From: Thomas Gleixner Date: Sat, 10 Oct 2009 15:36:34 +0000 (+0000) Subject: um: Remove BKL from mmapper X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d63c489b881707adf9c0b89f771b30a1d78f4197;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git um: Remove BKL from mmapper cycle_kernel_lock() was added during the big BKL pushdown. It should ensure the serializiation against driver init code. mmapper_open() cannot be called before misc_register() succeeded, but p_buf might be uninitialized. Move the initialization of p_buf before the misc_register() call and get rid of cycle_kernel_lock(). Signed-off-by: Thomas Gleixner LKML-Reference: <20091010153349.682213670@linutronix.de> Cc: Jeff Dike --- diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c index eb240323c40a..d22f9e5c0eac 100644 --- a/arch/um/drivers/mmapper_kern.c +++ b/arch/um/drivers/mmapper_kern.c @@ -16,7 +16,7 @@ #include #include #include -#include + #include #include "mem_user.h" @@ -78,7 +78,6 @@ out: static int mmapper_open(struct inode *inode, struct file *file) { - cycle_kernel_lock(); return 0; } @@ -115,18 +114,16 @@ static int __init mmapper_init(void) v_buf = (char *) find_iomem("mmapper", &mmapper_size); if (mmapper_size == 0) { printk(KERN_ERR "mmapper_init - find_iomem failed\n"); - goto out; + return -ENODEV; } + p_buf = __pa(v_buf); err = misc_register(&mmapper_dev); if (err) { printk(KERN_ERR "mmapper - misc_register failed, err = %d\n", err); - goto out; + return err;; } - - p_buf = __pa(v_buf); -out: return 0; }