src/cf/linux-test4.m4

   1
   2 AC_DEFUN([LINUX_AIO_NONVECTOR],
   3  [AC_CHECK_LINUX_BUILD([for non-vectorized aio kernel functions],
   4                        [ac_cv_linux_aio_nonvector],
   5                        [#include <linux/fs.h>],
   6                        [extern ssize_t
   7                         generic_file_aio_read(struct kiocb *, char __user *,
   8                                               size_t, loff_t);],
   9                        [LINUX_HAS_NONVECTOR_AIO],
  10                        [define if kernel functions like generic_file_aio_read use
  11                         non-vectorized i/o],
  12                        [])
  13  ])
  14
  15 AC_DEFUN([LINUX_EXPORTS_TASKLIST_LOCK], [
  16   AC_CHECK_LINUX_BUILD([for exported tasklist_lock],
  17                        [ac_cv_linux_exports_tasklist_lock],
  18 [#include <linux/sched.h>],
  19 [
  20 extern rwlock_t tasklist_lock __attribute__((weak));
  21 read_lock(&tasklist_lock);
  22 ],
  23                        [EXPORTED_TASKLIST_LOCK],
  24                        [define if tasklist_lock exported],
  25                        [])
  26 ])
  27
  28 AC_DEFUN([LINUX_COMPLETION_H_EXISTS], [
  29   AC_CHECK_LINUX_BUILD([for linux/completion.h],
  30                        [ac_cv_linux_completion_h_exists],
  31 [#include <linux/version.h>
  32 #include <linux/completion.h>],
  33 [struct completion _c;
  34 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,8)
  35 lose
  36 #endif],
  37                        [HAVE_LINUX_COMPLETION_H]
  38                        [Define if your kernel has a usable linux/completion.h],
  39                        [])
  40 ])
  41
  42
  43 AC_DEFUN([LINUX_EXPORTS_INIT_MM], [
  44   AC_CHECK_LINUX_BUILD([for exported init_mm],
  45                        [ac_cv_linux_exports_init_mm],
  46                        [extern struct mm_struct init_mm;],
  47                        [void *address = &init_mm; printk("%p\n", address);],
  48                        [EXPORTED_INIT_MM],
  49                        [define if your kernel exports init_mm],
  50                        [])
  51   ])
  52
  53
  54 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_ADDRESS], [
  55   AC_CHECK_LINUX_BUILD([for exported kallsyms_address_to_symbol],
  56                        [ac_cv_linux_exports_kallsyms_address],
  57                        [#include <linux/modversions.h>],
  58 [#ifndef __ver_kallsyms_address_to_symbol
  59 #error kallsyms_address_to_symbol not exported
  60 #endif],
  61                        [EXPORTED_KALLSYMS_ADDRESS],
  62                        [define if your linux kernel exports kallsyms address],
  63                        [])
  64 ])
  65
  66
  67 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_SYMBOL], [
  68   AC_CHECK_LINUX_BUILD([for exported kallsyms_symbol_to_address],
  69                        [ac_cv_linux_exports_kallsyms_symbol],
  70                        [#include <linux/modversions.h>],
  71 [#ifndef __ver_kallsyms_symbol_to_address
  72 #error kallsyms_symbol_to_address not exported
  73 #endif],
  74                        [EXPORTED_KALLSYMS_SYMBOL],
  75                        [define if your linux kernel exports kallsyms],
  76                        [])
  77 ])
  78
  79
  80 AC_DEFUN([LINUX_EXPORTS_SYS_CALL_TABLE], [
  81   AC_CHECK_LINUX_BUILD([for exported sys_call_table],
  82                        [ac_cv_linux_exports_sys_call_table],
  83                        [#include <linux/modversions.h>],
  84 [#ifndef __ver_sys_call_table
  85 #error sys_call_table not exported
  86 #endif],
  87                        [EXPORTED_SYS_CALL_TABLE],
  88                        [define if your linux kernel exports sys_call_table],
  89                        [])
  90 ])
  91
  92
  93 AC_DEFUN([LINUX_EXPORTS_IA32_SYS_CALL_TABLE], [
  94   AC_CHECK_LINUX_BUILD([for exported ia32_sys_call_table],
  95                        [ac_cv_linux_exports_ia32_sys_call_table],
  96                        [#include <linux/modversions.h>],
  97 [#ifndef __ver_ia32_sys_call_table
  98 #error ia32_sys_call_table not exported
  99 #endif],
 100                        [EXPORTED_IA32_SYS_CALL_TABLE],
 101                        [define if your linux kernel exports ia32_sys_call_table],
