| Message ID | 20210128005110.2613902-3-masahiroy@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arch: syscalls: unifiy all syscalltbl.sh into scripts/syscalltbl.sh | expand |
On Thu, Jan 28, 2021 at 9:52 AM Masahiro Yamada <masahiroy@kernel.org> wrote: > > Building kernel/sys_ni.c with W=1 omits tons of -Wmissing-prototypes This is a typo. "omits" -> "emits" > warnings. > > $ make W=1 kernel/sys_ni.o > [ snip ] > CC kernel/sys_ni.o > In file included from kernel/sys_ni.c:10: > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' > 100 | __COND_SYSCALL(x64, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' > 256 | __X64_COND_SYSCALL(name) \ > | ^~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' > 120 | __COND_SYSCALL(ia32, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' > 257 | __IA32_COND_SYSCALL(name) > | ^~~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ... > > __SYS_STUB0() and __SYS_STUBx() defined a few lines above have forward > declarations. Let's do likewise for __COND_SYSCALL() to fix the > warnings. > > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> > --- > > arch/x86/include/asm/syscall_wrapper.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h > index a84333adeef2..80c08c7d5e72 100644 > --- a/arch/x86/include/asm/syscall_wrapper.h > +++ b/arch/x86/include/asm/syscall_wrapper.h > @@ -80,6 +80,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); > } > > #define __COND_SYSCALL(abi, name) \ > + __weak long __##abi##_##name(const struct pt_regs *__unused); \ > __weak long __##abi##_##name(const struct pt_regs *__unused) \ > { \ > return sys_ni_syscall(); \ > -- > 2.27.0 >
Hello! On 28.01.2021 3:50, Masahiro Yamada wrote: > Building kernel/sys_ni.c with W=1 omits tons of -Wmissing-prototypes Emits? > warnings. > > $ make W=1 kernel/sys_ni.o > [ snip ] > CC kernel/sys_ni.o > In file included from kernel/sys_ni.c:10: > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' > 100 | __COND_SYSCALL(x64, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' > 256 | __X64_COND_SYSCALL(name) \ > | ^~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' > 120 | __COND_SYSCALL(ia32, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' > 257 | __IA32_COND_SYSCALL(name) > | ^~~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ... > > __SYS_STUB0() and __SYS_STUBx() defined a few lines above have forward > declarations. Let's do likewise for __COND_SYSCALL() to fix the > warnings. > > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> > --- > > arch/x86/include/asm/syscall_wrapper.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h > index a84333adeef2..80c08c7d5e72 100644 > --- a/arch/x86/include/asm/syscall_wrapper.h > +++ b/arch/x86/include/asm/syscall_wrapper.h > @@ -80,6 +80,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); > } > > #define __COND_SYSCALL(abi, name) \ > + __weak long __##abi##_##name(const struct pt_regs *__unused); \ > __weak long __##abi##_##name(const struct pt_regs *__unused) \ Aren't these two lines identical? [...] MBR, Sergei
On 28.01.2021 10:59, Sergei Shtylyov wrote: [...] >> Building kernel/sys_ni.c with W=1 omits tons of -Wmissing-prototypes > > Emits? > >> warnings. >> >> $ make W=1 kernel/sys_ni.o >> [ snip ] >> CC kernel/sys_ni.o >> In file included from kernel/sys_ni.c:10: >> ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous >> prototype for '__x64_sys_io_setup' [-Wmissing-prototypes] >> 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ >> | ^~ >> ./arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro >> '__COND_SYSCALL' >> 100 | __COND_SYSCALL(x64, sys_##name) >> | ^~~~~~~~~~~~~~ >> ./arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro >> '__X64_COND_SYSCALL' >> 256 | __X64_COND_SYSCALL(name) \ >> | ^~~~~~~~~~~~~~~~~~ >> kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' >> 39 | COND_SYSCALL(io_setup); >> | ^~~~~~~~~~~~ >> ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous >> prototype for '__ia32_sys_io_setup' [-Wmissing-prototypes] >> 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ >> | ^~ >> ./arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro >> '__COND_SYSCALL' >> 120 | __COND_SYSCALL(ia32, sys_##name) >> | ^~~~~~~~~~~~~~ >> ./arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro >> '__IA32_COND_SYSCALL' >> 257 | __IA32_COND_SYSCALL(name) >> | ^~~~~~~~~~~~~~~~~~~ >> kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' >> 39 | COND_SYSCALL(io_setup); >> | ^~~~~~~~~~~~ >> ... >> >> __SYS_STUB0() and __SYS_STUBx() defined a few lines above have forward >> declarations. Let's do likewise for __COND_SYSCALL() to fix the >> warnings. >> >> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> >> --- >> >> arch/x86/include/asm/syscall_wrapper.h | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/arch/x86/include/asm/syscall_wrapper.h >> b/arch/x86/include/asm/syscall_wrapper.h >> index a84333adeef2..80c08c7d5e72 100644 >> --- a/arch/x86/include/asm/syscall_wrapper.h >> +++ b/arch/x86/include/asm/syscall_wrapper.h >> @@ -80,6 +80,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs >> *regs); >> } >> #define __COND_SYSCALL(abi, name) \ >> + __weak long __##abi##_##name(const struct pt_regs *__unused); \ >> __weak long __##abi##_##name(const struct pt_regs *__unused) \ > > Aren't these two lines identical? Ah, got it! :-) [...] MBR, Sergei
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h index a84333adeef2..80c08c7d5e72 100644 --- a/arch/x86/include/asm/syscall_wrapper.h +++ b/arch/x86/include/asm/syscall_wrapper.h @@ -80,6 +80,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); } #define __COND_SYSCALL(abi, name) \ + __weak long __##abi##_##name(const struct pt_regs *__unused); \ __weak long __##abi##_##name(const struct pt_regs *__unused) \ { \ return sys_ni_syscall(); \
Building kernel/sys_ni.c with W=1 omits tons of -Wmissing-prototypes warnings. $ make W=1 kernel/sys_ni.o [ snip ] CC kernel/sys_ni.o In file included from kernel/sys_ni.c:10: ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_io_setup' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ ./arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ ./arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' 39 | COND_SYSCALL(io_setup); | ^~~~~~~~~~~~ ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_io_setup' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ ./arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ ./arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' 39 | COND_SYSCALL(io_setup); | ^~~~~~~~~~~~ ... __SYS_STUB0() and __SYS_STUBx() defined a few lines above have forward declarations. Let's do likewise for __COND_SYSCALL() to fix the warnings. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> --- arch/x86/include/asm/syscall_wrapper.h | 1 + 1 file changed, 1 insertion(+)