Viewing file:  pr65505.c (2.09 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-additional-options "-std=gnu99" } */
struct thread_info {
struct task_struct *task;
};
static inline __attribute__((always_inline))
__attribute__((no_instrument_function))
struct thread_info *current_thread_info(void)
{
struct thread_info *ti;
unsigned long __dummy;
__asm__ __volatile__ (
"mov r15, %0\n\t"
"and %1, %0\n\t"
: "=&r" (ti), "=r" (__dummy)
: "1" (~((1 << 13) - 1))
: "memory");
return ti;
}
typedef struct seqcount {
unsigned sequence;
} seqcount_t;
struct inode;
struct dentry {
seqcount_t d_seq;
struct inode *d_inode;
};
struct path {
struct vfsmount *mnt;
struct dentry *dentry;
};
struct file {
struct path f_path;
} __attribute__((aligned(4)));
struct task_struct
{
int link_count, total_link_count;
struct fs_struct *fs;
};
struct fd {
struct file *file;
unsigned int flags;
};
static inline __attribute__((always_inline))
__attribute__((no_instrument_function))
struct fd
fdget_raw(unsigned int fd)
{
return (struct fd){(struct file *)(fd & ~3),fd & 3};
}
struct fs_struct;
struct nameidata {
struct path path;
struct path root;
struct inode *inode;
unsigned int flags;
unsigned seq, m_seq;
struct file *base;
};
int read_seqcount_retry(const seqcount_t *s, unsigned start);
int
path_init(int dfd, const char *name, unsigned int flags,
struct nameidata *nd)
{
int retval = 0;
if (*name=='/') {
nd->path = nd->root;
} else if (dfd == -100) {
if (flags & 0x0040) {
struct fs_struct *fs = (current_thread_info()->task)->fs;
}
} else {
struct fd f = fdget_raw(dfd);
struct dentry *dentry;
if (!f.file)
return -9;
dentry = f.file->f_path.dentry;
nd->path = f.file->f_path;
if (flags & 0x0040) {
if (f.flags & 1)
nd->base = f.file;
}
}
nd->inode = nd->path.dentry->d_inode;
if (!(flags & 0x0040))
goto done;
if (__builtin_expect(!!(!read_seqcount_retry(&nd->path.dentry->d_seq, nd->seq)), 1))
goto done;
if (!(nd->flags & 0x2000))
nd->root.mnt = ((void *)0);
return -10;
done:
(current_thread_info()->task)->total_link_count = 0;
return 0;
}
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