 102                        [])
 103 ])
 104
 105
 106 AC_DEFUN([LINUX_EXPORTS_SYS_CHDIR], [
 107   AC_CHECK_LINUX_BUILD([for exported sys_chdir],
 108                        [ac_cv_linux_exports_sys_chdir],
 109                        [extern asmlinkage long sys_chdir(void) __attribute__((weak));],
 110                        [void *address = &sys_chdir; printk("%p\n", address);],
 111                        [EXPORTED_SYS_CHDIR],
 112                        [define if your linux kernel exports sys_chdir],
 113                        [])
 114 ])
 115
 116
 117 AC_DEFUN([LINUX_EXPORTS_SYS_OPEN], [
 118   AC_CHECK_LINUX_BUILD([for exported sys_open],
 119                        [ac_cv_linux_exports_sys_open],
 120                        [extern asmlinkage long sys_open(void) __attribute__((weak));],
 121                        [void *address = &sys_open; printk("%p\n", address);],
 122                        [EXPORTED_SYS_OPEN],
 123                        [define if your linux kernel exports sys_open],
 124                        [])
 125 ])
 126
 127
 128 AC_DEFUN([LINUX_RECALC_SIGPENDING_ARG_TYPE], [
 129   AC_CHECK_LINUX_BUILD([for recalc_sigpending arg type],
 130                        [ac_cv_linux_func_recalc_sigpending_takes_void],
 131                        [#include <linux/sched.h>],
 132                        [recalc_sigpending();],
 133                        [RECALC_SIGPENDING_TAKES_VOID],
 134                        [define if your recalc_sigpending takes void],
 135                        [])
 136 ])
 137
 138
 139 AC_DEFUN([LINUX_SCHED_STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM], [
 140   AC_CHECK_LINUX_BUILD([for signal->rlim in struct task_struct],
 141                        [ac_cv_linux_sched_struct_task_struct_has_signal_rlim],
 142                        [#include <linux/sched.h>],
 143                        [struct task_struct _tsk; printk("%d\n", _tsk.signal->rlim);],
 144                        [STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM],
 145                        [define if your struct task_struct has signal->rlim],
 146                        [])
 147 ])
 148
 149
 150 AC_DEFUN([LINUX_KERNEL_POSIX_LOCK_FILE_WAIT_ARG], [
 151   AC_CHECK_LINUX_BUILD([for 3rd argument in posix_lock_file found in new kernels],
 152                        [ac_cv_linux_kernel_posix_lock_file_wait_arg],
 153                        [#include <linux/fs.h>],
 154                        [posix_lock_file(0,0,0);],
 155                        [POSIX_LOCK_FILE_WAIT_ARG],
 156                        [define if your kernel uses 3 arguments for posix_lock_file],
 157                        [])
 158 ])
 159
 160 AC_DEFUN([LINUX_KERNEL_SOCK_CREATE], [
 161   AC_CHECK_LINUX_BUILD([for 5th argument in sock_create found in some SELinux kernels],
 162                        [ac_cv_linux_kernel_sock_create_v],
 163                        [#include <linux/net.h>],
 164                        [sock_create(0,0,0,0,0);],
 165                        [LINUX_KERNEL_SOCK_CREATE_V],
 166                        [define if your linux kernel uses 5 arguments for sock_create],
 167                        [])
 168 ])
 169
 170
 171 AC_DEFUN([LINUX_INODE_SETATTR_RETURN_TYPE], [
 172   AC_CHECK_LINUX_BUILD([for inode_setattr return type],
 173                        [ac_cv_linux_func_inode_setattr_returns_int],
 174                        [#include <linux/fs.h>],
 175                        [struct inode _inode;
 176                         struct iattr _iattr;
 177                         int i;
 178                         i = inode_setattr(&_inode, &_iattr);],
 179                        [INODE_SETATTR_NOT_VOID],
 180                        [define if your setattr return return non-void],
 181                        [])
 182 ])
 183
 184
 185
 186 AC_DEFUN([LINUX_AOP_WRITEBACK_CONTROL], [
 187   AC_CHECK_LINUX_BUILD([whether aop.writepage takes a writeback_control],
 188                        [ac_cv_linux_func_a_writepage_takes_writeback_control],
 189 [#include <linux/fs.h>
 190 #include <linux/mm.h>
 191 #include <linux/writeback.h>],
 192 [struct address_space_operations _aops;
 193 struct page _page;
 194 struct writeback_control _writeback_control;
 195 (void)_aops.writepage(&_page, &_writeback_control);],
