* [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
@ 2018-05-29 3:12 kbuild test robot
2018-05-29 7:20 ` Christoph Hellwig
0 siblings, 1 reply; 8+ messages in thread
From: kbuild test robot @ 2018-05-29 3:12 UTC (permalink / raw)
To: Christoph Hellwig
Cc: kbuild-all, linux-fsdevel, Greg Kroah-Hartman, Darrick J. Wong
[-- Attachment #1: Type: text/plain, Size: 11639 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git hch.aio
head: 89b310a2b28dafbf3958e292785d51b7017da19e
commit: 7a074e96dee62586c935c80cecd931431bfdd0be [7/40] aio: implement io_pgetevents
config: i386-randconfig-c0-05290848 (attached as .config)
compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
reproduce:
git checkout 7a074e96dee62586c935c80cecd931431bfdd0be
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from fs/aio.c:19:
include/linux/syscalls.h:233:18: warning: 'sys_io_setup' alias between functions of incompatible types 'long int(unsigned int, aio_context_t *)' and 'long int(long int, long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
^~~~~~~~~~~~~~~
include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
^~~~~~~~~~~~~~~
>> include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
SYSCALL_DEFINE6(io_pgetevents,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
SYSCALL_DEFINE6(io_pgetevents,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:233:18: warning: 'sys_io_getevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *)' and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:233:18: warning: 'sys_io_cancel' alias between functions of incompatible types 'long int(aio_context_t, struct iocb *, struct io_event *)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:233:18: warning: 'sys_io_submit' alias between functions of incompatible types 'long int(aio_context_t, long int, struct iocb **)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
^~~~~~~~~~~~~~~
include/linux/syscalls.h:233:18: warning: 'sys_io_destroy' alias between functions of incompatible types 'long int(aio_context_t)' and 'long int(long int)' [-Wattribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
vim +233 include/linux/syscalls.h
609320c8a Yonghong Song 2017-09-07 219
bed1ffca0 Frederic Weisbecker 2009-03-13 220 #define SYSCALL_DEFINEx(x, sname, ...) \
99e621f79 Al Viro 2013-03-05 221 SYSCALL_METADATA(sname, x, __VA_ARGS__) \
bed1ffca0 Frederic Weisbecker 2009-03-13 @222 __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
bed1ffca0 Frederic Weisbecker 2009-03-13 223
2cf096668 Al Viro 2013-01-21 224 #define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
1bd21c6c2 Dominik Brodowski 2018-04-05 225
e145242ea Dominik Brodowski 2018-04-09 226 /*
e145242ea Dominik Brodowski 2018-04-09 227 * The asmlinkage stub is aliased to a function named __se_sys_*() which
e145242ea Dominik Brodowski 2018-04-09 228 * sign-extends 32-bit ints to longs whenever needed. The actual work is
e145242ea Dominik Brodowski 2018-04-09 229 * done within __do_sys_*().
