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Merge branch 'drm-fixes-4.20' of git://people.freedesktop.org/~agd5f/linux into drm...
[mirror_ubuntu-eoan-kernel.git] / include / linux / compat.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 2#ifndef _LINUX_COMPAT_H
3#define _LINUX_COMPAT_H
4/*
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
7 */
1da177e4 8
5180e3e2 9#include <linux/types.h>
9afc5eee 10#include <linux/time.h>
1da177e4
LT		 11
12#include <linux/stat.h>
13#include <linux/param.h> /* for HZ */
14#include <linux/sem.h>
2dceba14
AB		 15#include <linux/socket.h>
16#include <linux/if.h>
be84cb43 17#include <linux/fs.h>
45e9683e 18#include <linux/aio_abi.h> /* for aio_context_t */
fde9fc76 19#include <linux/uaccess.h>
f5b972e9 20#include <linux/unistd.h>
1da177e4
LT		 21
22#include <asm/compat.h>
2b5a9a37
AB		 23
24#ifdef CONFIG_COMPAT
1da177e4 25#include <asm/siginfo.h>
3f2e05e9 26#include <asm/signal.h>
5055c677 27#endif
1da177e4 28
7303e30e
DB		 29#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
30/*
31 * It may be useful for an architecture to override the definitions of the
32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
33 * to use a different calling convention for syscalls. To allow for that,
34 + the prototypes for the compat_sys_*() functions below will *not* be included
35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
36 */
37#include <asm/syscall_wrapper.h>
38#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
39
45e87781
L		 40#ifndef COMPAT_USE_64BIT_TIME
41#define COMPAT_USE_64BIT_TIME 0
42#endif
43
46836613 44#ifndef __SC_DELOUSE
4f59c718 45#define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
46836613
AV		 46#endif
47
7303e30e 48#ifndef COMPAT_SYSCALL_DEFINE0
217f4433 49#define COMPAT_SYSCALL_DEFINE0(name) \
c9a21195
HM		 50 asmlinkage long compat_sys_##name(void); \
51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
217f4433 52 asmlinkage long compat_sys_##name(void)
7303e30e 53#endif /* COMPAT_SYSCALL_DEFINE0 */
217f4433 54
46836613
AV		 55#define COMPAT_SYSCALL_DEFINE1(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
57#define COMPAT_SYSCALL_DEFINE2(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
59#define COMPAT_SYSCALL_DEFINE3(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
61#define COMPAT_SYSCALL_DEFINE4(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
63#define COMPAT_SYSCALL_DEFINE5(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
65#define COMPAT_SYSCALL_DEFINE6(name, ...) \
66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
67
5ac9efa3
DB		 68/*
69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
70 * sign-extends 32-bit ints to longs whenever needed. The actual work is
71 * done within __do_compat_sys_*().
72 */
7303e30e 73#ifndef COMPAT_SYSCALL_DEFINEx
5ac9efa3 74#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
bee20031
AB		 75 __diag_push(); \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
5ac9efa3
DB		 78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
85 { \
bee20031
AB		 86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
88 return ret; \
5ac9efa3 89 } \
bee20031 90 __diag_pop(); \
5ac9efa3 91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
7303e30e 92#endif /* COMPAT_SYSCALL_DEFINEx */
46836613 93
5055c677
DD		 94#ifdef CONFIG_COMPAT
95
9b064fc3
AV		 96#ifndef compat_user_stack_pointer
97#define compat_user_stack_pointer() current_user_stack_pointer()
98#endif
90268439
AV		 99#ifndef compat_sigaltstack /* we'll need that for MIPS */
100typedef struct compat_sigaltstack {
101 compat_uptr_t ss_sp;
102 int ss_flags;
103 compat_size_t ss_size;
104} compat_stack_t;
105#endif
22839869
WD		 106#ifndef COMPAT_MINSIGSTKSZ
107#define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
108#endif
90268439 109
1da177e4
LT		 110#define compat_jiffies_to_clock_t(x) \
111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
112
202e5979
SR		 113typedef __compat_uid32_t compat_uid_t;
114typedef __compat_gid32_t compat_gid_t;
115
5d0e5283 116struct compat_sel_arg_struct;
1da177e4
LT		 117struct rusage;
118
1da177e4 119struct compat_itimerval {
9afc5eee
AB		 120 struct old_timeval32 it_interval;
121 struct old_timeval32 it_value;
1da177e4
LT		 122};
