gcc/testsuite/gcc.target/arm/pr67756.c

   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 }