e145242ea Dominik Brodowski 2018-04-09 230 */
1bd21c6c2 Dominik Brodowski 2018-04-05 231 #ifndef __SYSCALL_DEFINEx
bed1ffca0 Frederic Weisbecker 2009-03-13 232 #define __SYSCALL_DEFINEx(x, name, ...) \
83460ec8d Andi Kleen 2013-11-12 @233 asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
e145242ea Dominik Brodowski 2018-04-09 234 __attribute__((alias(__stringify(__se_sys##name)))); \
c9a211951 Howard McLauchlan 2018-03-21 235 ALLOW_ERROR_INJECTION(sys##name, ERRNO); \
e145242ea Dominik Brodowski 2018-04-09 236 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
e145242ea Dominik Brodowski 2018-04-09 237 asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
e145242ea Dominik Brodowski 2018-04-09 238 asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
1a94bc347 Heiko Carstens 2009-01-14 239 { \
e145242ea Dominik Brodowski 2018-04-09 240 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\
07fe6e00f Al Viro 2013-01-21 241 __MAP(x,__SC_TEST,__VA_ARGS__); \
2cf096668 Al Viro 2013-01-21 242 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
2cf096668 Al Viro 2013-01-21 243 return ret; \
1a94bc347 Heiko Carstens 2009-01-14 244 } \
e145242ea Dominik Brodowski 2018-04-09 245 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
1bd21c6c2 Dominik Brodowski 2018-04-05 246 #endif /* __SYSCALL_DEFINEx */
1a94bc347 Heiko Carstens 2009-01-14 247
:::::: The code at line 233 was first introduced by commit
:::::: 83460ec8dcac14142e7860a01fa59c267ac4657c syscalls.h: use gcc alias instead of assembler aliases for syscalls
:::::: TO: Andi Kleen <ak@linux.intel.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 3:12 [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' kbuild test robot
@ 2018-05-29 7:20 ` Christoph Hellwig
2018-05-29 7:20 ` Greg Kroah-Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Christoph Hellwig @ 2018-05-29 7:20 UTC (permalink / raw)
To: kbuild test robot
Cc: Christoph Hellwig, kbuild-all, linux-fsdevel, Greg Kroah-Hartman,
Darrick J. Wong, viro, x86
I'm not seeing anything like this in my i386 builds. Is this
something new in gcc 8.1? Also it seems deeply hidden in the syscall
macros, so I might need some help understanding those.
On Tue, May 29, 2018 at 11:12:31AM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git hch.aio
> head: 89b310a2b28dafbf3958e292785d51b7017da19e
> commit: 7a074e96dee62586c935c80cecd931431bfdd0be [7/40] aio: implement io_pgetevents
> config: i386-randconfig-c0-05290848 (attached as .config)
> compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> reproduce:
> git checkout 7a074e96dee62586c935c80cecd931431bfdd0be
> # save the attached .config to linux build tree
> make ARCH=i386
>
> All warnings (new ones prefixed by >>):
>
> In file included from fs/aio.c:19:
> include/linux/syscalls.h:233:18: warning: 'sys_io_setup' alias between functions of incompatible types 'long int(unsigned int, aio_context_t *)' and 'long int(long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:238:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> ^~~~~~~~~~~~~~~
> >> include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> SYSCALL_DEFINE6(io_pgetevents,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:238:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> SYSCALL_DEFINE6(io_pgetevents,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:233:18: warning: 'sys_io_getevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *)' and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:238:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:233:18: warning: 'sys_io_cancel' alias between functions of incompatible types 'long int(aio_context_t, struct iocb *, struct io_event *)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:238:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:233:18: warning: 'sys_io_submit' alias between functions of incompatible types 'long int(aio_context_t, long int, struct iocb **)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:238:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> ^~~~~~~~~~~~~~~
> include/linux/syscalls.h:233:18: warning: 'sys_io_destroy' alias between functions of incompatible types 'long int(aio_context_t)' and 'long int(long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
>
> vim +233 include/linux/syscalls.h
>
> 609320c8a Yonghong Song 2017-09-07 219
> bed1ffca0 Frederic Weisbecker 2009-03-13 220 #define SYSCALL_DEFINEx(x, sname, ...) \
> 99e621f79 Al Viro 2013-03-05 221 SYSCALL_METADATA(sname, x, __VA_ARGS__) \
> bed1ffca0 Frederic Weisbecker 2009-03-13 @222 __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> bed1ffca0 Frederic Weisbecker 2009-03-13 223
> 2cf096668 Al Viro 2013-01-21 224 #define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
> 1bd21c6c2 Dominik Brodowski 2018-04-05 225
> e145242ea Dominik Brodowski 2018-04-09 226 /*
> e145242ea Dominik Brodowski 2018-04-09 227 * The asmlinkage stub is aliased to a function named __se_sys_*() which
> e145242ea Dominik Brodowski 2018-04-09 228 * sign-extends 32-bit ints to longs whenever needed. The actual work is
> e145242ea Dominik Brodowski 2018-04-09 229 * done within __do_sys_*().
