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From 1bec6d54ea9d95f784f09411062d6747956ac28e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sat, 25 Jul 2009 17:50:36 +0200
Subject: [PATCH] printk: Convert logbuf_lock to raw_spinlock
commit 0835f1f82a88e366d8dd20874c94133915dcccdb in tip.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
kernel/printk.c | 42 +++++++++++++++++++++---------------------
lib/ratelimit.c | 4 ++--
2 files changed, 23 insertions(+), 23 deletions(-)
diff --git a/kernel/printk.c b/kernel/printk.c
index 53011ba..5b4ce9f 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -101,7 +101,7 @@ static int console_locked, console_suspended;
* It is also used in interesting ways to provide interlocking in
* release_console_sem().
*/
-static DEFINE_SPINLOCK(logbuf_lock);
+static DEFINE_RAW_SPINLOCK(logbuf_lock);
#define LOG_BUF_MASK (log_buf_len-1)
#define LOG_BUF(idx) (log_buf[(idx) & LOG_BUF_MASK])
@@ -181,7 +181,7 @@ static int __init log_buf_len_setup(char *str)
goto out;
}
- spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&logbuf_lock, flags);
log_buf_len = size;
log_buf = new_log_buf;
@@ -195,7 +195,7 @@ static int __init log_buf_len_setup(char *str)
log_start -= offset;
con_start -= offset;
log_end -= offset;
- spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&logbuf_lock, flags);
printk(KERN_NOTICE "log_buf_len: %d\n", log_buf_len);
}
@@ -290,18 +290,18 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
if (error)
goto out;
i = 0;
- spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&logbuf_lock);
while (!error && (log_start != log_end) && i < len) {
c = LOG_BUF(log_start);
log_start++;
- spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&logbuf_lock);
error = __put_user(c,buf);
buf++;
i++;
cond_resched();
- spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&logbuf_lock);
}
- spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&logbuf_lock);
if (!error)
error = i;
break;
@@ -324,7 +324,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
count = len;
if (count > log_buf_len)
count = log_buf_len;
- spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&logbuf_lock);
if (count > logged_chars)
count = logged_chars;
if (do_clear)
@@ -341,12 +341,12 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
if (j + log_buf_len < log_end)
break;
c = LOG_BUF(j);
- spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&logbuf_lock);
error = __put_user(c,&buf[count-1-i]);
cond_resched();
- spin_lock_irq(&logbuf_lock);
+ raw_spin_lock_irq(&logbuf_lock);
}
- spin_unlock_irq(&logbuf_lock);
+ raw_spin_unlock_irq(&logbuf_lock);
if (error)
break;
error = i;
@@ -535,7 +535,7 @@ static void zap_locks(void)
oops_timestamp = jiffies;
/* If a crash is occurring, make sure we can't deadlock */
- spin_lock_init(&logbuf_lock);
+ raw_spin_lock_init(&logbuf_lock);
/* And make sure that we print immediately */
semaphore_init(&console_sem);
}
@@ -639,7 +639,7 @@ static int acquire_console_semaphore_for_printk(unsigned int cpu)
}
}
printk_cpu = UINT_MAX;
- spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&logbuf_lock);
return retval;
}
static const char recursion_bug_msg [] =
@@ -697,7 +697,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
}
lockdep_off();
- spin_lock(&logbuf_lock);
+ raw_spin_lock(&logbuf_lock);
printk_cpu = this_cpu;
if (recursion_bug) {
@@ -1046,14 +1046,14 @@ void release_console_sem(void)
console_may_schedule = 0;
for ( ; ; ) {
- spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&logbuf_lock, flags);
wake_klogd |= log_start - log_end;
if (con_start == log_end)
break; /* Nothing to print */
_con_start = con_start;
_log_end = log_end;
con_start = log_end; /* Flush */
- spin_unlock(&logbuf_lock);
+ raw_spin_unlock(&logbuf_lock);
stop_critical_timings(); /* don't trace print latency */
call_console_drivers(_con_start, _log_end);
start_critical_timings();
@@ -1061,7 +1061,7 @@ void release_console_sem(void)
}
console_locked = 0;
up(&console_sem);
- spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&logbuf_lock, flags);
if (wake_klogd)
wake_up_klogd();
}
@@ -1279,9 +1279,9 @@ void register_console(struct console *newcon)
* release_console_sem() will print out the buffered messages
* for us.
*/
- spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&logbuf_lock, flags);
con_start = log_start;
- spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&logbuf_lock, flags);
}
release_console_sem();
@@ -1490,10 +1490,10 @@ void kmsg_dump(enum kmsg_dump_reason reason)
/* Theoretically, the log could move on after we do this, but
there's not a lot we can do about that. The new messages
will overwrite the start of what we dump. */
- spin_lock_irqsave(&logbuf_lock, flags);
+ raw_spin_lock_irqsave(&logbuf_lock, flags);
end = log_end & LOG_BUF_MASK;
chars = logged_chars;
- spin_unlock_irqrestore(&logbuf_lock, flags);
+ raw_spin_unlock_irqrestore(&logbuf_lock, flags);
if (logged_chars > end) {
s1 = log_buf + log_buf_len - logged_chars + end;
diff --git a/lib/ratelimit.c b/lib/ratelimit.c
index 027a03f..c96d500 100644
--- a/lib/ratelimit.c
+++ b/lib/ratelimit.c
@@ -39,7 +39,7 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func)
* in addition to the one that will be printed by
* the entity that is holding the lock already:
*/
- if (!spin_trylock_irqsave(&rs->lock, flags))
+ if (!raw_spin_trylock_irqsave(&rs->lock, flags))
return 0;
if (!rs->begin)
@@ -60,7 +60,7 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func)
rs->missed++;
ret = 0;
}
- spin_unlock_irqrestore(&rs->lock, flags);
+ raw_spin_unlock_irqrestore(&rs->lock, flags);
return ret;
}
--
1.7.0.4
|