123
54ad9c46
AV		 124struct itimerval;
125int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
127
1da177e4
LT		 128struct compat_tms {
129 compat_clock_t tms_utime;
130 compat_clock_t tms_stime;
131 compat_clock_t tms_cutime;
132 compat_clock_t tms_cstime;
133};
134
88959ea9
SR		 135struct compat_timex {
136 compat_uint_t modes;
137 compat_long_t offset;
138 compat_long_t freq;
139 compat_long_t maxerror;
140 compat_long_t esterror;
141 compat_int_t status;
142 compat_long_t constant;
143 compat_long_t precision;
144 compat_long_t tolerance;
9afc5eee 145 struct old_timeval32 time;
88959ea9
SR		 146 compat_long_t tick;
147 compat_long_t ppsfreq;
148 compat_long_t jitter;
149 compat_int_t shift;
150 compat_long_t stabil;
151 compat_long_t jitcnt;
152 compat_long_t calcnt;
153 compat_long_t errcnt;
154 compat_long_t stbcnt;
153b5d05 155 compat_int_t tai;
88959ea9 156
4800a5bb
CM		 157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
158 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
159 compat_int_t:32; compat_int_t:32; compat_int_t:32;
88959ea9
SR		 160};
161
3a4d44b6
AV		 162struct timex;
163int compat_get_timex(struct timex *, const struct compat_timex __user *);
164int compat_put_timex(struct compat_timex __user *, const struct timex *);
165
1da177e4
LT		 166#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
167
168typedef struct {
169 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
170} compat_sigset_t;
171
08d32fe5 172struct compat_sigaction {
2a148698 173#ifndef __ARCH_HAS_IRIX_SIGACTION
08d32fe5
AV		 174 compat_uptr_t sa_handler;
175 compat_ulong_t sa_flags;
176#else
2a148698 177 compat_uint_t sa_flags;
08d32fe5
AV		 178 compat_uptr_t sa_handler;
179#endif
180#ifdef __ARCH_HAS_SA_RESTORER
181 compat_uptr_t sa_restorer;
182#endif
183 compat_sigset_t sa_mask __packed;
184};
08d32fe5 185
b713da69
AV		 186typedef union compat_sigval {
187 compat_int_t sival_int;
188 compat_uptr_t sival_ptr;
189} compat_sigval_t;
190
191typedef struct compat_siginfo {
192 int si_signo;
193#ifndef __ARCH_HAS_SWAPPED_SIGINFO
194 int si_errno;
195 int si_code;
196#else
197 int si_code;
198 int si_errno;
199#endif
200
201 union {
202 int _pad[128/sizeof(int) - 3];
203
204 /* kill() */
205 struct {
206 compat_pid_t _pid; /* sender's pid */
207 __compat_uid32_t _uid; /* sender's uid */
208 } _kill;
209
210 /* POSIX.1b timers */
211 struct {
212 compat_timer_t _tid; /* timer id */
213 int _overrun; /* overrun count */
214 compat_sigval_t _sigval; /* same as below */
215 } _timer;
216
217 /* POSIX.1b signals */
218 struct {
219 compat_pid_t _pid; /* sender's pid */
220 __compat_uid32_t _uid; /* sender's uid */
221 compat_sigval_t _sigval;
222 } _rt;
223
224 /* SIGCHLD */
225 struct {
226 compat_pid_t _pid; /* which child */
227 __compat_uid32_t _uid; /* sender's uid */
228 int _status; /* exit code */
229 compat_clock_t _utime;
230 compat_clock_t _stime;
231 } _sigchld;
232
233#ifdef CONFIG_X86_X32_ABI
234 /* SIGCHLD (x32 version) */
235 struct {
236 compat_pid_t _pid; /* which child */
237 __compat_uid32_t _uid; /* sender's uid */
238 int _status; /* exit code */
239 compat_s64 _utime;
240 compat_s64 _stime;
241 } _sigchld_x32;
242#endif
243
244 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
245 struct {
246 compat_uptr_t _addr; /* faulting insn/memory ref. */
247#ifdef __ARCH_SI_TRAPNO
248 int _trapno; /* TRAP # which caused the signal */
249#endif
8420f719
EB		 250#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
251 sizeof(short) : __alignof__(compat_uptr_t))
b713da69 252 union {
b68a68d3
EB		 253 /*
254 * used when si_code=BUS_MCEERR_AR or
255 * used when si_code=BUS_MCEERR_AO
256 */
257 short int _addr_lsb; /* Valid LSB of the reported address. */
b713da69
AV		 258 /* used when si_code=SEGV_BNDERR */
259 struct {
8420f719 260 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
b713da69
AV		 261 compat_uptr_t _lower;
262 compat_uptr_t _upper;
263 } _addr_bnd;
264 /* used when si_code=SEGV_PKUERR */
b68a68d3 265 struct {
8420f719 266 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
b68a68d3
EB		 267 u32 _pkey;
268 } _addr_pkey;
b713da69
AV		 269 };
270 } _sigfault;
271
272 /* SIGPOLL */
273 struct {
274 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