 196                        [AOP_WRITEPAGE_TAKES_WRITEBACK_CONTROL],
 197                        [define if aops.writepage takes a struct writeback_control],
 198                        [])
 199 ])
 200
 201
 202 AC_DEFUN([LINUX_REFRIGERATOR], [
 203   AC_CHECK_LINUX_BUILD([whether refrigerator takes PF_FREEZE],
 204                        [ac_cv_linux_func_refrigerator_takes_pf_freeze],
 205 [#include <linux/sched.h>
 206 #ifdef HAVE_LINUX_FREEZER_H
 207 #include <linux/freezer.h>
 208 #endif],
 209                        [refrigerator(PF_FREEZE);],
 210                        [LINUX_REFRIGERATOR_TAKES_PF_FREEZE],
 211                        [define if your refrigerator takes PF_FREEZE],
 212                        [])
 213 ])
 214
 215
 216 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_NAMEIDATA], [
 217   AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a nameidata],
 218                        [ac_cv_linux_func_i_create_takes_nameidata],
 219 [#include <linux/fs.h>
 220 #include <linux/namei.h>],
 221 [struct inode _inode;
 222 struct dentry _dentry;
 223 struct nameidata _nameidata;
 224 (void)_inode.i_op->create(&_inode, &_dentry, 0, &_nameidata);],
 225
 226                        [IOP_CREATE_TAKES_NAMEIDATA],
 227                        [define if your iops.create takes a nameidata argument],
 228                        [])
 229 ])
 230
 231
 232 AC_DEFUN([LINUX_IOP_I_LOOKUP_TAKES_NAMEIDATA], [
 233   AC_CHECK_LINUX_BUILD([whether inode_operations.lookup takes a nameidata],
 234                        [ac_cv_linux_func_i_lookup_takes_nameidata],
 235 [#include <linux/fs.h>
 236 #include <linux/namei.h>],
 237 [struct inode _inode;
 238 struct dentry _dentry;
 239 struct nameidata _nameidata;
 240 (void)_inode.i_op->lookup(&_inode, &_dentry, &_nameidata);],
 241                        [IOP_LOOKUP_TAKES_NAMEIDATA],
 242                        [define if your iops.lookup takes a nameidata argument],
 243                        [])
 244 ])
 245
 246
 247 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_NAMEIDATA], [
 248   AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes a nameidata],
 249                        [ac_cv_linux_func_i_permission_takes_nameidata],
 250 [#include <linux/fs.h>
 251 #include <linux/namei.h>],
 252 [struct inode _inode;
 253 struct nameidata _nameidata;
 254 (void)_inode.i_op->permission(&_inode, 0, &_nameidata);],
 255                        [IOP_PERMISSION_TAKES_NAMEIDATA],
 256                        [define if your iops.permission takes a nameidata argument],
 257                        [-Werror])
 258 ])
 259
 260
 261 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_FLAGS], [
 262   AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes flags],
 263                         [ac_cv_linux_func_i_permission_takes_flags],
 264                         [#include <linux/fs.h>],
 265                         [struct inode _inode = {0};
 266                         unsigned int flags = 0;
 267                         (void)_inode.i_op->permission(&_inode, 0, flags);],
 268                        [IOP_PERMISSION_TAKES_FLAGS],
 269                        [define if your iops.permission takes a flags argument],
 270                        [-Werror])
 271 ])
 272
 273
 274 AC_DEFUN([LINUX_IOP_I_PUT_LINK_TAKES_COOKIE], [
 275   AC_CHECK_LINUX_BUILD([whether inode_operations.put_link takes an opaque cookie],
 276                        [ac_cv_linux_func_i_put_link_takes_cookie],
 277 [#include <linux/fs.h>
 278 #include <linux/namei.h>],
 279 [struct inode _inode;
 280 struct dentry _dentry;
 281 struct nameidata _nameidata;
 282 void *cookie;
 283 (void)_inode.i_op->put_link(&_dentry, &_nameidata, cookie);],
 284                        [IOP_PUT_LINK_TAKES_COOKIE],
 285                        [define if your iops.put_link takes a cookie],
 286                        [])
 287 ])
 288
 289
 290 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_NAMEIDATA], [
 291   AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes a nameidata],
 292                        [ac_cv_linux_func_d_revalidate_takes_nameidata],
 293 [#include <linux/fs.h>
 294 #include <linux/namei.h>],
 295 [struct dentry _dentry;
 296 struct nameidata _nameidata;
 297 (void)_dentry.d_op->d_revalidate(&_dentry, &_nameidata);],
