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Subject[linux-rt-devel:linux-5.13.y-rt-rebase 14/222] kernel/printk/printk.c:3633:17: error: implicit declaration of function 'read_console_seq'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.13.y-rt-rebase
head: 7e175e6b59975c8901ad370f7818937f68de45c1
commit: 63cf1e4b564a46ec7bee5571cff518c70355dbdf [14/222] printk: add pr_flush()
config: powerpc64-randconfig-r003-20210708 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe)
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 powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=63cf1e4b564a46ec7bee5571cff518c70355dbdf
git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
git fetch --no-tags linux-rt-devel linux-5.13.y-rt-rebase
git checkout 63cf1e4b564a46ec7bee5571cff518c70355dbdf
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64

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

All errors (new ones prefixed by >>):

In file included from kernel/printk/printk.c:22:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:32:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
^
<built-in>:310:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
kernel/printk/printk.c:178:5: warning: no previous prototype for function 'devkmsg_sysctl_set_loglvl' [-Wmissing-prototypes]
int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
^
kernel/printk/printk.c:178:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
^
static
kernel/printk/printk.c:2674:4: error: implicit declaration of function 'latched_seq_write' [-Werror,-Wimplicit-function-declaration]
latched_seq_write(&c->printk_seq, seq);
^
kernel/printk/printk.c:2907:2: error: implicit declaration of function 'latched_seq_write' [-Werror,-Wimplicit-function-declaration]
latched_seq_write(&newcon->printk_seq, seq);
^
>> kernel/printk/printk.c:3633:17: error: implicit declaration of function 'read_console_seq' [-Werror,-Wimplicit-function-declaration]
printk_seq = read_console_seq(con);
^
kernel/printk/printk.c:3633:17: note: did you mean '__up_console_sem'?
kernel/printk/printk.c:238:13: note: '__up_console_sem' declared here
static void __up_console_sem(unsigned long ip)
^
2 warnings and 3 errors generated.


vim +/read_console_seq +3633 kernel/printk/printk.c

3597
3598 /**
3599 * pr_flush() - Wait for printing threads to catch up.
3600 *
3601 * @timeout_ms: The maximum time (in ms) to wait.
3602 * @reset_on_progress: Reset the timeout if forward progress is seen.
3603 *
3604 * A value of 0 for @timeout_ms means no waiting will occur. A value of -1
3605 * represents infinite waiting.
3606 *
3607 * If @reset_on_progress is true, the timeout will be reset whenever any
3608 * printer has been seen to make some forward progress.
3609 *
3610 * Context: Any context.
3611 * Return: true if all enabled printers are caught up.
3612 */
3613 bool pr_flush(int timeout_ms, bool reset_on_progress)
3614 {
3615 int remaining = timeout_ms;
3616 struct console *con;
3617 u64 last_diff = 0;
3618 bool may_sleep;
3619 u64 printk_seq;
3620 u64 diff;
3621 u64 seq;
3622
3623 may_sleep = (preemptible() && !in_softirq());
3624
3625 seq = prb_next_seq(prb);
3626
3627 for (;;) {
3628 diff = 0;
3629
3630 for_each_console(con) {
3631 if (!(con->flags & CON_ENABLED))
3632 continue;
> 3633 printk_seq = read_console_seq(con);

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