275 int _fd;
276 } _sigpoll;
277
278 struct {
279 compat_uptr_t _call_addr; /* calling user insn */
280 int _syscall; /* triggering system call number */
281 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
282 } _sigsys;
283 } _sifields;
284} compat_siginfo_t;
285
6684ba20
PA		 286/*
287 * These functions operate on 32- or 64-bit specs depending on
81993e81 288 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
6684ba20
PA		 289 */
290extern int compat_get_timespec(struct timespec *, const void __user *);
291extern int compat_put_timespec(const struct timespec *, void __user *);
292extern int compat_get_timeval(struct timeval *, const void __user *);
293extern int compat_put_timeval(const struct timeval *, void __user *);
1da177e4
LT		 294
295struct compat_iovec {
296 compat_uptr_t iov_base;
297 compat_size_t iov_len;
298};
299
300struct compat_rlimit {
301 compat_ulong_t rlim_cur;
302 compat_ulong_t rlim_max;
303};
304
305struct compat_rusage {
9afc5eee
AB		 306 struct old_timeval32 ru_utime;
307 struct old_timeval32 ru_stime;
1da177e4
LT		 308 compat_long_t ru_maxrss;
309 compat_long_t ru_ixrss;
310 compat_long_t ru_idrss;
311 compat_long_t ru_isrss;
312 compat_long_t ru_minflt;
313 compat_long_t ru_majflt;
314 compat_long_t ru_nswap;
315 compat_long_t ru_inblock;
316 compat_long_t ru_oublock;
317 compat_long_t ru_msgsnd;
318 compat_long_t ru_msgrcv;
319 compat_long_t ru_nsignals;
320 compat_long_t ru_nvcsw;
321 compat_long_t ru_nivcsw;
322};
323
4800a5bb
CM		 324extern int put_compat_rusage(const struct rusage *,
325 struct compat_rusage __user *);
1da177e4
LT		 326
327struct compat_siginfo;
7a074e96 328struct __compat_aio_sigset;
1da177e4 329
1da177e4
LT		 330struct compat_dirent {
331 u32 d_ino;
332 compat_off_t d_off;
333 u16 d_reclen;
334 char d_name[256];
335};
336
2b1c6bd7
CH		 337struct compat_ustat {
338 compat_daddr_t f_tfree;
339 compat_ino_t f_tinode;
340 char f_fname[6];
341 char f_fpack[6];
342};
343
1da177e4
LT		 344#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
345
346typedef struct compat_sigevent {
347 compat_sigval_t sigev_value;
348 compat_int_t sigev_signo;
349 compat_int_t sigev_notify;
350 union {
351 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
352 compat_int_t _tid;
353
354 struct {
355 compat_uptr_t _function;
356 compat_uptr_t _attribute;
357 } _sigev_thread;
358 } _sigev_un;
359} compat_sigevent_t;
360
2dceba14
AB		 361struct compat_ifmap {
362 compat_ulong_t mem_start;
363 compat_ulong_t mem_end;
364 unsigned short base_addr;
365 unsigned char irq;
366 unsigned char dma;
367 unsigned char port;
368};
369
4800a5bb 370struct compat_if_settings {
7a50a240
AB		 371 unsigned int type; /* Type of physical device or protocol */
372 unsigned int size; /* Size of the data allocated by the caller */
373 compat_uptr_t ifs_ifsu; /* union of pointers */
374};
375
2dceba14 376struct compat_ifreq {
7a50a240
AB		 377 union {
378 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
379 } ifr_ifrn;
380 union {
381 struct sockaddr ifru_addr;
382 struct sockaddr ifru_dstaddr;
383 struct sockaddr ifru_broadaddr;
384 struct sockaddr ifru_netmask;
385 struct sockaddr ifru_hwaddr;
386 short ifru_flags;
387 compat_int_t ifru_ivalue;
388 compat_int_t ifru_mtu;
389 struct compat_ifmap ifru_map;
390 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
2dceba14 391 char ifru_newname[IFNAMSIZ];
7a50a240
AB		 392 compat_caddr_t ifru_data;
393 struct compat_if_settings ifru_settings;
394 } ifr_ifru;
2dceba14
AB		 395};
396
397struct compat_ifconf {
4800a5bb
CM		 398 compat_int_t ifc_len; /* size of buffer */
399 compat_caddr_t ifcbuf;
2dceba14
AB		 400};
401
34f192c6
IM		 402struct compat_robust_list {
403 compat_uptr_t next;
404};
405
406struct compat_robust_list_head {
407 struct compat_robust_list list;
408 compat_long_t futex_offset;
409 compat_uptr_t list_op_pending;
410};
411
495dfbf7
AV		 412#ifdef CONFIG_COMPAT_OLD_SIGACTION
413struct compat_old_sigaction {
414 compat_uptr_t sa_handler;
415 compat_old_sigset_t sa_mask;
416 compat_ulong_t sa_flags;
417 compat_uptr_t sa_restorer;
418};
419#endif
420
f1c316a3
SM		 421struct compat_keyctl_kdf_params {
422 compat_uptr_t hashname;
423 compat_uptr_t otherinfo;
424 __u32 otherinfolen;
425 __u32 __spare[8];
426};
427
