diff options
Diffstat (limited to 'kernel/printk')
| -rw-r--r-- | kernel/printk/braille.c | 15 | ||||
| -rw-r--r-- | kernel/printk/printk.c | 40 |
2 files changed, 36 insertions, 19 deletions
diff --git a/kernel/printk/braille.c b/kernel/printk/braille.c index 1d21ebacfdb8..17a9591e54ff 100644 --- a/kernel/printk/braille.c +++ b/kernel/printk/braille.c @@ -11,11 +11,18 @@ int _braille_console_setup(char **str, char **brl_options) { - if (!strncmp(*str, "brl,", 4)) { + size_t len; + + len = str_has_prefix(*str, "brl,"); + if (len) { *brl_options = ""; - *str += 4; - } else if (!strncmp(*str, "brl=", 4)) { - *brl_options = *str + 4; + *str += len; + return 0; + } + + len = str_has_prefix(*str, "brl="); + if (len) { + *brl_options = *str + len; *str = strchr(*brl_options, ','); if (!*str) { pr_err("need port name after brl=\n"); diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 1888f6a3b694..fada22dc4ab6 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -118,19 +118,29 @@ static unsigned int __read_mostly devkmsg_log = DEVKMSG_LOG_MASK_DEFAULT; static int __control_devkmsg(char *str) { + size_t len; + if (!str) return -EINVAL; - if (!strncmp(str, "on", 2)) { + len = str_has_prefix(str, "on"); + if (len) { devkmsg_log = DEVKMSG_LOG_MASK_ON; - return 2; - } else if (!strncmp(str, "off", 3)) { + return len; + } + + len = str_has_prefix(str, "off"); + if (len) { devkmsg_log = DEVKMSG_LOG_MASK_OFF; - return 3; - } else if (!strncmp(str, "ratelimit", 9)) { + return len; + } + + len = str_has_prefix(str, "ratelimit"); + if (len) { devkmsg_log = DEVKMSG_LOG_MASK_DEFAULT; - return 9; + return len; } + return -EINVAL; } @@ -238,7 +248,7 @@ static void __up_console_sem(unsigned long ip) { unsigned long flags; - mutex_release(&console_lock_dep_map, 1, ip); + mutex_release(&console_lock_dep_map, ip); printk_safe_enter_irqsave(flags); up(&console_sem); @@ -1669,20 +1679,20 @@ static int console_lock_spinning_disable_and_check(void) raw_spin_unlock(&console_owner_lock); if (!waiter) { - spin_release(&console_owner_dep_map, 1, _THIS_IP_); + spin_release(&console_owner_dep_map, _THIS_IP_); return 0; } /* The waiter is now free to continue */ WRITE_ONCE(console_waiter, false); - spin_release(&console_owner_dep_map, 1, _THIS_IP_); + spin_release(&console_owner_dep_map, _THIS_IP_); /* * Hand off console_lock to waiter. The waiter will perform * the up(). After this, the waiter is the console_lock owner. */ - mutex_release(&console_lock_dep_map, 1, _THIS_IP_); + mutex_release(&console_lock_dep_map, _THIS_IP_); return 1; } @@ -1736,7 +1746,7 @@ static int console_trylock_spinning(void) /* Owner will clear console_waiter on hand off */ while (READ_ONCE(console_waiter)) cpu_relax(); - spin_release(&console_owner_dep_map, 1, _THIS_IP_); + spin_release(&console_owner_dep_map, _THIS_IP_); printk_safe_exit_irqrestore(flags); /* @@ -2760,8 +2770,6 @@ void register_console(struct console *newcon) * for us. */ logbuf_lock_irqsave(flags); - console_seq = syslog_seq; - console_idx = syslog_idx; /* * We're about to replay the log buffer. Only do this to the * just-registered console to avoid excessive message spam to @@ -2773,6 +2781,8 @@ void register_console(struct console *newcon) */ exclusive_console = newcon; exclusive_console_stop_seq = console_seq; + console_seq = syslog_seq; + console_idx = syslog_idx; logbuf_unlock_irqrestore(flags); } console_unlock(); @@ -2951,7 +2961,7 @@ static void wake_up_klogd_work_func(struct irq_work *irq_work) static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = { .func = wake_up_klogd_work_func, - .flags = IRQ_WORK_LAZY, + .flags = ATOMIC_INIT(IRQ_WORK_LAZY), }; void wake_up_klogd(void) @@ -3274,7 +3284,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog, /* move first record forward until length fits into the buffer */ seq = dumper->cur_seq; idx = dumper->cur_idx; - while (l > size && seq < dumper->next_seq) { + while (l >= size && seq < dumper->next_seq) { struct printk_log *msg = log_from_idx(idx); l -= msg_print_text(msg, true, time, NULL, 0); |