 298                        [DOP_REVALIDATE_TAKES_NAMEIDATA],
 299                        [define if your dops.d_revalidate takes a nameidata argument],
 300                        [])
 301 ])
 302
 303
 304 AC_DEFUN([LINUX_GET_SB_HAS_STRUCT_VFSMOUNT], [
 305   AC_CHECK_LINUX_BUILD([for struct vfsmount * in get_sb_nodev()],
 306                        [ac_cv_linux_get_sb_has_struct_vfsmount],
 307                        [#include <linux/fs.h>],
 308                        [get_sb_nodev(0,0,0,0,0);],
 309                        [GET_SB_HAS_STRUCT_VFSMOUNT],
 310                        [define if your get_sb_nodev needs a struct vfsmount argument],
 311                        [])
 312 ])
 313
 314
 315 AC_DEFUN([LINUX_STATFS_TAKES_DENTRY], [
 316   AC_CHECK_LINUX_BUILD([for dentry in statfs],
 317                        [ac_cv_linux_statfs_takes_dentry],
 318 [#include <linux/fs.h>
 319 #include <linux/statfs.h>],
 320 [extern int simple_statfs(struct dentry *, struct kstatfs *);],
 321                        [STATFS_TAKES_DENTRY],
 322                        [define if your statfs takes a dentry argument],
 323                        [])
 324 ])
 325
 326
 327 AC_DEFUN([LINUX_LINUX_KEYRING_SUPPORT], [
 328   AC_CHECK_LINUX_BUILD([for linux kernel keyring support],
 329                        [ac_cv_linux_keyring_support],
 330 [#include <linux/rwsem.h>
 331 #ifdef HAVE_LINUX_KEY_TYPE_H
 332 #include <linux/key-type.h>
 333 #endif
 334 #include <linux/key.h>
 335 #include <linux/keyctl.h>],
 336 [#ifdef CONFIG_KEYS
 337 request_key(NULL, NULL, NULL);
 338 #if !defined(KEY_POS_VIEW) || !defined(KEY_POS_SEARCH) || !defined(KEY_POS_SETATTR)
 339 #error "Your linux/key.h does not contain KEY_POS_VIEW or KEY_POS_SEARCH or KEY_POS_SETATTR"
 340 #endif
 341 #else
 342 #error rebuild your kernel with CONFIG_KEYS
 343 #endif],
 344                        [LINUX_KEYRING_SUPPORT],
 345                        [define if your kernel has keyring support],
 346                        [])
 347 ])
 348
 349
 350 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_STRUCT_TASK], [
 351   AC_CHECK_LINUX_BUILD([if key_alloc() takes a struct task *],
 352                         [ac_cv_key_alloc_needs_struct_task],
 353                         [#include <linux/rwsem.h>
 354                         #include <linux/key.h> ],
 355                         [struct task_struct *t=NULL;
 356                         (void) key_alloc(NULL, NULL, 0, 0, t, 0, 0);],
 357                         [KEY_ALLOC_NEEDS_STRUCT_TASK],
 358                         [define if key_alloc takes a struct task *],
 359                         [-Werror -Wno-pointer-arith])
 360 ])
 361
 362
 363 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_CRED], [
 364   AC_CHECK_LINUX_BUILD([if key_alloc() takes credentials],
 365                         [ac_cv_key_alloc_needs_cred],
 366                         [#include <linux/rwsem.h>
 367                         #include <linux/key.h>],
 368                         [struct cred *c = NULL;
 369                         (void) key_alloc(NULL, NULL, 0, 0, c, 0, 0);],
 370                         [KEY_ALLOC_NEEDS_CRED],
 371                         [define if key_alloc takes credentials],
 372                         [-Werror -Wno-pointer-arith])
 373 ])
 374
 375
 376 AC_DEFUN([LINUX_INIT_WORK_HAS_DATA], [
 377   AC_CHECK_LINUX_BUILD([whether INIT_WORK has a _data argument],
 378                        [ac_cv_linux_init_work_has_data],
 379 [#include <linux/kernel.h>
 380 #include <linux/workqueue.h>],
 381 [
 382 void f(struct work_struct *w) {}
 383 struct work_struct *w;
 384 int *i;
 385 INIT_WORK(w,f,i);],
 386                        [INIT_WORK_HAS_DATA],
 387                        [define if INIT_WORK takes a data (3rd) argument],
 388                        [])
 389 ])
 390
 391
 392 AC_DEFUN([LINUX_REGISTER_SYSCTL_TABLE_NOFLAG], [
 393   AC_CHECK_LINUX_BUILD([whether register_sysctl_table has an insert_at_head argument],
 394                        [ac_cv_linux_register_sysctl_table_noflag],
 395                        [#include <linux/sysctl.h>],
 396                        [ctl_table *t; register_sysctl_table (t);],
 397                        [REGISTER_SYSCTL_TABLE_NOFLAG],
 398                        [define if register_sysctl_table has no insert_at head flag],