be84cb43
CM		 428struct compat_statfs;
429struct compat_statfs64;
430struct compat_old_linux_dirent;
431struct compat_linux_dirent;
432struct linux_dirent64;
433struct compat_msghdr;
434struct compat_mmsghdr;
435struct compat_sysinfo;
436struct compat_sysctl_args;
437struct compat_kexec_segment;
438struct compat_mq_attr;
48b25c43 439struct compat_msgbuf;
be84cb43 440
34f192c6
IM		 441extern void compat_exit_robust_list(struct task_struct *curr);
442
1da177e4
LT		 443#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
444
1e1fc133 445#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
1da177e4 446
5fa3839a 447long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
1da177e4
LT		 448 unsigned long bitmap_size);
449long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
450 unsigned long bitmap_size);
ae7795bc
EB		 451int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
452int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
1da177e4
LT		 453int get_compat_sigevent(struct sigevent *event,
454 const struct compat_sigevent __user *u_event);
455
9afc5eee
AB		 456static inline int old_timeval32_compare(struct old_timeval32 *lhs,
457 struct old_timeval32 *rhs)
643a6545
AM		 458{
459 if (lhs->tv_sec < rhs->tv_sec)
460 return -1;
461 if (lhs->tv_sec > rhs->tv_sec)
462 return 1;
463 return lhs->tv_usec - rhs->tv_usec;
464}
465
9afc5eee
AB		 466static inline int old_timespec32_compare(struct old_timespec32 *lhs,
467 struct old_timespec32 *rhs)
643a6545
AM		 468{
469 if (lhs->tv_sec < rhs->tv_sec)
470 return -1;
471 if (lhs->tv_sec > rhs->tv_sec)
472 return 1;
473 return lhs->tv_nsec - rhs->tv_nsec;
474}
475
3968cf62 476extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
fde9fc76
MR		 477
478/*
479 * Defined inline such that size can be compile time constant, which avoids
480 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
481 */
482static inline int
483put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
484 unsigned int size)
485{
486 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
487#ifdef __BIG_ENDIAN
488 compat_sigset_t v;
489 switch (_NSIG_WORDS) {
490 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
89976005 491 /* fall through */
fde9fc76 492 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
89976005 493 /* fall through */
fde9fc76 494 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
89976005 495 /* fall through */
fde9fc76
MR		 496 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
497 }
498 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
499#else
500 return copy_to_user(compat, set, size) ? -EFAULT : 0;
501#endif
502}
bebfa101 503
032d82d9
RM		 504extern int compat_ptrace_request(struct task_struct *child,
505 compat_long_t request,
506 compat_ulong_t addr, compat_ulong_t data);
507
c269f196
RM		 508extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
509 compat_ulong_t addr, compat_ulong_t data);
c269f196 510
c679a089
DB		 511struct epoll_event; /* fortunately, this one is fixed-layout */
512
513extern ssize_t compat_rw_copy_check_uvector(int type,
514 const struct compat_iovec __user *uvector,
515 unsigned long nr_segs,
516 unsigned long fast_segs, struct iovec *fast_pointer,
517 struct iovec **ret_pointer);
518
519extern void __user *compat_alloc_user_space(unsigned long len);
520
521int compat_restore_altstack(const compat_stack_t __user *uss);
522int __compat_save_altstack(compat_stack_t __user *, unsigned long);
523#define compat_save_altstack_ex(uss, sp) do { \
524 compat_stack_t __user *__uss = uss; \
525 struct task_struct *t = current; \
526 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
527 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
528 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
529 if (t->sas_ss_flags & SS_AUTODISARM) \
530 sas_ss_reset(t); \
531} while (0);
532
f6dfb4fd 533/*
c679a089 534 * These syscall function prototypes are kept in the same order as
3e2052e5
DB		 535 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
536 * go below.
c679a089
DB		 537 *
538 * Please note that these prototypes here are only provided for information
539 * purposes, for static analysis, and for linking from the syscall table.
540 * These functions should not be called elsewhere from kernel code.
