src/cf/linux-test4.m4

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