[jolsa-perf:bpf/kprobe_multi_4 3/11] include/linux/trace_events.h:784:42: warning: declaration of 'union bpf_attr' will not be visible outside of this function

From: kernel test robot
Date: Wed Mar 09 2022 - 19:05:54 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/kprobe_multi_4
head: 02731d567ee31d7c7f012e9c5930f114ed1e2478
commit: c330e21ba4633cb075ce0c4c5f936b16ed722666 [3/11] bpf: Add multi kprobe link
config: s390-buildonly-randconfig-r001-20220309 (https://download.01.org/0day-ci/archive/20220310/202203100814.ubrhuffY-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6)
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 s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=c330e21ba4633cb075ce0c4c5f936b16ed722666
git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
git fetch --no-tags jolsa-perf bpf/kprobe_multi_4
git checkout c330e21ba4633cb075ce0c4c5f936b16ed722666
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash kernel/trace/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from kernel/trace/ftrace.c:18:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from kernel/trace/ftrace.c:18:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from kernel/trace/ftrace.c:18:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
In file included from kernel/trace/ftrace.c:45:
In file included from kernel/trace/trace_output.h:6:
In file included from kernel/trace/trace.h:17:
>> include/linux/trace_events.h:784:42: warning: declaration of 'union bpf_attr' will not be visible outside of this function [-Wvisibility]
bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
^
kernel/trace/ftrace.c:297:5: warning: no previous prototype for function '__register_ftrace_function' [-Wmissing-prototypes]
int __register_ftrace_function(struct ftrace_ops *ops)
^
kernel/trace/ftrace.c:297:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int __register_ftrace_function(struct ftrace_ops *ops)
^
static
kernel/trace/ftrace.c:340:5: warning: no previous prototype for function '__unregister_ftrace_function' [-Wmissing-prototypes]
int __unregister_ftrace_function(struct ftrace_ops *ops)
^
kernel/trace/ftrace.c:340:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int __unregister_ftrace_function(struct ftrace_ops *ops)
^
static
kernel/trace/ftrace.c:3905:15: warning: no previous prototype for function 'arch_ftrace_match_adjust' [-Wmissing-prototypes]
char * __weak arch_ftrace_match_adjust(char *str, const char *search)
^
kernel/trace/ftrace.c:3905:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
char * __weak arch_ftrace_match_adjust(char *str, const char *search)
^
static
kernel/trace/ftrace.c:3108:1: warning: unused function 'ops_references_rec' [-Wunused-function]
ops_references_rec(struct ftrace_ops *ops, struct dyn_ftrace *rec)
^
17 warnings generated.
--
In file included from kernel/trace/ring_buffer.c:8:
>> include/linux/trace_events.h:784:42: warning: declaration of 'union bpf_attr' will not be visible outside of this function [-Wvisibility]
bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
^
In file included from kernel/trace/ring_buffer.c:7:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:9:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:6:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: expected absolute expression
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:62:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
".if " len " > 254\n" \
^
<inline asm>:5:5: note: instantiated into assembly here
.if 6651b-6641b > 254
^
In file included from kernel/trace/ring_buffer.c:7:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:9:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:6:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: cpu alternatives does not support instructions blocks > 254 bytes
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:63:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
"\t.error \"cpu alternatives does not support instructions " \
^
<inline asm>:6:2: note: instantiated into assembly here
.error "cpu alternatives does not support instructions blocks > 254 bytes"
^
In file included from kernel/trace/ring_buffer.c:7:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:9:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:6:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: expected absolute expression
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:66:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
".if (" len ") %% 2\n" \
^
<inline asm>:8:5: note: instantiated into assembly here
.if (6651b-6641b) % 2
^
In file included from kernel/trace/ring_buffer.c:7:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:9:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:6:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: cpu alternatives instructions length is odd
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:67:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
"\t.error \"cpu alternatives instructions length is odd\"\n" \
^
<inline asm>:9:2: note: instantiated into assembly here
