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Revert "printk: make sure to print log on console." 

This reverts commit 375899cddc.

The visibility of early messages did not longer take into account
"quiet", "debug", and "loglevel" early parameters.

It would be possible to invalidate and recompute LOG_NOCONS flag
for the affected messages. But it would be hairy.

Instead this patch just reverts the problematic commit. We could
come up with a better solution for the original problem. For example,
we could simplify the logic and just mark messages that should always
be visible or always invisible on the console.

Also this patch reverts the related build fix commit ffaa619af1
("printk: Fix warning about unused suppress_message_printing").

Finally, this patch does not put back the unused LOG_NOCONS flag.

Link: http://lkml.kernel.org/r/20180910145747.emvfzv4mzlk5dfqk@pathway.suse.cz
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Maninder Singh <maninder1.s@samsung.com>
Reported-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Petr Mladek 2018-09-10 15:52:06 +02:00
parent 9f68cb5791
commit a6ae928c25
1 changed files with 5 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/printk/printk.c
View File

@ -349,7 +349,6 @@ static int console_msg_format = MSG_FORMAT_DEFAULT;
*/
enum log_flags {
LOG_NOCONS = 1, /* suppress print, do not print to console */
LOG_NEWLINE = 2, /* text ended with a newline */
LOG_PREFIX = 4, /* text started with a prefix */
LOG_CONT = 8, /* text is a fragment of a continuation line */
@ -1879,9 +1878,6 @@ int vprintk_store(int facility, int level,
if (dict)
lflags |= LOG_PREFIX|LOG_NEWLINE;
if (suppress_message_printing(level))
lflags |= LOG_NOCONS;
return log_output(facility, level, lflags,
dict, dictlen, text, text_len);
}
@ -2030,6 +2026,7 @@ static void call_console_drivers(const char *ext_text, size_t ext_len,
const char *text, size_t len) {}
static size_t msg_print_text(const struct printk_log *msg,
bool syslog, char *buf, size_t size) { return 0; }
static bool suppress_message_printing(int level) { return false; }
#endif /* CONFIG_PRINTK */
@ -2365,10 +2362,11 @@ void console_unlock(void)
break;
msg = log_from_idx(console_idx);
if (msg->flags & LOG_NOCONS) {
if (suppress_message_printing(msg->level)) {
/*
* Skip record if !ignore_loglevel, and
* record has level above the console loglevel.
* Skip record we have buffered and already printed
* directly to the console when we received it, and
* record that has level above the console loglevel.
*/
console_idx = log_next(console_idx);
console_seq++;