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block: autoconvert trivial BKL users to private mutex

Browse source 
The block device drivers have all gained new lock_kernel
calls from a recent pushdown, and some of the drivers
were already using the BKL before.

This turns the BKL into a set of per-driver mutexes.
Still need to check whether this is safe to do.

file=$1
name=$2
if grep -q lock_kernel ${file} ; then
    if grep -q 'include.*linux.mutex.h' ${file} ; then
            sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
    else
            sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
    fi
    sed -i ${file} \
        -e "/^#include.*linux.mutex.h/,$ {
                1,/^\(static\|int\|long\)/ {
                     /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);

} }"  \
    -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
    -e '/[      ]*cycle_kernel_lock();/d'
else
    sed -i -e '/include.*\<smp_lock.h\>/d' ${file}  \
                -e '/cycle_kernel_lock()/d'
fi

Signed-off-by: Arnd Bergmann <[email protected]>
This commit is contained in:
Arnd Bergmann 2010-06-02 14:28:52 +02:00
commit 2a48fc0ab2
43 changed files with 277 additions and 250 deletions
Download patch file Download diff file Expand all files Collapse all files

11
drivers/memstick/core/mspro_block.c
View file

@ -18,11 +18,12 @@
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/memstick.h>
#define DRIVER_NAME "mspro_block"
static DEFINE_MUTEX(mspro_block_mutex);
static int major;
module_param(major, int, 0644);
@ -180,7 +181,7 @@ static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
struct mspro_block_data *msb = disk->private_data;
int rc = -ENXIO;
lock_kernel();
mutex_lock(&mspro_block_mutex);
mutex_lock(&mspro_block_disk_lock);
if (msb && msb->card) {
@ -192,7 +193,7 @@ static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
}
mutex_unlock(&mspro_block_disk_lock);
unlock_kernel();
mutex_unlock(&mspro_block_mutex);
return rc;
}
@ -225,9 +226,9 @@ static int mspro_block_disk_release(struct gendisk *disk)
static int mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
{
int ret;
lock_kernel();
mutex_lock(&mspro_block_mutex);
ret = mspro_block_disk_release(disk);
unlock_kernel();
mutex_unlock(&mspro_block_mutex);
return ret;
}