 399                        [])
 400 ])
 401
 402
 403 AC_DEFUN([LINUX_FOP_F_FLUSH_TAKES_FL_OWNER_T], [
 404   AC_CHECK_LINUX_BUILD([whether file_operations.flush takes a fl_owner_t],
 405                        [ac_cv_linux_func_f_flush_takes_fl_owner_t],
 406                        [#include <linux/fs.h>],
 407 [struct inode _inode;
 408 struct file _file;
 409 fl_owner_t id;
 410 (void)_inode.i_fop->flush(&_file, &id);],
 411                        [FOP_FLUSH_TAKES_FL_OWNER_T],
 412                        [define if your fops.flush takes an fl_owner_t argument],
 413                        [])
 414 ])
 415
 416
 417 AC_DEFUN([LINUX_FOP_F_FSYNC_TAKES_DENTRY], [
 418   AC_CHECK_LINUX_BUILD([whether file_operations.fsync takes a dentry argument],
 419                        [ac_cv_linux_func_f_fsync_takes_dentry],
 420                        [#include <linux/fs.h>],
 421 [struct inode _inode;
 422 struct file _file;
 423 struct dentry _d;
 424 (void)_inode.i_fop->fsync(&_file, &_d, 0);],
 425                        [FOP_FSYNC_TAKES_DENTRY],
 426                        [define if your fops.fsync takes an dentry argument],
 427                        [])
 428 ])
 429
 430
 431 int (*fsync) (struct file *, loff_t start, loff_t end, int datasync);
 432
 433 AC_DEFUN([LINUX_FOP_F_FSYNC_TAKES_RANGE], [
 434   AC_CHECK_LINUX_BUILD([whether file_operations.fsync takes a range],
 435                        [ac_cv_linux_func_f_fsync_takes_range],
 436                        [#include <linux/fs.h>],
 437 [struct inode _inode;
 438 struct file _file;
 439 loff_t start, end;
 440 (void)_inode.i_fop->fsync(&_file, start, end, 0);],
 441                        [FOP_FSYNC_TAKES_RANGE],
 442                        [define if your fops.fsync takes range arguments],
 443                        [])
 444 ])
 445
 446
 447 AC_DEFUN([LINUX_HAVE_KMEM_CACHE_T], [
 448   AC_CHECK_LINUX_BUILD([whether kmem_cache_t exists],
 449                        [ac_cv_linux_have_kmem_cache_t],
 450                        [#include <linux/slab.h>],
 451                        [kmem_cache_t *k;],
 452                        [HAVE_KMEM_CACHE_T],
 453                        [define if kmem_cache_t exists],
 454                        [])
 455 ])
 456
 457
 458 AC_DEFUN([LINUX_KMEM_CACHE_CREATE_TAKES_DTOR], [
 459   AC_CHECK_LINUX_BUILD([whether kmem_cache_create takes a destructor argument],
 460                        [ac_cv_linux_kmem_cache_create_takes_dtor],
 461                        [#include <linux/slab.h>],
 462                        [kmem_cache_create(NULL, 0, 0, 0, NULL, NULL);],
 463                        [KMEM_CACHE_TAKES_DTOR],
 464                        [define if kmem_cache_create takes a destructor argument],
 465                        [])
 466 ])
 467
 468
 469 AC_DEFUN([LINUX_KMEM_CACHE_CREATE_CTOR_TAKES_VOID],[
 470   AC_CHECK_LINUX_BUILD([whether kmem_cache_create constructor takes a void pointer],
 471                         [ac_cv_linux_kmem_cache_create_ctor_takes_void],
 472                         [#include <linux/slab.h>],
 473                         [void _ctor(void *v) { }; kmem_cache_create(NULL, 0, 0, 0, _ctor);],
 474                         [KMEM_CACHE_CTOR_TAKES_VOID],
 475                         [define if kmem_cache_create constructor takes a single void ptr],
 476                         [-Werror])
 477 ])
 478
 479
 480 dnl This function checks not just the existence of the splice functions,
 481 dnl but also that the signature matches (they gained an extra argument
 482 dnl around 2.6.17)
 483 AC_DEFUN([LINUX_FS_STRUCT_FOP_HAS_SPLICE], [
 484   AC_CHECK_LINUX_BUILD([for splice_write and splice_read in struct file_operations],
 485                        [ac_cv_linux_fs_struct_fop_has_splice],
 486                        [#include <linux/fs.h>],
 487                        [struct file_operations _fop;
 488                         _fop.splice_write(NULL, NULL, NULL, 0, 0);
 489                         _fop.splice_read(NULL, NULL, NULL, 0, 0);],
 490                        [STRUCT_FILE_OPERATIONS_HAS_SPLICE],
 491                        [define if struct file_operations has splice functions],
 492                        [])
 493 ])
 494
 495
 496 AC_DEFUN([LINUX_KMEM_CACHE_INIT], [
