linux-master/mm/fadvise.c

31 int generic_fadvise(struct file *file, loff_t offset, loff_t len, int advice)
52 		switch (advice) {
59 			/* no bad return value, but ignore advice */
78 	switch (advice) {
180 int vfs_fadvise(struct file *file, loff_t offset, loff_t len, int advice)
183 		return file->f_op->fadvise(file, offset, len, advice);
185 	return generic_fadvise(file, offset, len, advice);
191 int ksys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
199 	ret = vfs_fadvise(f.file, offset, len, advice);
205 SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice)
207 	return ksys_fadvise64_64(fd, offset, len, advice);
212 SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice)
214 	return ksys_fadvise64_64(fd, offset, len, advice);
222 		       compat_arg_u64_dual(len), int, advice)
225 				 compat_arg_u64_glue(len), advice);