.error "cpu alternatives instructions length is odd"
^
In file included from kernel/trace/ring_buffer.c:7:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:9:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:6:
--
In file included from kernel/trace/trace.c:53:
In file included from kernel/trace/trace.h:9:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from kernel/trace/trace.c:53:
In file included from kernel/trace/trace.h:9:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from kernel/trace/trace.c:53:
In file included from kernel/trace/trace.h:9:
In file included from include/linux/clocksource.h:22:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
In file included from kernel/trace/trace.c:53:
In file included from kernel/trace/trace.h:17:
>> include/linux/trace_events.h:784:42: warning: declaration of 'union bpf_attr' will not be visible outside of this function [-Wvisibility]
bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
^
In file included from kernel/trace/trace.c:15:
In file included from include/linux/ring_buffer.h:5:
In file included from include/linux/mm.h:10:
In file included from include/linux/gfp.h:6:
In file included from include/linux/mmzone.h:8:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: expected absolute expression
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:62:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
".if " len " > 254\n" \
^
<inline asm>:5:5: note: instantiated into assembly here
.if 6651b-6641b > 254
^
In file included from kernel/trace/trace.c:15:
In file included from include/linux/ring_buffer.h:5:
In file included from include/linux/mm.h:10:
In file included from include/linux/gfp.h:6:
In file included from include/linux/mmzone.h:8:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: cpu alternatives does not support instructions blocks > 254 bytes
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:63:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
"\t.error \"cpu alternatives does not support instructions " \
^
<inline asm>:6:2: note: instantiated into assembly here
.error "cpu alternatives does not support instructions blocks > 254 bytes"
^
In file included from kernel/trace/trace.c:15:
In file included from include/linux/ring_buffer.h:5:
In file included from include/linux/mm.h:10:
In file included from include/linux/gfp.h:6:
In file included from include/linux/mmzone.h:8:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: expected absolute expression
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:66:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
".if (" len ") %% 2\n" \
^
<inline asm>:8:5: note: instantiated into assembly here
.if (6651b-6641b) % 2
^
In file included from kernel/trace/trace.c:15:
In file included from include/linux/ring_buffer.h:5:
In file included from include/linux/mm.h:10:
In file included from include/linux/gfp.h:6:
In file included from include/linux/mmzone.h:8:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: cpu alternatives instructions length is odd
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
ALTINSTR_REPLACEMENT(altinstr, 1) \
^
arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
^
arch/s390/include/asm/alternative.h:67:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
"\t.error \"cpu alternatives instructions length is odd\"\n" \
^
<inline asm>:9:2: note: instantiated into assembly here
.error "cpu alternatives instructions length is odd"
^
In file included from kernel/trace/trace.c:15:
In file included from include/linux/ring_buffer.h:5:
In file included from include/linux/mm.h:10:
In file included from include/linux/gfp.h:6:
In file included from include/linux/mmzone.h:8:
In file included from include/linux/spinlock.h:93:
arch/s390/include/asm/spinlock.h:81:3: error: expected absolute expression
ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
^
arch/s390/include/asm/alternative.h:113:2: note: expanded from macro 'ALTERNATIVE'
OLDINSTR(oldinstr, 1) \
^
arch/s390/include/asm/alternative.h:83:2: note: expanded from macro 'OLDINSTR'
OLDINSTR_PADDING(oldinstr, num) \
..

vim +784 include/linux/trace_events.h

755
756 static inline int
757 perf_event_query_prog_array(struct perf_event *event, void __user *info)
758 {
759 return -EOPNOTSUPP;
760 }
761 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
762 {
763 return -EOPNOTSUPP;
764 }
765 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
766 {
767 return -EOPNOTSUPP;
768 }
769 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
770 {
771 return NULL;
772 }
773 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
774 {
775 }
776 static inline int bpf_get_perf_event_info(const struct perf_event *event,
777 u32 *prog_id, u32 *fd_type,
778 const char **buf, u64 *probe_offset,
779 u64 *probe_addr)
780 {
781 return -EOPNOTSUPP;
782 }
783 static inline int
> 784 bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
785 {
786 return -EOPNOTSUPP;
787 }
788 #endif
789

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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