ecryptfs: inode.c mmap.c use unaligned byteorder helpers

Fixe sparse warnings:
fs/ecryptfs/inode.c:368:15: warning: cast to restricted __be64
fs/ecryptfs/mmap.c:385:12: warning: incorrect type in assignment (different base types)
fs/ecryptfs/mmap.c:385:12:    expected unsigned long long [unsigned] [assigned] [usertype] file_size
fs/ecryptfs/mmap.c:385:12:    got restricted __be64 [usertype] <noident>
fs/ecryptfs/mmap.c:428:12: warning: incorrect type in assignment (different base types)
fs/ecryptfs/mmap.c:428:12:    expected unsigned long long [unsigned] [assigned] [usertype] file_size
fs/ecryptfs/mmap.c:428:12:    got restricted __be64 [usertype] <noident>

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 5 insertions, 10 deletions

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c92cc1c00aae..7315547193ea 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -31,6 +31,7 @@
 #include <linux/mount.h>
 #include <linux/crypto.h>
 #include <linux/fs_stack.h>
+#include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
 static struct dentry *lock_parent(struct dentry *dentry)
@@ -364,8 +365,7 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
                 else
                         file_size = i_size_read(lower_dentry->d_inode);
         } else {
-                memcpy(&file_size, page_virt, sizeof(file_size));
-                file_size = be64_to_cpu(file_size);
+                file_size = get_unaligned_be64(page_virt);
         }
         i_size_write(dentry->d_inode, (loff_t)file_size);
         kmem_cache_free(ecryptfs_header_cache_2, page_virt);
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 2b6fe1e6e8ba..245c2dc02d5c 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -32,6 +32,7 @@
 #include <linux/file.h>
 #include <linux/crypto.h>
 #include <linux/scatterlist.h>
+#include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
 /**
@@ -372,7 +373,6 @@ out:
  */
 static int ecryptfs_write_inode_size_to_header(struct inode *ecryptfs_inode)
 {
-        u64 file_size;
         char *file_size_virt;
         int rc;
 
@@ -381,9 +381,7 @@ static int ecryptfs_write_inode_size_to_header(struct inode *ecryptfs_inode)
                 rc = -ENOMEM;
                 goto out;
         }
-        file_size = (u64)i_size_read(ecryptfs_inode);
-        file_size = cpu_to_be64(file_size);
-        memcpy(file_size_virt, &file_size, sizeof(u64));
+        put_unaligned_be64(i_size_read(ecryptfs_inode), file_size_virt);
         rc = ecryptfs_write_lower(ecryptfs_inode, file_size_virt, 0,
                                   sizeof(u64));
         kfree(file_size_virt);
@@ -403,7 +401,6 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
         struct dentry *lower_dentry =
                 ecryptfs_inode_to_private(ecryptfs_inode)->lower_file->f_dentry;
         struct inode *lower_inode = lower_dentry->d_inode;
-        u64 file_size;
         int rc;
 
         if (!lower_inode->i_op->getxattr || !lower_inode->i_op->setxattr) {
@@ -424,9 +421,7 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
                                            xattr_virt, PAGE_CACHE_SIZE);
         if (size < 0)
                 size = 8;
-        file_size = (u64)i_size_read(ecryptfs_inode);
-        file_size = cpu_to_be64(file_size);
-        memcpy(xattr_virt, &file_size, sizeof(u64));
+        put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
         rc = lower_inode->i_op->setxattr(lower_dentry, ECRYPTFS_XATTR_NAME,
                                          xattr_virt, size, 0);
         mutex_unlock(&lower_inode->i_mutex);