 497   AC_CHECK_LINUX_BUILD([for new kmem_cache init function parameters],
 498                        [ac_cv_linux_kmem_cache_init],
 499                        [#include <linux/slab.h>],
 500                        [extern struct kmem_cache *
 501                         kmem_cache_create(const char *, size_t, size_t,
 502                                           unsigned long,
 503                                           void (*)(struct kmem_cache *, void *));
 504                         return;],
 505                        [KMEM_CACHE_INIT],
 506                        [define for new kmem_cache init function parameters],
 507                        [])
 508 ])
 509
 510
 511 AC_DEFUN([LINUX_EXPORTS_PROC_ROOT_FS], [
 512   AC_CHECK_LINUX_BUILD([if proc_root_fs is defined and exported],
 513                        [ac_cv_linux_exports_proc_root_fs],
 514                        [#include <linux/proc_fs.h>],
 515                        [struct proc_dir_entry *p = proc_root_fs;],
 516                        [EXPORTED_PROC_ROOT_FS],
 517                        [define if proc_root_fs is exported],
 518                        [])
 519 ])
 520
 521
 522 AC_DEFUN([LINUX_D_PATH_TAKES_STRUCT_PATH], [
 523   AC_CHECK_LINUX_BUILD([if d_path() takes a struct path argument],
 524                        [ac_cv_linux_d_path_takes_struct_path],
 525                        [#include <linux/fs.h>],
 526                        [struct path *p; d_path(p, NULL, 0);],
 527                        [D_PATH_TAKES_STRUCT_PATH],
 528                        [define if d_path() takes a struct path argument],
 529                        [])
 530 ])
 531
 532
 533 AC_DEFUN([LINUX_NEW_EXPORT_OPS], [
 534   AC_CHECK_LINUX_BUILD([if kernel uses new export ops],
 535                        [ac_cv_linux_new_export_ops],
 536                        [#include <linux/exportfs.h>],
 537                        [struct export_operations _eops;
 538                         _eops.fh_to_parent(NULL, NULL, 0, 0);],
 539                        [NEW_EXPORT_OPS],
 540                        [define if kernel uses new export ops],
 541                        [])
 542 ])
 543
 544
 545 AC_DEFUN([LINUX_POSIX_TEST_LOCK_RETURNS_CONFLICT], [
 546   AC_CHECK_LINUX_BUILD([if posix_test_lock returns a struct file_lock],
 547                        [ac_cv_linux_posix_test_lock_returns_conflict],
 548                        [#include <linux/fs.h>],
 549                        [struct file_lock *lock;
 550                         struct file * file;
 551                         lock = posix_test_lock(file, lock);],
 552                        [POSIX_TEST_LOCK_RETURNS_CONFLICT],
 553                        [define if posix_test_lock returns the conflicting lock],
 554                        [])
 555 ])
 556
 557
 558 AC_DEFUN([LINUX_POSIX_TEST_LOCK_CONFLICT_ARG], [
 559   AC_CHECK_LINUX_BUILD([if posix_test_lock takes a conflict argument],
 560                        [ac_cv_linux_posix_test_lock_conflict_arg],
 561                        [#include <linux/fs.h>],
 562                        [struct file_lock *lock;
 563                         struct file *file;
 564                         posix_test_lock(file, lock, lock);],
 565                        [POSIX_TEST_LOCK_CONFLICT_ARG],
 566                        [define if posix_test_lock takes a conflict argument],
 567                        [])
 568 ])
 569
 570
 571 AC_DEFUN([LINUX_EXPORTS_KEY_TYPE_KEYRING], [
 572   AC_CHECK_LINUX_BUILD([for exported key_type_keyring],
 573                        [ac_cv_linux_exports_key_type_keyring],
 574 [
 575 #ifdef HAVE_LINUX_KEY_TYPE_H
 576 #include <linux/key-type.h>
 577 #endif
 578 #include <linux/key.h>
 579 ],
 580                        [printk("%s", key_type_keyring.name);],
 581                        [EXPORTED_KEY_TYPE_KEYRING],
 582                        [define if key_type_keyring is exported],
 583                        [])
 584 ])
 585
 586
 587 AC_DEFUN([LINUX_HAVE_TRY_TO_FREEZE], [
 588   AC_CHECK_LINUX_BUILD([for try_to_freeze],
 589                        [ac_cv_linux_have_try_to_freeze],
 590 [#include <linux/sched.h>
 591 #ifdef HAVE_LINUX_FREEZER_H
 592 #include <linux/freezer.h>
 593 #endif],
 594 [#ifdef LINUX_REFRIGERATOR_TAKES_PF_FREEZE
 595    try_to_freeze(PF_FREEZE);
 596 #else
 597    try_to_freeze();
