The patch titled
rtc: push the BKL down into the driver ioctl method
has been added to the -mm tree. Its filename is
rtc-push-the-bkl-down-into-the-driver-ioctl-method.patch
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------------------------------------------------------
Subject: rtc: push the BKL down into the driver ioctl method
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
For now just wrap the main logic, but this driver is a prime candidate for
someone wanting to eliminate the lock entirely
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/rtc.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff -puN drivers/char/rtc.c~rtc-push-the-bkl-down-into-the-driver-ioctl-method drivers/char/rtc.c
--- a/drivers/char/rtc.c~rtc-push-the-bkl-down-into-the-driver-ioctl-method
+++ a/drivers/char/rtc.c
@@ -78,9 +78,10 @@
#include <linux/wait.h>
#include <linux/bcd.h>
#include <linux/delay.h>
+#include <linux/smp_lock.h>
+#include <linux/uaccess.h>
#include <asm/current.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#ifdef CONFIG_X86
@@ -142,8 +143,7 @@ static DEFINE_TIMER(rtc_irq_timer, rtc_d
static ssize_t rtc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos);
-static int rtc_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
+static int rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
#ifdef RTC_IRQ
static unsigned int rtc_poll(struct file *file, poll_table *wait);
@@ -716,10 +716,13 @@ static int rtc_do_ioctl(unsigned int cmd
&wtime, sizeof wtime) ? -EFAULT : 0;
}
-static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- return rtc_do_ioctl(cmd, arg, 0);
+ long ret;
+ lock_kernel();
+ ret = rtc_do_ioctl(cmd, arg, 0);
+ unlock_kernel();
+ return ret;
}
/*
@@ -912,7 +915,7 @@ static const struct file_operations rtc_
#ifdef RTC_IRQ
.poll = rtc_poll,
#endif
- .ioctl = rtc_ioctl,
+ .unlocked_ioctl = rtc_ioctl,
.open = rtc_open,
.release = rtc_release,
.fasync = rtc_fasync,
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are
origin.patch
serial-fix-enable_irq_wake-disable_irq_wake-imbalance-in-serial_corec.patch
linux-next.patch
add-time_is_after_jiffies-and-others-which-compare-with-jiffies.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch
paride-push-ioctl-down-into-driver.patch
pktcdvd-push-bkl-down-into-driver.patch
dac960-push-down-bkl.patch
pcwd-a-couple-of-watchdogs-escaped-conversion.patch
libata-sff-fix-oops-reported-in-kerneloopsorg-for-pnp-devices-with-no-ctl.patch
libata-sff-fix-oops-reported-in-kerneloopsorg-for-pnp-devices-with-no-ctl-fix.patch
ata-acpi-hotplug-handle-bay-devices-in-dock-stations.patch
ata-acpi-hotplug-handle-bay-devices-in-dock-stations-cleanup.patch
cm4000_cs-switch-to-unlocked_ioctl.patch
snapshot-push-bkl-down-into-ioctl-handlers.patch
rtc-push-the-bkl-down-into-the-driver-ioctl-method.patch
efirtc-push-down-the-bkl.patch
ip2-push-bkl-down-for-the-firmware-interface.patch
mwave-ioctl-bkl-pushdown.patch
rio-push-down-the-bkl-into-the-firmware-ioctl-handler.patch
sx-push-bkl-down-into-the-firmware-ioctl-handler.patch
ixj-push-bkl-into-driver-and-wrap-ioctls.patch
ppdev-wrap-ioctl-handler-in-driver-and-push-lock-down.patch
ds1302-push-down-the-bkl-into-the-driver-ioctl-code.patch
dsp56k-bkl-pushdown.patch
lcd-push-the-bkl-down-into-the-driver-ioctl-handler.patch
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