7303e30e
DB		 541 *
542 * As the syscall calling convention may be different from the default
543 * for architectures overriding the syscall calling convention, do not
544 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
f6dfb4fd 545 */
7303e30e 546#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
c679a089
DB		 547asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
548asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
549 u32 __user *iocb);
550asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
551 compat_long_t min_nr,
552 compat_long_t nr,
553 struct io_event __user *events,
9afc5eee 554 struct old_timespec32 __user *timeout);
7a074e96
CH		 555asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
556 compat_long_t min_nr,
557 compat_long_t nr,
558 struct io_event __user *events,
9afc5eee 559 struct old_timespec32 __user *timeout,
7a074e96 560 const struct __compat_aio_sigset __user *usig);
c679a089
DB		 561
562/* fs/cookies.c */
563asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
564
565/* fs/eventpoll.c */
f6dfb4fd 566asmlinkage long compat_sys_epoll_pwait(int epfd,
35280bd4 567 struct epoll_event __user *events,
f6dfb4fd
DL		 568 int maxevents, int timeout,
569 const compat_sigset_t __user *sigmask,
570 compat_size_t sigsetsize);
571
c679a089
DB		 572/* fs/fcntl.c */
573asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
574 compat_ulong_t arg);
575asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
576 compat_ulong_t arg);
97416ce8 577
c679a089
DB		 578/* fs/ioctl.c */
579asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
580 compat_ulong_t arg);
140ff8b0 581
c679a089
DB		 582/* fs/namespace.c */
583asmlinkage long compat_sys_mount(const char __user *dev_name,
584 const char __user *dir_name,
585 const char __user *type, compat_ulong_t flags,
586 const void __user *data);
587
588/* fs/open.c */
be84cb43
CM		 589asmlinkage long compat_sys_statfs(const char __user *pathname,
590 struct compat_statfs __user *buf);
be84cb43
CM		 591asmlinkage long compat_sys_statfs64(const char __user *pathname,
592 compat_size_t sz,
593 struct compat_statfs64 __user *buf);
c679a089
DB		 594asmlinkage long compat_sys_fstatfs(unsigned int fd,
595 struct compat_statfs __user *buf);
be84cb43
CM		 596asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
597 struct compat_statfs64 __user *buf);
c679a089
DB		 598asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
599asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
600/* No generic prototype for truncate64, ftruncate64, fallocate */
601asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
602 int flags, umode_t mode);
603
604/* fs/readdir.c */
be84cb43
CM		 605asmlinkage long compat_sys_getdents(unsigned int fd,
606 struct compat_linux_dirent __user *dirent,
607 unsigned int count);
c679a089
DB		 608
609/* fs/read_write.c */
610asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
611asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
612 const struct compat_iovec __user *vec, compat_ulong_t vlen);
613asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
614 const struct compat_iovec __user *vec, compat_ulong_t vlen);
615/* No generic prototype for pread64 and pwrite64 */
616asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
617 const struct compat_iovec __user *vec,
618 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
619asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
620 const struct compat_iovec __user *vec,
621 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
622#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
623asmlinkage long compat_sys_preadv64(unsigned long fd,
624 const struct compat_iovec __user *vec,
625 unsigned long vlen, loff_t pos);
626#endif
627
628#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
629asmlinkage long compat_sys_pwritev64(unsigned long fd,
630 const struct compat_iovec __user *vec,
631 unsigned long vlen, loff_t pos);
632#endif
633
634/* fs/sendfile.c */
635asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
636 compat_off_t __user *offset, compat_size_t count);
637asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
638 compat_loff_t __user *offset, compat_size_t count);
639
640/* fs/select.c */
be84cb43
CM		 641asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
642 compat_ulong_t __user *outp,
643 compat_ulong_t __user *exp,
9afc5eee 644 struct old_timespec32 __user *tsp,
be84cb43
CM		 645 void __user *sig);
646asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
647 unsigned int nfds,
9afc5eee 648 struct old_timespec32 __user *tsp,
be84cb43
CM		 649 const compat_sigset_t __user *sigmask,
650 compat_size_t sigsetsize);
c679a089
DB		 651
652/* fs/signalfd.c */
be84cb43
CM		 653asmlinkage long compat_sys_signalfd4(int ufd,
654 const compat_sigset_t __user *sigmask,
655 compat_size_t sigsetsize, int flags);
be84cb43 656
c679a089
DB		 657/* fs/splice.c */
658asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
659 unsigned int nr_segs, unsigned int flags);
660
661/* fs/stat.c */
662asmlinkage long compat_sys_newfstatat(unsigned int dfd,
663 const char __user *filename,
664 struct compat_stat __user *statbuf,
665 int flag);
