1 files changed, 22 insertions, 17 deletions

diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index 283e92197bb1..aafe356ec1b7 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -37,18 +37,23 @@ static int check_sp(struct rock_ridge *rr, struct inode *inode)
         return 0;
 }
 
-#define SETUP_ROCK_RIDGE(DE,CHR,LEN)                            \
-  {LEN= sizeof(struct iso_directory_record) + DE->name_len[0];  \
-  if(LEN & 1) LEN++;                                            \
-  CHR = ((unsigned char *) DE) + LEN;                           \
-  LEN = *((unsigned char *) DE) - LEN;                          \
-  if (LEN<0) LEN=0;                                             \
-  if (ISOFS_SB(inode->i_sb)->s_rock_offset!=-1)                \
-  {                                                             \
-     LEN-=ISOFS_SB(inode->i_sb)->s_rock_offset;                \
-     CHR+=ISOFS_SB(inode->i_sb)->s_rock_offset;                \
-     if (LEN<0) LEN=0;                                          \
-  }                                                             \
+static void setup_rock_ridge(struct iso_directory_record *de,
+                        struct inode *inode, unsigned char **chr, int *len)
+{
+        *len = sizeof(struct iso_directory_record) + de->name_len[0];
+        if (*len & 1)
+                (*len)++;
+        *chr = (unsigned char *)de + *len;
+        *len = *((unsigned char *)de) - *len;
+        if (*len < 0)
+                *len = 0;
+
+        if (ISOFS_SB(inode->i_sb)->s_rock_offset != -1) {
+                *len -= ISOFS_SB(inode->i_sb)->s_rock_offset;
+                *chr += ISOFS_SB(inode->i_sb)->s_rock_offset;
+                if (*len < 0)
+                        *len = 0;
+        }
 }
 
 #define MAYBE_CONTINUE(LABEL,DEV) \
@@ -98,7 +103,7 @@ int get_rock_ridge_filename(struct iso_directory_record *de,
                 return 0;
         *retname = 0;
 
-        SETUP_ROCK_RIDGE(de, chr, len);
+        setup_rock_ridge(de, inode, &chr, &len);
 repeat:
 
         while (len > 2) { /* There may be one byte for padding somewhere */
@@ -188,7 +193,7 @@ parse_rock_ridge_inode_internal(struct iso_directory_record *de,
         if (!ISOFS_SB(inode->i_sb)->s_rock)
                 return 0;
 
-        SETUP_ROCK_RIDGE(de, chr, len);
+        setup_rock_ridge(de, inode, &chr, &len);
         if (regard_xa) {
                 chr += 14;
                 len -= 14;
@@ -527,7 +532,7 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
         struct buffer_head *bh;
         char *rpnt = link;
         unsigned char *pnt;
-        struct iso_directory_record *raw_inode;
+        struct iso_directory_record *raw_de;
         int cont_extent = 0;
         int cont_offset = 0;
         int cont_size = 0;
@@ -550,7 +555,7 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
         offset = ei->i_iget5_offset;
         pnt = (unsigned char *)bh->b_data + offset;
 
-        raw_inode = (struct iso_directory_record *)pnt;
+        raw_de = (struct iso_directory_record *)pnt;
 
         /*
          * If we go past the end of the buffer, there is some sort of error.
@@ -561,7 +566,7 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
         /* Now test for possible Rock Ridge extensions which will override
            some of these numbers in the inode structure. */
 
-        SETUP_ROCK_RIDGE(raw_inode, chr, len);
+        setup_rock_ridge(raw_de, inode, &chr, &len);
 
 repeat:
         while (len > 2) { /* There may be one byte for padding somewhere */