> e145242ea Dominik Brodowski 2018-04-09 230 */
> 1bd21c6c2 Dominik Brodowski 2018-04-05 231 #ifndef __SYSCALL_DEFINEx
> bed1ffca0 Frederic Weisbecker 2009-03-13 232 #define __SYSCALL_DEFINEx(x, name, ...) \
> 83460ec8d Andi Kleen 2013-11-12 @233 asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> e145242ea Dominik Brodowski 2018-04-09 234 __attribute__((alias(__stringify(__se_sys##name)))); \
> c9a211951 Howard McLauchlan 2018-03-21 235 ALLOW_ERROR_INJECTION(sys##name, ERRNO); \
> e145242ea Dominik Brodowski 2018-04-09 236 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
> e145242ea Dominik Brodowski 2018-04-09 237 asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
> e145242ea Dominik Brodowski 2018-04-09 238 asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> 1a94bc347 Heiko Carstens 2009-01-14 239 { \
> e145242ea Dominik Brodowski 2018-04-09 240 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\
> 07fe6e00f Al Viro 2013-01-21 241 __MAP(x,__SC_TEST,__VA_ARGS__); \
> 2cf096668 Al Viro 2013-01-21 242 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
> 2cf096668 Al Viro 2013-01-21 243 return ret; \
> 1a94bc347 Heiko Carstens 2009-01-14 244 } \
> e145242ea Dominik Brodowski 2018-04-09 245 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
> 1bd21c6c2 Dominik Brodowski 2018-04-05 246 #endif /* __SYSCALL_DEFINEx */
> 1a94bc347 Heiko Carstens 2009-01-14 247
>
> :::::: The code at line 233 was first introduced by commit
> :::::: 83460ec8dcac14142e7860a01fa59c267ac4657c syscalls.h: use gcc alias instead of assembler aliases for syscalls
>
> :::::: TO: Andi Kleen <ak@linux.intel.com>
> :::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
---end quoted text---
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 7:20 ` Christoph Hellwig
@ 2018-05-29 7:20 ` Greg Kroah-Hartman
2018-05-29 8:05 ` [kbuild-all] " Philip Li
0 siblings, 1 reply; 8+ messages in thread
From: Greg Kroah-Hartman @ 2018-05-29 7:20 UTC (permalink / raw)
To: Christoph Hellwig
Cc: kbuild test robot, kbuild-all, linux-fsdevel, Darrick J. Wong, viro, x86
On Tue, May 29, 2018 at 09:20:01AM +0200, Christoph Hellwig wrote:
> I'm not seeing anything like this in my i386 builds. Is this
> something new in gcc 8.1? Also it seems deeply hidden in the syscall
> macros, so I might need some help understanding those.
