From: Eric W. Biederman <ebiederm@xmission.com>
Date: Sat, 11 Feb 2012 19:23:51 +0000 (-0800)
Subject: userns: Convert loop to use kuid_t instead of uid_t
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e4849737f76c8767e70dc1575f6e59fc3682b3fe;p=linux-beck.git

userns: Convert loop to use kuid_t instead of uid_t

Cc: Jens Axboe <jaxboe@fusionio.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3bba65510d23..e9d594fd12cb 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1038,10 +1038,10 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
 {
 	int err;
 	struct loop_func_table *xfer;
-	uid_t uid = current_uid();
+	kuid_t uid = current_uid();
 
 	if (lo->lo_encrypt_key_size &&
-	    lo->lo_key_owner != uid &&
+	    !uid_eq(lo->lo_key_owner, uid) &&
 	    !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	if (lo->lo_state != Lo_bound)
diff --git a/include/linux/loop.h b/include/linux/loop.h
index 11a41a8f08eb..9635116dd830 100644
--- a/include/linux/loop.h
+++ b/include/linux/loop.h
@@ -44,7 +44,7 @@ struct loop_device {
 	int		lo_encrypt_key_size;
 	struct loop_func_table *lo_encryption;
 	__u32           lo_init[2];
-	uid_t		lo_key_owner;	/* Who set the key */
+	kuid_t		lo_key_owner;	/* Who set the key */
 	int		(*ioctl)(struct loop_device *, int cmd, 
 				 unsigned long arg); 
 
diff --git a/init/Kconfig b/init/Kconfig
index f0371a65ac06..f31599739f7f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -960,7 +960,6 @@ config UIDGID_CONVERTED
 	depends on !UML || HOSTFS = n
 
 	# The rare drivers that won't build
-	depends on BLK_DEV_LOOP = n
 	depends on ANDROID_BINDER_IPC = n
 
 	# Security modules