apm_32: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index bf9290e..8222236 100644 (file)
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -204,6 +204,7 @@
 #include <linux/module.h>
 
 #include <linux/poll.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/stddef.h>
 #include <linux/timer.h>
@@ -1544,10 +1545,12 @@ static int do_open(struct inode *inode, struct file *filp)
 {
        struct apm_user *as;
 
+       lock_kernel();
        as = kmalloc(sizeof(*as), GFP_KERNEL);
        if (as == NULL) {
                printk(KERN_ERR "apm: cannot allocate struct of size %d bytes\n",
                       sizeof(*as));
+                      unlock_kernel();
                return -ENOMEM;
        }
        as->magic = APM_BIOS_MAGIC;
@@ -1569,6 +1572,7 @@ static int do_open(struct inode *inode, struct file *filp)
        user_list = as;
        spin_unlock(&user_list_lock);
        filp->private_data = as;
+       unlock_kernel();
        return 0;
 }