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41e1992665
GCC 11.1.0 and 11.2.0 generate a wrong warning when compiling the
kernel e.g. with allmodconfig:
arch/s390/kernel/setup.c: In function ‘setup_lowcore_dat_on’:
./include/linux/fortify-string.h:57:33: error: ‘__builtin_memcpy’ reading 128 bytes from a region of size 0 [-Werror=stringop-overread]
...
arch/s390/kernel/setup.c:526:9: note: in expansion of macro ‘memcpy’
526 | memcpy(abs_lc->cregs_save_area, S390_lowcore.cregs_save_area,
| ^~~~~~
This could be addressed by using absolute_pointer() with the
S390_lowcore macro, but this is not a good idea since this generates
worse code for performance critical paths.
Therefore simply use a for loop to copy the array in question and get
rid of the warning.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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| .. | ||
| syscalls | ||
| vdso32 | ||
| vdso64 | ||
| .gitignore | ||
| abs_lowcore.c | ||
| alternative.c | ||
| asm-offsets.c | ||
| audit.c | ||
| audit.h | ||
| cache.c | ||
| compat_audit.c | ||
| compat_linux.c | ||
| compat_linux.h | ||
| compat_ptrace.h | ||
| compat_signal.c | ||
| cpcmd.c | ||
| cpufeature.c | ||
| crash_dump.c | ||
| debug.c | ||
| diag.c | ||
| dis.c | ||
| dumpstack.c | ||
| early.c | ||
| early_printk.c | ||
| earlypgm.S | ||
| ebcdic.c | ||
| entry.h | ||
| entry.S | ||
| fpu.c | ||
| ftrace.c | ||
| ftrace.h | ||
| guarded_storage.c | ||
| head64.S | ||
| idle.c | ||
| ima_arch.c | ||
| ipl.c | ||
| ipl_vmparm.c | ||
| irq.c | ||
| jump_label.c | ||
| kdebugfs.c | ||
| kexec_elf.c | ||
| kexec_image.c | ||
| kprobes.c | ||
| kprobes.h | ||
| kprobes_insn_page.S | ||
| lgr.c | ||
| machine_kexec.c | ||
| machine_kexec_file.c | ||
| machine_kexec_reloc.c | ||
| Makefile | ||
| mcount.S | ||
| module.c | ||
| nmi.c | ||
| nospec-branch.c | ||
| nospec-sysfs.c | ||
| numa.c | ||
| os_info.c | ||
| perf_cpum_cf.c | ||
| perf_cpum_cf_common.c | ||
| perf_cpum_cf_events.c | ||
| perf_cpum_sf.c | ||
| perf_event.c | ||
| perf_pai_crypto.c | ||
| perf_pai_ext.c | ||
| perf_regs.c | ||
| process.c | ||
| processor.c | ||
| ptrace.c | ||
| reipl.S | ||
| relocate_kernel.S | ||
| runtime_instr.c | ||
| setup.c | ||
| signal.c | ||
| smp.c | ||
| stacktrace.c | ||
| sthyi.c | ||
| syscall.c | ||
| sysinfo.c | ||
| text_amode31.S | ||
| time.c | ||
| topology.c | ||
| trace.c | ||
| traps.c | ||
| unwind_bc.c | ||
| uprobes.c | ||
| uv.c | ||
| vdso.c | ||
| vmlinux.lds.S | ||
| vtime.c | ||