 598 #endif],
 599                        [HAVE_TRY_TO_FREEZE],
 600                        [define if your kernel has the try_to_freeze function],
 601                        [])
 602 ])
 603
 604
 605 AC_DEFUN([LINUX_HAVE_DCACHE_LOCK], [
 606   AC_CHECK_LINUX_BUILD([for dcache_lock],
 607                         [ac_cv_linux_have_dcache_lock],
 608                         [#include <linux/fs.h> ],
 609                         [printk("%p", &dcache_lock);],
 610                         [HAVE_DCACHE_LOCK],
 611                         [define if dcache_lock exists],
 612                         [])
 613 ])
 614
 615
 616 AC_DEFUN([LINUX_D_COUNT_IS_INT], [
 617   AC_CHECK_LINUX_BUILD([if dentry->d_count is an int],
 618                         [ac_cv_linux_d_count_int],
 619                         [#include <linux/fs.h> ],
 620                         [struct dentry _d;
 621                         dget(&_d);
 622                         _d.d_count = 1;],
 623                         [D_COUNT_INT],
 624                         [define if dentry->d_count is an int],
 625                         [-Werror])
 626 ])
 627
 628
 629 AC_DEFUN([LINUX_DOP_D_DELETE_TAKES_CONST], [
 630   AC_CHECK_LINUX_BUILD([whether dentry.d_op->d_delete takes a const argument],
 631                         [ac_cv_linux_dop_d_delete_takes_const],
 632                         [#include <linux/fs.h>
 633                         #include <linux/dcache.h>],
 634                         [struct dentry_operations _d_ops;
 635                         int _d_del(const struct dentry *de) {return 0;};
 636                         _d_ops.d_delete = _d_del;],
 637                         [DOP_D_DELETE_TAKES_CONST],
 638                         [define if dentry.d_op->d_delete takes a const argument],
 639                         [-Werror])
 640 ])
 641
 642
 643 AC_DEFUN([LINUX_IOP_MKDIR_TAKES_UMODE_T], [
 644   AC_CHECK_LINUX_BUILD([whether inode.i_op->mkdir takes a umode_t argument],
 645                         [ac_cv_linux_iop_mkdir_takes_umode_t],
 646                         [#include <linux/fs.h>],
 647                         [struct inode_operations _i_ops;
 648                         int _mkdir(struct inode *i, struct dentry *d, umode_t m) {return 0;};
 649                         _i_ops.mkdir = _mkdir;],
 650                         [IOP_MKDIR_TAKES_UMODE_T],
 651                         [define if inode.i_op->mkdir takes a umode_t argument],
 652                         [-Werror])
 653 ])
 654
 655
 656 AC_DEFUN([LINUX_IOP_CREATE_TAKES_UMODE_T], [
 657   AC_CHECK_LINUX_BUILD([whether inode.i_op->create takes a umode_t argument],
 658                         [ac_cv_linux_iop_create_takes_umode_t],
 659                         [#include <linux/fs.h>],
 660                         [struct inode_operations _i_ops;
 661                         int _create(struct inode *i, struct dentry *d, umode_t m, struct nameidata *n)
 662                                 {return 0;};
 663                         _i_ops.create = _create;],
 664                         [IOP_CREATE_TAKES_UMODE_T],
 665                         [define if inode.i_op->create takes a umode_t argument],
 666                         [-Werror])
 667 ])
 668
 669
 670 AC_DEFUN([LINUX_EXPORT_OP_ENCODE_FH_TAKES_INODES], [
 671   AC_CHECK_LINUX_BUILD([whether export operation encode_fh takes inode arguments],
 672                         [ac_cv_linux_export_op_encode_fh__takes_inodes],
 673                         [#include <linux/exportfs.h>],
 674                         [struct export_operations _exp_ops;
 675                         int _encode_fh(struct inode *i, __u32 *fh, int *len, struct inode *p)
 676                                 {return 0;};
 677                         _exp_ops.encode_fh = _encode_fh;],
 678                         [EXPORT_OP_ENCODE_FH_TAKES_INODES],
 679                         [define if encode_fh export op takes inode arguments],
 680                         [-Werror])
 681 ])
 682
 683
 684 AC_DEFUN([LINUX_KMAP_ATOMIC_TAKES_NO_KM_TYPE], [
 685   AC_CHECK_LINUX_BUILD([whether kmap_atomic takes no km_type argument],
 686                         [ac_cv_linux_kma_atomic_takes_no_km_type],
 687                         [#include <linux/highmem.h>],
