1  /* { dg-do compile } */
       2  /* { dg-require-effective-target arm_hard_vfp_ok } */
       3  /* { dg-options "-O2 -mapcs -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16" } */
       4  
       5  int inode_permission (), try_break_deleg ();
       6  int mutex_lock (), mutex_unlock ();
       7  struct mutex
       8  {
       9  };
      10  struct dentry
      11  {
      12    struct inode *d_inode;
      13  };
      14  struct inode
      15  {
      16    const struct inode_operations *i_op;
      17    struct super_block *i_sb;
      18      union
      19      {
      20        const unsigned int i_nlink;
      21      };
      22    unsigned long i_state;
      23    struct mutex i_mutex;
      24  };
      25  struct super_block
      26  {
      27    unsigned int s_max_links;
      28  };
      29  struct inode_operations
      30  {
      31    int (*link) (struct dentry *, struct inode *, struct dentry *);
      32  } __attribute__ ((__aligned__ ((1 << 6))));
      33  static inline __attribute__ ((always_inline))
      34  __attribute__ ((no_instrument_function))
      35  int may_create (struct inode *dir, struct dentry *child)
      36  {
      37    if (child->d_inode)
      38      return -17;
      39    return inode_permission (dir, 0x00000002 | 0x00000001);
      40  }
      41  
      42  int
      43  vfs_link (struct dentry *old_dentry, struct inode *dir,
      44  	  struct dentry *new_dentry, struct inode **delegated_inode)
      45  {
      46    struct inode *inode = old_dentry->d_inode;
      47    unsigned max_links = dir->i_sb->s_max_links;
      48    int error;
      49    error = may_create (dir, new_dentry);
      50    if (error)
      51      return error;
      52    mutex_lock (&inode->i_mutex);
      53    if (inode->i_nlink == 0 && !(inode->i_state & (1 << 10)))
      54      error = -2;
      55    else if (max_links && inode->i_nlink >= max_links)
      56      error = -31;
      57    else
      58      {
      59        error = try_break_deleg (inode, delegated_inode);
      60        error = dir->i_op->link (old_dentry, dir, new_dentry);
      61      }
      62    mutex_unlock (&inode->i_mutex);
      63    return error;
      64  }