isapnp: BKL removal

Remove BKL use from isapnp_proc_bus_lseek(), like was done for
proc_bus_pci_lseek() a long time ago and recently for Zorro
by Geert Uytterhoeven.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jaroslav Kysela <perex@perex.cz>

diff --git a/drivers/pnp/isapnp/proc.c b/drivers/pnp/isapnp/proc.c
index 3f94eda..e73ebef 100644 (file)
--- a/drivers/pnp/isapnp/proc.c
+++ b/drivers/pnp/isapnp/proc.c
@@ -31,8 +31,9 @@ static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
 static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
 {
        loff_t new = -1;
+       struct inode *inode = file->f_path.dentry->d_inode;
 
-       lock_kernel();
+       mutex_lock(&inode->i_mutex);
        switch (whence) {
        case 0:
                new = off;
@@ -44,12 +45,12 @@ static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
                new = 256 + off;
                break;
        }
-       if (new < 0 || new > 256) {
-               unlock_kernel();
-               return -EINVAL;
-       }
-       unlock_kernel();
-       return (file->f_pos = new);
+       if (new < 0 || new > 256)
+               new = -EINVAL;
+       else
+               file->f_pos = new;
+       mutex_unlock(&inode->i_mutex);
+       return new;
 }
 
 static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,