Re: [PATCH] seqlock: <linux/seqlock.h>: fix multiple kernel-doc warnings

From: kernel test robot
Date: Sun Aug 16 2020 - 19:40:09 EST

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In reply to: Randy Dunlap: "[PATCH] seqlock: <linux/seqlock.h>: fix multiple kernel-doc warnings"
Next in thread: kernel test robot: "Re: [PATCH] seqlock: <linux/seqlock.h>: fix multiple kernel-doc warnings"
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Hi Randy,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.9-rc1 next-20200814]
[cannot apply to tip/locking/core linux/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Randy-Dunlap/seqlock-linux-seqlock-h-fix-multiple-kernel-doc-warnings/20200817-062836
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9123e3a74ec7b934a4a099e98af6a61c2f80bbf5
config: s390-randconfig-r025-20200817 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e)
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
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390

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 arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:156:8: error: 'inline' can only appear on functions
static __always_inline void \
^
include/linux/compiler_attributes.h:70:41: note: expanded from macro '__always_inline'
#define __always_inline inline __attribute__((__always_inline__))
^
include/linux/compiler_types.h:144:16: note: expanded from macro 'inline'
#define inline inline __gnu_inline __inline_maybe_unused notrace
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:156:8: warning: '__gnu_inline__' attribute only applies to functions [-Wignored-attributes]
include/linux/compiler_attributes.h:70:41: note: expanded from macro '__always_inline'
#define __always_inline inline __attribute__((__always_inline__))
^
include/linux/compiler_types.h:144:23: note: expanded from macro 'inline'
#define inline inline __gnu_inline __inline_maybe_unused notrace
^
include/linux/compiler_attributes.h:167:56: note: expanded from macro '__gnu_inline'
#define __gnu_inline __attribute__((__gnu_inline__))
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
>> include/linux/seqlock.h:156:8: warning: '__no_instrument_function__' attribute only applies to functions [-Wignored-attributes]
include/linux/compiler_attributes.h:70:41: note: expanded from macro '__always_inline'
#define __always_inline inline __attribute__((__always_inline__))
^
include/linux/compiler_types.h:144:58: note: expanded from macro 'inline'
#define inline inline __gnu_inline __inline_maybe_unused notrace
^
include/linux/compiler_types.h:124:34: note: expanded from macro 'notrace'
#define notrace __attribute__((__no_instrument_function__))
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:156:8: warning: '__always_inline__' attribute only applies to functions [-Wignored-attributes]
include/linux/compiler_attributes.h:70:63: note: expanded from macro '__always_inline'
#define __always_inline inline __attribute__((__always_inline__))
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:156:34: error: variable has incomplete type 'void'
static __always_inline void \
^
include/linux/seqlock.h:157:10: error: expected ';' after top level declarator
seqcount_##lockname##_init(seqcount_##lockname##_t *s, locktype *lock) \
^
;
include/linux/seqlock.h:213:1: error: unknown type name 'seqcount_raw_spinlock_t'
SEQCOUNT_LOCKTYPE(raw_spinlock_t, raw_spinlock, false, s->lock)
^
include/linux/seqlock.h:177:29: note: expanded from macro 'SEQCOUNT_LOCKTYPE'
__seqcount_##lockname##_ptr(seqcount_##lockname##_t *s) \
^
<scratch space>:28:1: note: expanded from here
seqcount_raw_spinlock_t
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:213:1: error: unknown type name 'seqcount_raw_spinlock_t'
include/linux/seqlock.h:183:37: note: expanded from macro 'SEQCOUNT_LOCKTYPE'
__seqcount_##lockname##_preemptible(seqcount_##lockname##_t *s) \
^
<scratch space>:32:1: note: expanded from here
seqcount_raw_spinlock_t
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:213:1: error: unknown type name 'seqcount_raw_spinlock_t'
include/linux/seqlock.h:189:32: note: expanded from macro 'SEQCOUNT_LOCKTYPE'
__seqcount_##lockname##_assert(seqcount_##lockname##_t *s) \
^
<scratch space>:36:1: note: expanded from here
seqcount_raw_spinlock_t
^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:12:
In file included from include/linux/sched.h:20:
In file included from include/linux/hrtimer.h:20:
include/linux/seqlock.h:751:17: error: implicit declaration of function '__seqcount_ptr' [-Werror,-Wimplicit-function-declaration]
unsigned ret = read_seqcount_begin(&sl->seqcount);
^
include/linux/seqlock.h:306:24: note: expanded from macro 'read_seqcount_begin'
read_seqcount_t_begin(__seqcount_ptr(s))
^
include/linux/seqlock.h:248:28: note: expanded from macro '__seqcount_ptr'
#define __seqcount_ptr(s) __seqprop(s, ptr)
^
include/linux/seqlock.h:241:15: note: expanded from macro '__seqprop'
seqcount_t: __seqcount_##prop((void *)(s)), \
^
<scratch space>:129:1: note: expanded from here
__seqcount_ptr
^
include/linux/seqlock.h:751:17: note: did you mean '__seqcount_init'?
include/linux/seqlock.h:306:24: note: expanded from macro 'read_seqcount_begin'
read_seqcount_t_begin(__seqcount_ptr(s))
^
include/linux/seqlock.h:248:28: note: expanded from macro '__seqcount_ptr'
#define __seqcount_ptr(s) __seqprop(s, ptr)
^
include/linux/seqlock.h:241:15: note: expanded from macro '__seqprop'
seqcount_t: __seqcount_##prop((void *)(s)), \
^
<scratch space>:129:1: note: expanded from here
__seqcount_ptr
^
include/linux/seqlock.h:71:20: note: '__seqcount_init' declared here
static inline void __seqcount_init(seqcount_t *s, const char *name,
^
include/linux/seqlock.h:751:17: error: unknown type name 'seqcount_raw_spinlock_t'; did you mean 'seqcount_spinlock_t'?
unsigned ret = read_seqcount_begin(&sl->seqcount);
^
include/linux/seqlock.h:306:24: note: expanded from macro 'read_seqcount_begin'
read_seqcount_t_begin(__seqcount_ptr(s))
^

# https://github.com/0day-ci/linux/commit/360da27b2632939e5188f48d211b8a39cfdb8cde
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Randy-Dunlap/seqlock-linux-seqlock-h-fix-multiple-kernel-doc-warnings/20200817-062836
git checkout 360da27b2632939e5188f48d211b8a39cfdb8cde
vim +/__no_instrument_function__ +156 include/linux/seqlock.h

139
140 /**
141 * typedef seqcount_LOCKNAME_t - sequence counter with LOCKTYPE associated
142 * @seqcount: The real sequence counter
143 * @lock: Pointer to the associated spinlock
144 *
145 * A plain sequence counter with external writer synchronization by a
146 * spinlock. The spinlock is associated to the sequence count in the
147 * static initializer or init function. This enables lockdep to validate
148 * that the write side critical section is properly serialized.
149 */
150
151 /*
152 * seqcount_LOCKNAME_init() - runtime initializer for seqcount_LOCKNAME_t
153 * @s: Pointer to the seqcount_LOCKNAME_t instance
154 * @lock: Pointer to the associated LOCKTYPE
155 */
> 156 static __always_inline void \
157 seqcount_##lockname##_init(seqcount_##lockname##_t *s, locktype *lock) \
158 { \
159 seqcount_init(&s->seqcount); \
160 __SEQ_LOCK(s->lock = lock); \
161 } \
162

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

Attachment: .config.gz
Description: application/gzip

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In reply to: Randy Dunlap: "[PATCH] seqlock: <linux/seqlock.h>: fix multiple kernel-doc warnings"
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