* arch/powerpc/mm/nohash/tlb.c:135:19: warning: unused function 'mmu_get_tsize'
@ 2023-01-18 22:20 kernel test robot
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From: kernel test robot @ 2023-01-18 22:20 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp
::::::
:::::: Manual check reason: "gcc: unused function warning for stub function"
::::::
BCC: lkp@intel.com
CC: llvm@lists.linux.dev
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Christophe Leroy <christophe.leroy@csgroup.eu>
CC: Michael Ellerman <mpe@ellerman.id.au>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c1649ec55708ae42091a2f1bca1ab49ecd722d55
commit: 63f501e07a8557bc8ab79d17ef76ae21df1e395d powerpc/8xx: Simplify TLB handling
date: 1 year, 3 months ago
:::::: branch date: 29 hours ago
:::::: commit date: 1 year, 3 months ago
config: powerpc-randconfig-r022-20230119 (https://download.01.org/0day-ci/archive/20230119/202301190622.PFMbkFGI-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63f501e07a8557bc8ab79d17ef76ae21df1e395d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 63f501e07a8557bc8ab79d17ef76ae21df1e395d
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/mm/nohash/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
__do_insb
^
arch/powerpc/include/asm/io.h:556:56: note: expanded from macro '__do_insb'
#define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/nohash/tlb.c:29:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:619:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:98:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/nohash/tlb.c:29:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:619:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:100:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/nohash/tlb.c:29:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:619:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:102:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/nohash/tlb.c:29:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:619:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:104:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/nohash/tlb.c:29:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:619:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:106:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> arch/powerpc/mm/nohash/tlb.c:135:19: warning: unused function 'mmu_get_tsize' [-Wunused-function]
static inline int mmu_get_tsize(int psize)
^
7 warnings generated.
vim +/mmu_get_tsize +135 arch/powerpc/mm/nohash/tlb.c
41151e77a4d96e arch/powerpc/mm/tlb_nohash.c Becky Bruce 2011-06-28 134
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 @135 static inline int mmu_get_tsize(int psize)
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 136 {
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 137 return mmu_psize_defs[psize].enc;
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 138 }
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 139 #else
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 140 static inline int mmu_get_tsize(int psize)
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 141 {
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 142 /* This isn't used on !Book3E for now */
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 143 return 0;
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 144 }
41151e77a4d96e arch/powerpc/mm/tlb_nohash.c Becky Bruce 2011-06-28 145 #endif /* CONFIG_PPC_BOOK3E_MMU */
25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 146
:::::: The code at line 135 was first introduced by commit
:::::: 25d21ad6e799cccd097b9df2a2fefe19a7e1dfcf powerpc: Add TLB management code for 64-bit Book3E
:::::: TO: Benjamin Herrenschmidt <benh@kernel.crashing.org>
:::::: CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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2023-01-18 22:20 arch/powerpc/mm/nohash/tlb.c:135:19: warning: unused function 'mmu_get_tsize' kernel test robot
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