>
> On Tue, May 29, 2018 at 11:12:31AM +0800, kbuild test robot wrote:
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git hch.aio
> > head: 89b310a2b28dafbf3958e292785d51b7017da19e
> > commit: 7a074e96dee62586c935c80cecd931431bfdd0be [7/40] aio: implement io_pgetevents
> > config: i386-randconfig-c0-05290848 (attached as .config)
> > compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> > reproduce:
> > git checkout 7a074e96dee62586c935c80cecd931431bfdd0be
> > # save the attached .config to linux build tree
> > make ARCH=i386
> >
> > All warnings (new ones prefixed by >>):
> >
> > In file included from fs/aio.c:19:
> > include/linux/syscalls.h:233:18: warning: 'sys_io_setup' alias between functions of incompatible types 'long int(unsigned int, aio_context_t *)' and 'long int(long int, long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> > SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:238:18: note: aliased declaration here
> > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > ^~~~~~~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> > SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> > ^~~~~~~~~~~~~~~
> > >> include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> > SYSCALL_DEFINE6(io_pgetevents,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:238:18: note: aliased declaration here
> > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > ^~~~~~~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> > SYSCALL_DEFINE6(io_pgetevents,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:233:18: warning: 'sys_io_getevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *)' and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> > SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:238:18: note: aliased declaration here
> > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > ^~~~~~~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> > SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:233:18: warning: 'sys_io_cancel' alias between functions of incompatible types 'long int(aio_context_t, struct iocb *, struct io_event *)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:238:18: note: aliased declaration here
> > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > ^~~~~~~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:233:18: warning: 'sys_io_submit' alias between functions of incompatible types 'long int(aio_context_t, long int, struct iocb **)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:238:18: note: aliased declaration here
> > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > ^~~~~~~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~~~
> > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > ^~~~~~~~~~~~~~~
> > fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> > ^~~~~~~~~~~~~~~
> > include/linux/syscalls.h:233:18: warning: 'sys_io_destroy' alias between functions of incompatible types 'long int(aio_context_t)' and 'long int(long int)' [-Wattribute-alias]
> > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > ^~~
> > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
I was seeing this type of mess when trying to build with gcc-8.1, and
could not figure it out either. So I just gave up and went back to
gcc-7 for the time being. I don't think it's anything new you did here.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [kbuild-all] [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 7:20 ` Greg Kroah-Hartman
@ 2018-05-29 8:05 ` Philip Li
2018-05-29 11:29 ` Matthew Wilcox
0 siblings, 1 reply; 8+ messages in thread
From: Philip Li @ 2018-05-29 8:05 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Christoph Hellwig, kbuild test robot, Darrick J. Wong, x86, viro,
linux-fsdevel, kbuild-all
On Tue, May 29, 2018 at 09:20:24AM +0200, Greg Kroah-Hartman wrote:
> On Tue, May 29, 2018 at 09:20:01AM +0200, Christoph Hellwig wrote:
> > I'm not seeing anything like this in my i386 builds. Is this
> > something new in gcc 8.1? Also it seems deeply hidden in the syscall
> > macros, so I might need some help understanding those.
> >
> > On Tue, May 29, 2018 at 11:12:31AM +0800, kbuild test robot wrote:
> > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git hch.aio
> > > head: 89b310a2b28dafbf3958e292785d51b7017da19e
> > > commit: 7a074e96dee62586c935c80cecd931431bfdd0be [7/40] aio: implement io_pgetevents
> > > config: i386-randconfig-c0-05290848 (attached as .config)
> > > compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> > > reproduce:
> > > git checkout 7a074e96dee62586c935c80cecd931431bfdd0be
> > > # save the attached .config to linux build tree
> > > make ARCH=i386
> > >
> > > All warnings (new ones prefixed by >>):
> > >
> > > In file included from fs/aio.c:19:
> > > include/linux/syscalls.h:233:18: warning: 'sys_io_setup' alias between functions of incompatible types 'long int(unsigned int, aio_context_t *)' and 'long int(long int, long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> > > SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:238:18: note: aliased declaration here
> > > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > > ^~~~~~~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:212:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1322:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> > > SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
> > > ^~~~~~~~~~~~~~~
> > > >> include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> > > SYSCALL_DEFINE6(io_pgetevents,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:238:18: note: aliased declaration here
> > > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > > ^~~~~~~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:216:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1931:1: note: in expansion of macro 'SYSCALL_DEFINE6'
> > > SYSCALL_DEFINE6(io_pgetevents,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:233:18: warning: 'sys_io_getevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *)' and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> > > SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:238:18: note: aliased declaration here
> > > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > > ^~~~~~~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:215:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1913:1: note: in expansion of macro 'SYSCALL_DEFINE5'
> > > SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:233:18: warning: 'sys_io_cancel' alias between functions of incompatible types 'long int(aio_context_t, struct iocb *, struct io_event *)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > > SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:238:18: note: aliased declaration here
> > > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > > ^~~~~~~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1842:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > > SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:233:18: warning: 'sys_io_submit' alias between functions of incompatible types 'long int(aio_context_t, long int, struct iocb **)' and 'long int(long int, long int, long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > > SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:238:18: note: aliased declaration here
> > > asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> > > ^~~~~~~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> > > #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
> > > ^~~~~~~~~~~~~~~
> > > fs/aio.c:1767:1: note: in expansion of macro 'SYSCALL_DEFINE3'
> > > SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
> > > ^~~~~~~~~~~~~~~
> > > include/linux/syscalls.h:233:18: warning: 'sys_io_destroy' alias between functions of incompatible types 'long int(aio_context_t)' and 'long int(long int)' [-Wattribute-alias]
> > > asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> > > ^~~
> > > include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> > > __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
>
> I was seeing this type of mess when trying to build with gcc-8.1, and
> could not figure it out either. So I just gave up and went back to
> gcc-7 for the time being. I don't think it's anything new you did here.