666asmlinkage long compat_sys_newfstat(unsigned int fd,
667 struct compat_stat __user *statbuf);
668
669/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
670
671/* fs/timerfd.c */
672asmlinkage long compat_sys_timerfd_gettime(int ufd,
9afc5eee 673 struct old_itimerspec32 __user *otmr);
c679a089 674asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
9afc5eee
AB		 675 const struct old_itimerspec32 __user *utmr,
676 struct old_itimerspec32 __user *otmr);
c679a089
DB		 677
678/* fs/utimes.c */
679asmlinkage long compat_sys_utimensat(unsigned int dfd,
680 const char __user *filename,
9afc5eee 681 struct old_timespec32 __user *t,
c679a089
DB		 682 int flags);
683
684/* kernel/exit.c */
685asmlinkage long compat_sys_waitid(int, compat_pid_t,
686 struct compat_siginfo __user *, int,
687 struct compat_rusage __user *);
688
689
690
691/* kernel/futex.c */
692asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
9afc5eee 693 struct old_timespec32 __user *utime, u32 __user *uaddr2,
c679a089
DB		 694 u32 val3);
695asmlinkage long
696compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
697 compat_size_t len);
698asmlinkage long
699compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
700 compat_size_t __user *len_ptr);
701
702/* kernel/hrtimer.c */
9afc5eee
AB		 703asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
704 struct old_timespec32 __user *rmtp);
c679a089
DB		 705
706/* kernel/itimer.c */
be84cb43
CM		 707asmlinkage long compat_sys_getitimer(int which,
708 struct compat_itimerval __user *it);
709asmlinkage long compat_sys_setitimer(int which,
710 struct compat_itimerval __user *in,
711 struct compat_itimerval __user *out);
c679a089
DB		 712
713/* kernel/kexec.c */
714asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
715 compat_ulong_t nr_segments,
716 struct compat_kexec_segment __user *,
717 compat_ulong_t flags);
718
719/* kernel/posix-timers.c */
be84cb43
CM		 720asmlinkage long compat_sys_timer_create(clockid_t which_clock,
721 struct compat_sigevent __user *timer_event_spec,
722 timer_t __user *created_timer_id);
c679a089 723asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
9afc5eee 724 struct old_itimerspec32 __user *setting);
be84cb43 725asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
9afc5eee
AB		 726 struct old_itimerspec32 __user *new,
727 struct old_itimerspec32 __user *old);
be84cb43 728asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
9afc5eee 729 struct old_timespec32 __user *tp);
be84cb43 730asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
9afc5eee 731 struct old_timespec32 __user *tp);
be84cb43 732asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
9afc5eee 733 struct old_timespec32 __user *tp);
be84cb43 734asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
9afc5eee
AB		 735 struct old_timespec32 __user *rqtp,
736 struct old_timespec32 __user *rmtp);
c679a089
DB		 737
738/* kernel/ptrace.c */
739asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
740 compat_long_t addr, compat_long_t data);
741
742/* kernel/sched/core.c */
743asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
744 unsigned int len,
745 compat_ulong_t __user *user_mask_ptr);
746asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
747 unsigned int len,
748 compat_ulong_t __user *user_mask_ptr);
749asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
9afc5eee 750 struct old_timespec32 __user *interval);
c679a089
DB		 751
752/* kernel/signal.c */
753asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
754 compat_stack_t __user *uoss_ptr);
be84cb43
CM		 755asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
756 compat_size_t sigsetsize);
08d32fe5 757#ifndef CONFIG_ODD_RT_SIGACTION
08d32fe5
AV		 758asmlinkage long compat_sys_rt_sigaction(int,
759 const struct compat_sigaction __user *,
760 struct compat_sigaction __user *,
761 compat_size_t);
762#endif
c679a089
DB		 763asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
764 compat_sigset_t __user *oset,
765 compat_size_t sigsetsize);
766asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
767 compat_size_t sigsetsize);
768asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
769 struct compat_siginfo __user *uinfo,
9afc5eee 770 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
75907d4d
AV		 771asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
772 struct compat_siginfo __user *uinfo);
c679a089
DB		 773/* No generic prototype for rt_sigreturn */
774
775/* kernel/sys.c */
776asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
777asmlinkage long compat_sys_getrlimit(unsigned int resource,
778 struct compat_rlimit __user *rlim);
779asmlinkage long compat_sys_setrlimit(unsigned int resource,
780 struct compat_rlimit __user *rlim);
781asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
782
783/* kernel/time.c */
9afc5eee 784asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
c679a089 785 struct timezone __user *tz);
9afc5eee 786asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
c679a089
DB		 787 struct timezone __user *tz);
788asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
789
790/* kernel/timer.c */
be84cb43 791asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