 688                         [struct page *p = NULL;
 689                         kmap_atomic(p);],
 690                         [KMAP_ATOMIC_TAKES_NO_KM_TYPE],
 691                         [define if kmap_atomic takes no km_type argument],
 692                         [-Werror])
 693 ])
 694
 695
 696 AC_DEFUN([LINUX_DENTRY_OPEN_TAKES_PATH], [
 697   AC_CHECK_LINUX_BUILD([whether dentry_open takes a path argument],
 698                         [ac_cv_linux_dentry_open_takes_path],
 699                         [#include <linux/fs.h>],
 700                         [struct path p;
 701                         dentry_open(&p, 0, NULL);],
 702                         [DENTRY_OPEN_TAKES_PATH],
 703                         [define if dentry_open takes a path argument],
 704                         [-Werror])
 705 ])
 706
 707
 708 AC_DEFUN([LINUX_D_ALIAS_IS_HLIST], [
 709   AC_CHECK_LINUX_BUILD([whether dentry->d_alias is an hlist],
 710                         [ac_cv_linux_d_alias_is_hlist],
 711                         [#include <linux/fs.h>],
 712                         [struct dentry *d = NULL;
 713                         struct hlist_node *hn = NULL;
 714                         d->d_alias = *hn;],
 715                         [D_ALIAS_IS_HLIST],
 716                         [define if dentry->d_alias is an hlist],
 717                         [])
 718 ])
 719
 720
 721 AC_DEFUN([LINUX_HLIST_ITERATOR_NO_NODE], [
 722   AC_CHECK_LINUX_BUILD([whether hlist iterators don't need a node parameter],
 723                         [ac_cv_linux_hlist_takes_no_node],
 724                         [#include <linux/list.h>
 725                         #include <linux/fs.h>],
 726                         [struct dentry *d = NULL, *cur;
 727                         struct inode *ip;
 728                         hlist_for_each_entry(cur, &ip->i_dentry, d_alias) { }
 729                         ],
 730                         [HLIST_ITERATOR_NO_NODE],
 731                         [define if hlist iterators don't need a node parameter],
 732                         [])
 733 ])
 734
 735
 736 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_BOOL], [
 737   AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a bool],
 738                         [ac_cv_linux_func_i_create_takes_bool],
 739                         [#include <linux/fs.h>
 740                         #include <linux/namei.h>],
 741                         [struct inode _inode = {};
 742                         struct dentry _dentry;
 743                         bool b = true;
 744                         (void)_inode.i_op->create(&_inode, &_dentry, 0, b);],
 745                        [IOP_CREATE_TAKES_BOOL],
 746                        [define if your iops.create takes a bool argument],
 747                        [-Werror])
 748 ])
 749
 750
 751 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_UNSIGNED], [
 752   AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes an unsigned int],
 753                         [ac_cv_linux_func_d_revalidate_takes_unsigned],
 754                         [#include <linux/fs.h>
 755                         #include <linux/namei.h>],
 756                         [struct dentry_operations dops;
 757                         int reval(struct dentry *d, unsigned int i) { return 0; };
 758                         dops.d_revalidate = reval;],
 759                        [DOP_REVALIDATE_TAKES_UNSIGNED],
 760                        [define if your dops.d_revalidate takes an unsigned int argument],
 761                        [-Werror])
 762 ])
 763
 764
 765 AC_DEFUN([LINUX_IOP_LOOKUP_TAKES_UNSIGNED], [
 766   AC_CHECK_LINUX_BUILD([whether inode operation lookup takes an unsigned int],
 767                         [ac_cv_linux_func_lookup_takes_unsigned],
 768                         [#include <linux/fs.h>
 769                         #include <linux/namei.h>],
 770                         [struct inode_operations iops;
 771                         struct dentry *look(struct inode *i, struct dentry *d, unsigned int j) { return NULL; };
 772                         iops.lookup = look;],
 773                        [IOP_LOOKUP_TAKES_UNSIGNED],
 774                        [define if your iops.lookup takes an unsigned int argument],
 775                        [-Werror])
 776 ])