thanks, we will follow up to exclude this pattern in report in bot side.
>
> thanks,
>
> greg k-h
> _______________________________________________
> kbuild-all mailing list
> kbuild-all@lists.01.org
> https://lists.01.org/mailman/listinfo/kbuild-all
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [kbuild-all] [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 8:05 ` [kbuild-all] " Philip Li
@ 2018-05-29 11:29 ` Matthew Wilcox
2018-05-29 13:00 ` Greg Kroah-Hartman
2018-05-29 14:58 ` Philip Li
0 siblings, 2 replies; 8+ messages in thread
From: Matthew Wilcox @ 2018-05-29 11:29 UTC (permalink / raw)
To: Philip Li
Cc: Greg Kroah-Hartman, Christoph Hellwig, kbuild test robot,
Darrick J. Wong, x86, viro, linux-fsdevel, kbuild-all
On Tue, May 29, 2018 at 04:05:07PM +0800, Philip Li wrote:
> On Tue, May 29, 2018 at 09:20:24AM +0200, Greg Kroah-Hartman wrote:
> > I was seeing this type of mess when trying to build with gcc-8.1, and
> > could not figure it out either. So I just gave up and went back to
> > gcc-7 for the time being. I don't think it's anything new you did here.
> thanks, we will follow up to exclude this pattern in report in bot side.
I don't think that's the right solution here. People just don't want
to see errors/warnings that they didn't introduce. It'd be unfortunate
to start skipping warnings about syscalls entirely.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [kbuild-all] [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 11:29 ` Matthew Wilcox
@ 2018-05-29 13:00 ` Greg Kroah-Hartman
2018-05-29 14:59 ` Philip Li
2018-05-29 14:58 ` Philip Li
1 sibling, 1 reply; 8+ messages in thread
From: Greg Kroah-Hartman @ 2018-05-29 13:00 UTC (permalink / raw)
To: Matthew Wilcox
Cc: Philip Li, Christoph Hellwig, kbuild test robot, Darrick J. Wong,
x86, viro, linux-fsdevel, kbuild-all
On Tue, May 29, 2018 at 04:29:31AM -0700, Matthew Wilcox wrote:
> On Tue, May 29, 2018 at 04:05:07PM +0800, Philip Li wrote:
> > On Tue, May 29, 2018 at 09:20:24AM +0200, Greg Kroah-Hartman wrote:
> > > I was seeing this type of mess when trying to build with gcc-8.1, and
> > > could not figure it out either. So I just gave up and went back to
> > > gcc-7 for the time being. I don't think it's anything new you did here.
> > thanks, we will follow up to exclude this pattern in report in bot side.
>
> I don't think that's the right solution here. People just don't want
> to see errors/warnings that they didn't introduce. It'd be unfortunate
> to start skipping warnings about syscalls entirely.