c679a089
DB		 792
793/* ipc/mqueue.c */
be84cb43
CM		 794asmlinkage long compat_sys_mq_open(const char __user *u_name,
795 int oflag, compat_mode_t mode,
796 struct compat_mq_attr __user *u_attr);
797asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
798 const char __user *u_msg_ptr,
8eee9093 799 compat_size_t msg_len, unsigned int msg_prio,
9afc5eee 800 const struct old_timespec32 __user *u_abs_timeout);
be84cb43
CM		 801asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
802 char __user *u_msg_ptr,
8eee9093 803 compat_size_t msg_len, unsigned int __user *u_msg_prio,
9afc5eee 804 const struct old_timespec32 __user *u_abs_timeout);
c679a089
DB		 805asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
806 const struct compat_sigevent __user *u_notification);
807asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
808 const struct compat_mq_attr __user *u_mqstat,
809 struct compat_mq_attr __user *u_omqstat);
4c696ba7 810
c679a089
DB		 811/* ipc/msg.c */
812asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
813asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
814 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
815asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
816 compat_ssize_t msgsz, int msgflg);
c41d68a5 817
c679a089
DB		 818/* ipc/sem.c */
819asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
820asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
9afc5eee 821 unsigned nsems, const struct old_timespec32 __user *timeout);
c679a089
DB		 822
823/* ipc/shm.c */
824asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
825asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
826
827/* net/socket.c */
828asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
829 unsigned flags, struct sockaddr __user *addr,
830 int __user *addrlen);
831asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
832 char __user *optval, unsigned int optlen);
833asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
834 char __user *optval, int __user *optlen);
835asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
836 unsigned flags);
837asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
838 unsigned int flags);
839
840/* mm/filemap.c: No generic prototype for readahead */
c41d68a5 841
c679a089
DB		 842/* security/keys/keyctl.c */
843asmlinkage long compat_sys_keyctl(u32 option,
844 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
845
846/* arch/example/kernel/sys_example.c */
847asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
848 const compat_uptr_t __user *envp);
849
850/* mm/fadvise.c: No generic prototype for fadvise64_64 */
851
852/* mm/, CONFIG_MMU only */
853asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
854 compat_ulong_t mode,
855 compat_ulong_t __user *nmask,
856 compat_ulong_t maxnode, compat_ulong_t flags);
857asmlinkage long compat_sys_get_mempolicy(int __user *policy,
858 compat_ulong_t __user *nmask,
859 compat_ulong_t maxnode,
860 compat_ulong_t addr,
861 compat_ulong_t flags);
862asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
863 compat_ulong_t maxnode);
864asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
865 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
866 const compat_ulong_t __user *new_nodes);
867asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
868 __u32 __user *pages,
869 const int __user *nodes,
870 int __user *status,
871 int flags);
872
873asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
874 compat_pid_t pid, int sig,
875 struct compat_siginfo __user *uinfo);
876asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
877 unsigned vlen, unsigned int flags,
9afc5eee 878 struct old_timespec32 __user *timeout);
c679a089
DB		 879asmlinkage long compat_sys_wait4(compat_pid_t pid,
880 compat_uint_t __user *stat_addr, int options,
881 struct compat_rusage __user *ru);
882asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
883 int, const char __user *);
884asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
885 struct file_handle __user *handle,
886 int flags);
887asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
888 struct compat_timex __user *tp);
889asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
890 unsigned vlen, unsigned int flags);
a67ba43d
CM		 891asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
892 const struct compat_iovec __user *lvec,
2f2728f6
HC		 893 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
894 compat_ulong_t riovcnt, compat_ulong_t flags);
a67ba43d
CM		 895asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
896 const struct compat_iovec __user *lvec,
2f2728f6
HC		 897 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
898 compat_ulong_t riovcnt, compat_ulong_t flags);
c679a089
DB		 899asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
900 const compat_uptr_t __user *argv,
901 const compat_uptr_t __user *envp, int flags);
902asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
903 const struct compat_iovec __user *vec,
904 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
905asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
906 const struct compat_iovec __user *vec,
