mips: Remove BKL from tb0219
cycle_kernel_lock() was added during the big BKL pushdown. It should
ensure the serializiation against driver init code.
tb0219_base is initialized before the character device is
registered, but the spinlock is not initialized.
Initialize the spinlock statically and remove cycle_kernel_lock().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <20091010153350.222654356@linutronix.de>
Cc: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
diff --git a/drivers/char/tb0219.c b/drivers/char/tb0219.c
index b3ec9b1..cad4eb6 100644
--- a/drivers/char/tb0219.c
+++ b/drivers/char/tb0219.c
@@ -21,7 +21,6 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/reboot.h>
@@ -38,7 +37,7 @@
static void (*old_machine_restart)(char *command);
static void __iomem *tb0219_base;
-static spinlock_t tb0219_lock;
+static DEFINE_SPINLOCK(tb0219_lock);
#define tb0219_read(offset) readw(tb0219_base + (offset))
#define tb0219_write(offset, value) writew((value), tb0219_base + (offset))
@@ -237,7 +236,6 @@
{
unsigned int minor;
- cycle_kernel_lock();
minor = iminor(inode);
switch (minor) {
case 0:
@@ -306,8 +304,6 @@
return retval;
}
- spin_lock_init(&tb0219_lock);
-
old_machine_restart = _machine_restart;
_machine_restart = tb0219_restart;