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Subject[PATCH 20/68] epca: Kill the big kernel lock
Date
From: Alan Cox <alan@linux.intel.com>

The lock is no longer needed for wait until sent paths so this can go

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/char/epca.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 6f5ffe1..d9df46a 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -36,7 +36,7 @@
#include <linux/ctype.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
-#include <linux/smp_lock.h>
+#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
@@ -2105,7 +2105,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
break;
case DIGI_SETAW:
case DIGI_SETAF:
- lock_kernel();
if (cmd == DIGI_SETAW) {
/* Setup an event to indicate when the transmit
buffer empties */
@@ -2118,7 +2117,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
if (tty->ldisc->ops->flush_buffer)
tty->ldisc->ops->flush_buffer(tty);
}
- unlock_kernel();
/* Fall Thru */
case DIGI_SETA:
if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
--
1.7.2


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