907 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
908#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
909asmlinkage long compat_sys_readv64v2(unsigned long fd,
910 const struct compat_iovec __user *vec,
911 unsigned long vlen, loff_t pos, rwf_t flags);
912#endif
a67ba43d 913
c679a089
DB		 914#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
915asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
916 const struct compat_iovec __user *vec,
917 unsigned long vlen, loff_t pos, rwf_t flags);
918#endif
919
920
c679a089
DB		 921/*
922 * Deprecated system calls which are still defined in
923 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
924 */
925
926/* __ARCH_WANT_SYSCALL_NO_AT */
927asmlinkage long compat_sys_open(const char __user *filename, int flags,
928 umode_t mode);
929asmlinkage long compat_sys_utimes(const char __user *filename,
9afc5eee 930 struct old_timeval32 __user *t);
c679a089
DB		 931
932/* __ARCH_WANT_SYSCALL_NO_FLAGS */
933asmlinkage long compat_sys_signalfd(int ufd,
934 const compat_sigset_t __user *sigmask,
935 compat_size_t sigsetsize);
936
937/* __ARCH_WANT_SYSCALL_OFF_T */
938asmlinkage long compat_sys_newstat(const char __user *filename,
939 struct compat_stat __user *statbuf);
940asmlinkage long compat_sys_newlstat(const char __user *filename,
941 struct compat_stat __user *statbuf);
942
943/* __ARCH_WANT_SYSCALL_DEPRECATED */
9afc5eee 944asmlinkage long compat_sys_time(old_time32_t __user *tloc);
c679a089 945asmlinkage long compat_sys_utime(const char __user *filename,
4faea239 946 struct old_utimbuf32 __user *t);
c679a089
DB		 947asmlinkage long compat_sys_futimesat(unsigned int dfd,
948 const char __user *filename,
9afc5eee 949 struct old_timeval32 __user *t);
c679a089
DB		 950asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
951 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
9afc5eee 952 struct old_timeval32 __user *tvp);
c679a089
DB		 953asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
954asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
955 unsigned flags);
956asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
957
958/* obsolete: fs/readdir.c */
959asmlinkage long compat_sys_old_readdir(unsigned int fd,
960 struct compat_old_linux_dirent __user *,
961 unsigned int count);
962
963/* obsolete: fs/select.c */
964asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
965
966/* obsolete: ipc */
967asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
90268439 968
c679a089 969/* obsolete: kernel/signal.c */
e9fb8b7e
CM		 970#ifdef __ARCH_WANT_SYS_SIGPENDING
971asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
972#endif
973
974#ifdef __ARCH_WANT_SYS_SIGPROCMASK
975asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
976 compat_old_sigset_t __user *oset);
977#endif
c679a089
DB		 978#ifdef CONFIG_COMPAT_OLD_SIGACTION
979asmlinkage long compat_sys_sigaction(int sig,
980 const struct compat_old_sigaction __user *act,
981 struct compat_old_sigaction __user *oact);
982#endif
e9fb8b7e 983
c679a089 984/* obsolete: kernel/time/time.c */
9afc5eee 985asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
0ad50c38 986
c679a089
DB		 987/* obsolete: net/socket.c */
988asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
5180e3e2 989
7303e30e
DB		 990#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
991
79170fda 992
5180e3e2
AL		 993/*
994 * For most but not all architectures, "am I in a compat syscall?" and
995 * "am I a compat task?" are the same question. For architectures on which
996 * they aren't the same question, arch code can override in_compat_syscall.
997 */
998
999#ifndef in_compat_syscall
1000static inline bool in_compat_syscall(void) { return is_compat_task(); }
1001#endif
1002
cd19c364 1003/**
9afc5eee 1004 * ns_to_old_timeval32 - Compat version of ns_to_timeval
cd19c364
FW		 1005 * @nsec: the nanoseconds value to be converted
1006 *
9afc5eee 1007 * Returns the old_timeval32 representation of the nsec parameter.
cd19c364 1008 */
9afc5eee 1009static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
cd19c364
FW		 1010{
1011 struct timeval tv;
9afc5eee 1012 struct old_timeval32 ctv;
cd19c364
FW		 1013
1014 tv = ns_to_timeval(nsec);
1015 ctv.tv_sec = tv.tv_sec;
1016 ctv.tv_usec = tv.tv_usec;
1017
1018 return ctv;
1019}
1020
9b54bf9d
MR		 1021/*
1022 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1023 * directly. Instead, use one of the functions which work equivalently, such
1024 * as the kcompat_sys_xyzyyz() functions prototyped below.
1025 */
1026
1027int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1028 struct compat_statfs64 __user * buf);
1029int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1030 struct compat_statfs64 __user * buf);
1031
cd19c364 1032#else /* !CONFIG_COMPAT */
3c761ea0
LT		 1033
1034#define is_compat_task() (0)
a846446b
DS		 1035/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
1036#define in_compat_syscall in_compat_syscall
5180e3e2 1037static inline bool in_compat_syscall(void) { return false; }
3c761ea0 1038
1da177e4 1039#endif /* CONFIG_COMPAT */
5180e3e2 1040
1da177e4 1041#endif /* _LINUX_COMPAT_H */
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