drivers/spi/spi-mpc52xx-psc.c:195:5: warning: no previous prototype for function 'mpc52xx_psc_spi_transfer_one_message'

From: kernel test robot
Date: Sat May 13 2023 - 17:17:32 EST

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Hi Mark,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d4d58949a6eac1c45ab022562c8494725e1ac094
commit: 145cfc3840e5931a789a8e2e76af841ab4cad44b spi: mpc52xx-psc: Switch to using core message queue
date: 11 months ago
config: powerpc-mpc5200_defconfig (https://download.01.org/0day-ci/archive/20230514/202305140510.4bQWOrsi-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b0fb98227c90adf2536c9ad644a74d5e92961111)
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=145cfc3840e5931a789a8e2e76af841ab4cad44b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 145cfc3840e5931a789a8e2e76af841ab4cad44b
# 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 drivers/spi/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202305140510.4bQWOrsi-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

__do_insb
^
arch/powerpc/include/asm/io.h:578:56: 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 drivers/spi/spi-mpc52xx-psc.c:13:
In file included from include/linux/interrupt.h:11:
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:641:
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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:117:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:579:56: 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 drivers/spi/spi-mpc52xx-psc.c:13:
In file included from include/linux/interrupt.h:11:
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:641:
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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:119:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:580:56: 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 drivers/spi/spi-mpc52xx-psc.c:13:
In file included from include/linux/interrupt.h:11:
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:641:
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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:121:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:581:58: 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 drivers/spi/spi-mpc52xx-psc.c:13:
In file included from include/linux/interrupt.h:11:
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:641:
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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:123:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:582:58: 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 drivers/spi/spi-mpc52xx-psc.c:13:
In file included from include/linux/interrupt.h:11:
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:641:
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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:125:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:583:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> drivers/spi/spi-mpc52xx-psc.c:195:5: warning: no previous prototype for function 'mpc52xx_psc_spi_transfer_one_message' [-Wmissing-prototypes]
int mpc52xx_psc_spi_transfer_one_message(struct spi_controller *ctlr,
^
drivers/spi/spi-mpc52xx-psc.c:195:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int mpc52xx_psc_spi_transfer_one_message(struct spi_controller *ctlr,
^
static
7 warnings generated.

vim +/mpc52xx_psc_spi_transfer_one_message +195 drivers/spi/spi-mpc52xx-psc.c

194
> 195 int mpc52xx_psc_spi_transfer_one_message(struct spi_controller *ctlr,
196 struct spi_message *m)
197 {
198 struct spi_device *spi;
199 struct spi_transfer *t = NULL;
200 unsigned cs_change;
201 int status;
202
203 spi = m->spi;
204 cs_change = 1;
205 status = 0;
206 list_for_each_entry (t, &m->transfers, transfer_list) {
207 if (t->bits_per_word || t->speed_hz) {
208 status = mpc52xx_psc_spi_transfer_setup(spi, t);
209 if (status < 0)
210 break;
211 }
212
213 if (cs_change)
214 mpc52xx_psc_spi_activate_cs(spi);
215 cs_change = t->cs_change;
216
217 status = mpc52xx_psc_spi_transfer_rxtx(spi, t);
218 if (status)
219 break;
220 m->actual_length += t->len;
221
222 spi_transfer_delay_exec(t);
223
224 if (cs_change)
225 mpc52xx_psc_spi_deactivate_cs(spi);
226 }
227
228 m->status = status;
229 if (status || !cs_change)
230 mpc52xx_psc_spi_deactivate_cs(spi);
231
232 mpc52xx_psc_spi_transfer_setup(spi, NULL);
233
234 spi_finalize_current_message(ctlr);
235
236 return 0;
237 }
238

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

Next message: Fedor Pchelkin: "Re: [PATCH] wifi: ath9k: Fix memory leak in htc_connect_service"
Previous message: Helge Deller: "Re: [patch V4 00/37] cpu/hotplug, x86: Reworked parallel CPU bringup"
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