 /* encode the region id, preferred page size, and VHPT enable bit: */
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 134 rr0 = (rid << 8) | (PAGE_SHIFT << 2) | 1;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 135 rr1 = rr0 + 1*rid_incr;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 136 rr2 = rr0 + 2*rid_incr;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 137 rr3 = rr0 + 3*rid_incr;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 138 rr4 = rr0 + 4*rid_incr;
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 139 #ifdef CONFIG_HUGETLB_PAGE
^1da177e4c3f41 include/asm-ia64/mmu_context.h Linus Torvalds 2005-04-16 140 rr4 = (rr4 & (~(0xfcUL))) | (old_rr4 & 0xfc);
0a41e250116058 include/asm-ia64/mmu_context.h Peter Chubb 2005-08-16 141
:::::: The code at line 127 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
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