Can you build a kernel with gcc-8.1 right now? I sure can not, these
warnings are all over the place...
greg k-h
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [kbuild-all] [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 13:00 ` Greg Kroah-Hartman
@ 2018-05-29 14:59 ` Philip Li
0 siblings, 0 replies; 8+ messages in thread
From: Philip Li @ 2018-05-29 14:59 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Matthew Wilcox, Christoph Hellwig, kbuild test robot,
Darrick J. Wong, x86, viro, linux-fsdevel, kbuild-all
On Tue, May 29, 2018 at 03:00:59PM +0200, Greg Kroah-Hartman wrote:
> On Tue, May 29, 2018 at 04:29:31AM -0700, Matthew Wilcox wrote:
> > On Tue, May 29, 2018 at 04:05:07PM +0800, Philip Li wrote:
> > > On Tue, May 29, 2018 at 09:20:24AM +0200, Greg Kroah-Hartman wrote:
> > > > I was seeing this type of mess when trying to build with gcc-8.1, and
> > > > could not figure it out either. So I just gave up and went back to
> > > > gcc-7 for the time being. I don't think it's anything new you did here.
> > > thanks, we will follow up to exclude this pattern in report in bot side.
> >
> > I don't think that's the right solution here. People just don't want
> > to see errors/warnings that they didn't introduce. It'd be unfortunate
> > to start skipping warnings about syscalls entirely.
>
> Can you build a kernel with gcc-8.1 right now? I sure can not, these
> warnings are all over the place...
thanks for feedback, we will follow up to do more internal testing for gcc-8.1,
right now, will roll back to gcc-7.3.
>
> greg k-h
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [kbuild-all] [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)'
2018-05-29 11:29 ` Matthew Wilcox
2018-05-29 13:00 ` Greg Kroah-Hartman
@ 2018-05-29 14:58 ` Philip Li
1 sibling, 0 replies; 8+ messages in thread
From: Philip Li @ 2018-05-29 14:58 UTC (permalink / raw)
To: Matthew Wilcox
Cc: Greg Kroah-Hartman, Christoph Hellwig, kbuild test robot,
Darrick J. Wong, x86, viro, linux-fsdevel, kbuild-all
On Tue, May 29, 2018 at 04:29:31AM -0700, Matthew Wilcox wrote:
> On Tue, May 29, 2018 at 04:05:07PM +0800, Philip Li wrote:
> > On Tue, May 29, 2018 at 09:20:24AM +0200, Greg Kroah-Hartman wrote:
> > > I was seeing this type of mess when trying to build with gcc-8.1, and
> > > could not figure it out either. So I just gave up and went back to
> > > gcc-7 for the time being. I don't think it's anything new you did here.
> > thanks, we will follow up to exclude this pattern in report in bot side.
>
> I don't think that's the right solution here. People just don't want
> to see errors/warnings that they didn't introduce. It'd be unfortunate
> to start skipping warnings about syscalls entirely.
this is valid concern. Usually when using new compiler, we will need tune
the bot a little to exclude certain issues, some are input by users. Of
course, we will limit pattern to be very specific to avoid missing real
issues. Based on feedback, i will switch back to gcc-7.3, and does more
homework to understand the diffs of gcc-8.1.
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2018-05-29 14:49 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2018-05-29 3:12 [vfs:hch.aio 7/40] include/linux/syscalls.h:233:18: warning: 'sys_io_pgetevents' alias between functions of incompatible types 'long int(aio_context_t, long int, long int, struct io_event *, struct timespec *, const struct __aio_sigset *)' and 'long int(long int, long int, long int, long int, long int, long int)' kbuild test robot
2018-05-29 7:20 ` Christoph Hellwig
2018-05-29 7:20 ` Greg Kroah-Hartman
2018-05-29 8:05 ` [kbuild-all] " Philip Li
2018-05-29 11:29 ` Matthew Wilcox
2018-05-29 13:00 ` Greg Kroah-Hartman
2018-05-29 14:59 ` Philip Li
2018-05-29 14:58 ` Philip Li
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