* [mips-linux:mips-next 76/76] arch/mips/kernel/traps.c:1904:17: warning: no previous prototype for 'do_gsexc'
@ 2020-07-31 23:12 kernel test robot
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From: kernel test robot @ 2020-07-31 23:12 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git mips-next
head: bc6e8dc112133a60efbede8acde36dd5d1e748a1
commit: bc6e8dc112133a60efbede8acde36dd5d1e748a1 [76/76] MIPS: handle Loongson-specific GSExc exception
config: mips-allyesconfig (attached as .config)
compiler: mips-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
git checkout bc6e8dc112133a60efbede8acde36dd5d1e748a1
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips
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 >>):
arch/mips/kernel/traps.c:438:17: warning: no previous prototype for 'do_be' [-Wmissing-prototypes]
438 | asmlinkage void do_be(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:741:17: warning: no previous prototype for 'do_ov' [-Wmissing-prototypes]
741 | asmlinkage void do_ov(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:865:17: warning: no previous prototype for 'do_fpe' [-Wmissing-prototypes]
865 | asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
| ^~~~~~
arch/mips/kernel/traps.c:1018:17: warning: no previous prototype for 'do_bp' [-Wmissing-prototypes]
1018 | asmlinkage void do_bp(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:1110:17: warning: no previous prototype for 'do_tr' [-Wmissing-prototypes]
1110 | asmlinkage void do_tr(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:1152:17: warning: no previous prototype for 'do_ri' [-Wmissing-prototypes]
1152 | asmlinkage void do_ri(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:1391:17: warning: no previous prototype for 'do_cpu' [-Wmissing-prototypes]
1391 | asmlinkage void do_cpu(struct pt_regs *regs)
| ^~~~~~
arch/mips/kernel/traps.c:1496:17: warning: no previous prototype for 'do_msa_fpe' [-Wmissing-prototypes]
1496 | asmlinkage void do_msa_fpe(struct pt_regs *regs, unsigned int msacsr)
| ^~~~~~~~~~
arch/mips/kernel/traps.c:1516:17: warning: no previous prototype for 'do_msa' [-Wmissing-prototypes]
1516 | asmlinkage void do_msa(struct pt_regs *regs)
| ^~~~~~
arch/mips/kernel/traps.c:1537:17: warning: no previous prototype for 'do_mdmx' [-Wmissing-prototypes]
1537 | asmlinkage void do_mdmx(struct pt_regs *regs)
| ^~~~~~~
arch/mips/kernel/traps.c:1549:17: warning: no previous prototype for 'do_watch' [-Wmissing-prototypes]
1549 | asmlinkage void do_watch(struct pt_regs *regs)
| ^~~~~~~~
arch/mips/kernel/traps.c:1576:17: warning: no previous prototype for 'do_mcheck' [-Wmissing-prototypes]
1576 | asmlinkage void do_mcheck(struct pt_regs *regs)
| ^~~~~~~~~
arch/mips/kernel/traps.c: In function 'do_mcheck':
arch/mips/kernel/traps.c:1579:17: warning: variable 'prev_state' set but not used [-Wunused-but-set-variable]
1579 | enum ctx_state prev_state;
| ^~~~~~~~~~
arch/mips/kernel/traps.c: At top level:
arch/mips/kernel/traps.c:1607:17: warning: no previous prototype for 'do_mt' [-Wmissing-prototypes]
1607 | asmlinkage void do_mt(struct pt_regs *regs)
| ^~~~~
arch/mips/kernel/traps.c:1643:17: warning: no previous prototype for 'do_dsp' [-Wmissing-prototypes]
1643 | asmlinkage void do_dsp(struct pt_regs *regs)
| ^~~~~~
arch/mips/kernel/traps.c:1651:17: warning: no previous prototype for 'do_reserved' [-Wmissing-prototypes]
1651 | asmlinkage void do_reserved(struct pt_regs *regs)
| ^~~~~~~~~~~
arch/mips/kernel/traps.c:1827:17: warning: no previous prototype for 'cache_parity_error' [-Wmissing-prototypes]
1827 | asmlinkage void cache_parity_error(void)
| ^~~~~~~~~~~~~~~~~~
arch/mips/kernel/traps.c:1875:17: warning: no previous prototype for 'do_ftlb' [-Wmissing-prototypes]
1875 | asmlinkage void do_ftlb(void)
| ^~~~~~~
>> arch/mips/kernel/traps.c:1904:17: warning: no previous prototype for 'do_gsexc' [-Wmissing-prototypes]
1904 | asmlinkage void do_gsexc(struct pt_regs *regs, u32 diag1)
| ^~~~~~~~
arch/mips/kernel/traps.c:1939:6: warning: no previous prototype for 'ejtag_exception_handler' [-Wmissing-prototypes]
1939 | void ejtag_exception_handler(struct pt_regs *regs)
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/mips/kernel/traps.c:1984:17: warning: no previous prototype for 'nmi_exception_handler' [-Wmissing-prototypes]
1984 | void __noreturn nmi_exception_handler(struct pt_regs *regs)
| ^~~~~~~~~~~~~~~~~~~~~
vim +/do_gsexc +1904 arch/mips/kernel/traps.c
1903
> 1904 asmlinkage void do_gsexc(struct pt_regs *regs, u32 diag1)
1905 {
1906 u32 exccode = (diag1 & LOONGSON_DIAG1_EXCCODE) >>
1907 LOONGSON_DIAG1_EXCCODE_SHIFT;
1908 enum ctx_state prev_state;
1909
1910 prev_state = exception_enter();
1911
1912 switch (exccode) {
1913 case 0x08:
1914 /* Undocumented exception, will trigger on certain
1915 * also-undocumented instructions accessible from userspace.
1916 * Processor state is not otherwise corrupted, but currently
1917 * we don't know how to proceed. Maybe there is some
1918 * undocumented control flag to enable the instructions?
1919 */
1920 force_sig(SIGILL);
1921 break;
1922
1923 default:
1924 /* None of the other exceptions, documented or not, have
1925 * further details given; none are encountered in the wild
1926 * either. Panic in case some of them turn out to be fatal.
1927 */
1928 show_regs(regs);
1929 panic("Unhandled Loongson exception - GSCause = %08x", diag1);
1930 }
1931
1932 exception_exit(prev_state);
1933 }
1934
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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