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Date: Fri, 9 May 2014 11:10:57 +0200
From: Petr Mladek <pmladek@...e.cz>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Dave Anderson <anderson@...hat.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Kay Sievers <kay@...y.org>, Jiri Kosina <jkosina@...e.cz>,
Michal Hocko <mhocko@...e.cz>, Jan Kara <jack@...e.cz>,
linux-kernel@...r.kernel.org, Petr Mladek <pmladek@...e.cz>
Subject: [RFC PATCH 03/11] printk: rename "logbuf_lock" to "main_logbuf_lock"
Make the naming consistent with the "main_log" and "main_cont".
This commit does not change the behavior.
Signed-off-by: Petr Mladek <pmladek@...e.cz>
---
kernel/printk/printk.c | 98 +++++++++++++++++++++++++-------------------------
1 file changed, 49 insertions(+), 49 deletions(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index c560ebdecc04..d64533f9e6b2 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -148,11 +148,11 @@ EXPORT_SYMBOL(console_set_on_cmdline);
static int console_may_schedule;
/*
- * The logbuf_lock protects kmsg buffer, indexes, counters. This can be taken
- * within the scheduler's rq lock. It must be released before calling
+ * The main_logbuf_lock protects kmsg buffer, indexes, counters. This can be
+ * taken within the scheduler's rq lock. It must be released before calling
* console_unlock() or anything else that might wake up a process.
*/
-static DEFINE_RAW_SPINLOCK(logbuf_lock);
+static DEFINE_RAW_SPINLOCK(main_logbuf_lock);
/*
* The printk log buffer consists of a chain of concatenated variable
@@ -691,21 +691,21 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
ret = mutex_lock_interruptible(&user->lock);
if (ret)
return ret;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
while (user->seq == get_next_seq(&main_log)) {
if (file->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
goto out;
}
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
ret = wait_event_interruptible(log_wait,
user->seq !=
get_next_seq(&main_log));
if (ret)
goto out;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
}
if (user->seq < get_first_seq(&main_log)) {
@@ -713,7 +713,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
user->idx = get_first_idx(&main_log);
user->seq = get_first_seq(&main_log);
ret = -EPIPE;
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
goto out;
}
@@ -780,7 +780,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
user->idx = inc_idx(&main_log, user->idx);
user->seq++;
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
if (len > count) {
ret = -EINVAL;
@@ -807,7 +807,7 @@ static loff_t devkmsg_llseek(struct file *file, loff_t offset, int whence)
if (offset)
return -ESPIPE;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
switch (whence) {
case SEEK_SET:
/* the first record */
@@ -831,7 +831,7 @@ static loff_t devkmsg_llseek(struct file *file, loff_t offset, int whence)
default:
ret = -EINVAL;
}
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
return ret;
}
@@ -845,7 +845,7 @@ static unsigned int devkmsg_poll(struct file *file, poll_table *wait)
poll_wait(file, &log_wait, wait);
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
if (user->seq < get_next_seq(&main_log)) {
/* return error when data has vanished underneath us */
if (user->seq < get_first_seq(&main_log))
@@ -853,7 +853,7 @@ static unsigned int devkmsg_poll(struct file *file, poll_table *wait)
else
ret = POLLIN|POLLRDNORM;
}
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
return ret;
}
@@ -878,10 +878,10 @@ static int devkmsg_open(struct inode *inode, struct file *file)
mutex_init(&user->lock);
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
user->idx = get_first_idx(&main_log);
user->seq = get_first_seq(&main_log);
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
file->private_data = user;
return 0;
@@ -977,13 +977,13 @@ void __init setup_log_buf(int early)
return;
}
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
main_log.buf_len = new_log_buf_len;
main_log.buf = new_log_buf;
new_log_buf_len = 0;
free = __LOG_BUF_LEN - get_next_idx(&main_log);
memcpy(main_log.buf, __log_buf, __LOG_BUF_LEN);
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
pr_info("log_buf_len: %d\n", main_log.buf_len);
pr_info("early log buf free: %d(%d%%)\n",
@@ -1179,7 +1179,7 @@ static int syslog_print(char __user *buf, int size)
size_t n;
size_t skip;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
if (syslog_seq < get_first_seq(&main_log)) {
/* messages are gone, move to first one */
syslog_seq = get_first_seq(&main_log);
@@ -1188,7 +1188,7 @@ static int syslog_print(char __user *buf, int size)
syslog_partial = 0;
}
if (syslog_seq == get_next_seq(&main_log)) {
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
break;
}
@@ -1209,7 +1209,7 @@ static int syslog_print(char __user *buf, int size)
syslog_partial += n;
} else
n = 0;
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
if (!n)
break;
@@ -1238,7 +1238,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
if (!text)
return -ENOMEM;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
if (buf) {
u64 next_seq;
u64 seq;
@@ -1298,12 +1298,12 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
seq++;
prev = msg->flags;
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
if (copy_to_user(buf + len, text, textlen))
len = -EFAULT;
else
len += textlen;
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
if (seq < get_first_seq(&main_log)) {
/* messages are gone, move to next one */
@@ -1318,7 +1318,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
