[rcu:rcu/next 55/57] include/linux/printk.h:297:35: note: in expansion of macro 'READ_ONCE'

From: kbuild test robot
Date: Sat Mar 25 2017 - 21:14:19 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head: cfc71fb0749122b29a70646a9a9522003418e5dc
commit: 7cf53ca0469972c1b953b68eb6a42e5d4fe75ef4 [55/57] srcutorture: Print Tiny SRCU reader statistics
config: xtensa-allmodconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 7cf53ca0469972c1b953b68eb6a42e5d4fe75ef4
# save the attached .config to linux build tree
make.cross ARCH=xtensa

All warnings (new ones prefixed by >>):

In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from kernel/rcu/rcutorture.c:25:
kernel/rcu/rcutorture.c: In function 'srcu_torture_stats':
>> include/linux/compiler.h:316:8: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'int' [-Wformat=]
union { typeof(x) __val; char __c[1]; } __u; \
^
include/linux/compiler.h:323:22: note: in expansion of macro '__READ_ONCE'
#define READ_ONCE(x) __READ_ONCE(x, 1)
^
>> include/linux/printk.h:297:35: note: in expansion of macro 'READ_ONCE'
printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
^
kernel/rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
^
include/linux/compiler.h:316:8: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'int' [-Wformat=]
union { typeof(x) __val; char __c[1]; } __u; \
^
include/linux/compiler.h:323:22: note: in expansion of macro '__READ_ONCE'
#define READ_ONCE(x) __READ_ONCE(x, 1)
^
>> include/linux/printk.h:297:35: note: in expansion of macro 'READ_ONCE'
printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
^
kernel/rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
^
--
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from kernel//rcu/rcutorture.c:25:
kernel//rcu/rcutorture.c: In function 'srcu_torture_stats':
>> include/linux/compiler.h:316:8: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'int' [-Wformat=]
union { typeof(x) __val; char __c[1]; } __u; \
^
include/linux/compiler.h:323:22: note: in expansion of macro '__READ_ONCE'
#define READ_ONCE(x) __READ_ONCE(x, 1)
^
>> include/linux/printk.h:297:35: note: in expansion of macro 'READ_ONCE'
printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
^
kernel//rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
^
include/linux/compiler.h:316:8: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'int' [-Wformat=]
union { typeof(x) __val; char __c[1]; } __u; \
^
include/linux/compiler.h:323:22: note: in expansion of macro '__READ_ONCE'
#define READ_ONCE(x) __READ_ONCE(x, 1)
^
>> include/linux/printk.h:297:35: note: in expansion of macro 'READ_ONCE'
printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
^
kernel//rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
^

vim +/READ_ONCE +297 include/linux/printk.h

968ab183 Linus Torvalds 2010-11-15 281
b6c035d0 Andi Kleen 2013-08-05 282 extern asmlinkage void dump_stack(void) __cold;
968ab183 Linus Torvalds 2010-11-15 283
968ab183 Linus Torvalds 2010-11-15 284 #ifndef pr_fmt
968ab183 Linus Torvalds 2010-11-15 285 #define pr_fmt(fmt) fmt
968ab183 Linus Torvalds 2010-11-15 286 #endif
968ab183 Linus Torvalds 2010-11-15 287
6e099f55 Dan Streetman 2014-06-04 288 /*
6e099f55 Dan Streetman 2014-06-04 289 * These can be used to print at the various log levels.
6e099f55 Dan Streetman 2014-06-04 290 * All of these will print unconditionally, although note that pr_debug()
6e099f55 Dan Streetman 2014-06-04 291 * and other debug macros are compiled out unless either DEBUG is defined
6e099f55 Dan Streetman 2014-06-04 292 * or CONFIG_DYNAMIC_DEBUG is set.
6e099f55 Dan Streetman 2014-06-04 293 */
a0cba217 Linus Torvalds 2016-08-09 294 #define pr_emerg(fmt, ...) \
a0cba217 Linus Torvalds 2016-08-09 295 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
a0cba217 Linus Torvalds 2016-08-09 296 #define pr_alert(fmt, ...) \
a0cba217 Linus Torvalds 2016-08-09 @297 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
a0cba217 Linus Torvalds 2016-08-09 298 #define pr_crit(fmt, ...) \
a0cba217 Linus Torvalds 2016-08-09 299 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
a0cba217 Linus Torvalds 2016-08-09 300 #define pr_err(fmt, ...) \
a0cba217 Linus Torvalds 2016-08-09 301 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
a0cba217 Linus Torvalds 2016-08-09 302 #define pr_warning(fmt, ...) \
a0cba217 Linus Torvalds 2016-08-09 303 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
a0cba217 Linus Torvalds 2016-08-09 304 #define pr_warn pr_warning
a0cba217 Linus Torvalds 2016-08-09 305 #define pr_notice(fmt, ...) \

:::::: The code at line 297 was first introduced by commit
:::::: a0cba2179ea4c1820fce2ee046b6ed90ecc56196 Revert "printk: create pr_<level> functions"

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

Attachment: .config.gz
Description: application/gzip