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@@ -107,6 +107,7 @@
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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+#include <linux/smp_lock.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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@@ -333,12 +334,14 @@ nvram_ioctl(struct inode *inode, struct file *file,
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static int
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nvram_open(struct inode *inode, struct file *file)
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{
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+ lock_kernel();
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spin_lock(&nvram_state_lock);
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if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
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(nvram_open_mode & NVRAM_EXCL) ||
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((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
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spin_unlock(&nvram_state_lock);
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+ unlock_kernel();
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return -EBUSY;
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}
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@@ -349,6 +352,7 @@ nvram_open(struct inode *inode, struct file *file)
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nvram_open_cnt++;
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spin_unlock(&nvram_state_lock);
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+ unlock_kernel();
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return 0;
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}
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