clear_seq = get_next_seq(&main_log);
clear_idx = get_next_idx(&main_log);
}
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
kfree(text);
return len;
@@ -1410,7 +1410,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
break;
/* Number of chars in the log buffer */
case SYSLOG_ACTION_SIZE_UNREAD:
- raw_spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&main_logbuf_lock);
if (syslog_seq < get_first_seq(&main_log)) {
/* messages are gone, move to first one */
syslog_seq = get_first_seq(&main_log);
@@ -1443,7 +1443,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
}
error -= syslog_partial;
}
- raw_spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&main_logbuf_lock);
break;
/* Size of the log buffer */
case SYSLOG_ACTION_SIZE_BUFFER:
@@ -1509,7 +1509,7 @@ static void zap_locks(void)
debug_locks_off();
/* If a crash is occurring, make sure we can't deadlock */
- raw_spin_lock_init(&logbuf_lock);
+ raw_spin_lock_init(&main_logbuf_lock);
/* And make sure that we print immediately */
sema_init(&console_sem, 1);
}
@@ -1726,7 +1726,7 @@ asmlinkage int vprintk_emit(int facility, int level,
}
lockdep_off();
- raw_spin_lock(&logbuf_lock);
+ raw_spin_lock(&main_logbuf_lock);
logbuf_cpu = this_cpu;
if (recursion_bug) {
@@ -1829,7 +1829,7 @@ asmlinkage int vprintk_emit(int facility, int level,
}
logbuf_cpu = UINT_MAX;
- raw_spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&main_logbuf_lock);
lockdep_on();
local_irq_restore(flags);
@@ -2206,7 +2206,7 @@ static void console_cont_flush(char *text, size_t size)
unsigned long flags;
size_t len;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
if (!main_cont.len)
goto out;
@@ -2220,14 +2220,14 @@ static void console_cont_flush(char *text, size_t size)
goto out;
len = cont_print_text(text, size);
- raw_spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&main_logbuf_lock);
stop_critical_timings();
call_console_drivers(main_cont.level, text, len);
start_critical_timings();
local_irq_restore(flags);
return;
out:
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
}
/**
@@ -2268,7 +2268,7 @@ again:
size_t len;
int level;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
console_end_seq = get_next_seq(&main_log);
again_noirq:
if (seen_seq != get_next_seq(&main_log)) {
@@ -2316,14 +2316,14 @@ skip:
console_idx = inc_idx(&main_log, console_idx);
console_seq++;
console_prev = msg->flags;
- raw_spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&main_logbuf_lock);
stop_critical_timings(); /* don't trace print latency */
call_console_drivers(level, text, len);
start_critical_timings();
if (console_seq < console_end_seq) {
- raw_spin_lock(&logbuf_lock);
+ raw_spin_lock(&main_logbuf_lock);
goto again_noirq;
}
@@ -2335,7 +2335,7 @@ skip:
if (unlikely(exclusive_console))
exclusive_console = NULL;
- raw_spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&main_logbuf_lock);
up_console_sem();
@@ -2345,9 +2345,9 @@ skip:
* there's a new owner and the console_unlock() from them will do the
* flush, no worries.
*/
- raw_spin_lock(&logbuf_lock);
+ raw_spin_lock(&main_logbuf_lock);
retry = console_seq != get_next_seq(&main_log);
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
if (retry && console_trylock())
goto again;
@@ -2584,11 +2584,11 @@ void register_console(struct console *newcon)
* console_unlock(); will print out the buffered messages
* for us.
*/
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
console_seq = syslog_seq;
console_idx = syslog_idx;
console_prev = syslog_prev;
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
/*
* We're about to replay the log buffer. Only do this to the
* just-registered console to avoid excessive message spam to
@@ -2855,12 +2855,12 @@ void kmsg_dump(enum kmsg_dump_reason reason)
/* initialize iterator with data about the stored records */
dumper->active = true;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
dumper->cur_seq = clear_seq;
dumper->cur_idx = clear_idx;
dumper->next_seq = get_next_seq(&main_log);
dumper->next_idx = get_next_idx(&main_log);
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
/* invoke dumper which will iterate over records */
dumper->dump(dumper, reason);
@@ -2945,9 +2945,9 @@ bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
unsigned long flags;
bool ret;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
ret = kmsg_dump_get_line_nolock(dumper, syslog, line, size, len);
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
return ret;
}
@@ -2987,7 +2987,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
if (!dumper->active)
goto out;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
if (dumper->cur_seq < get_first_seq(&main_log)) {
/* messages are gone, move to first available one */
dumper->cur_seq = get_first_seq(&main_log);
@@ -2996,7 +2996,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
/* last entry */
if (dumper->cur_seq >= dumper->next_seq) {
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
goto out;
}
@@ -3043,7 +3043,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
dumper->next_seq = next_seq;
dumper->next_idx = next_idx;
ret = true;
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
out:
if (len)
*len = l;
@@ -3081,9 +3081,9 @@ void kmsg_dump_rewind(struct kmsg_dumper *dumper)
{
unsigned long flags;
- raw_spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&main_logbuf_lock, flags);
kmsg_dump_rewind_nolock(dumper);
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&main_logbuf_lock, flags);
}
EXPORT_SYMBOL_GPL(kmsg_dump_rewind);
--
1.8.4
--
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