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2df5e8bc SR |
1 | #ifndef _ARCH_POWERPC_UACCESS_H |
2 | #define _ARCH_POWERPC_UACCESS_H | |
3 | ||
4 | #ifdef __KERNEL__ | |
5 | #ifndef __ASSEMBLY__ | |
6 | ||
7 | #include <linux/sched.h> | |
8 | #include <linux/errno.h> | |
9 | #include <asm/processor.h> | |
6bfd93c3 | 10 | #include <asm/page.h> |
2df5e8bc SR |
11 | |
12 | #define VERIFY_READ 0 | |
13 | #define VERIFY_WRITE 1 | |
14 | ||
15 | /* | |
16 | * The fs value determines whether argument validity checking should be | |
17 | * performed or not. If get_fs() == USER_DS, checking is performed, with | |
18 | * get_fs() == KERNEL_DS, checking is bypassed. | |
19 | * | |
20 | * For historical reasons, these macros are grossly misnamed. | |
21 | * | |
22 | * The fs/ds values are now the highest legal address in the "segment". | |
23 | * This simplifies the checking in the routines below. | |
24 | */ | |
25 | ||
26 | #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) | |
27 | ||
5015b494 | 28 | #define KERNEL_DS MAKE_MM_SEG(~0UL) |
2df5e8bc | 29 | #ifdef __powerpc64__ |
5015b494 SR |
30 | /* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */ |
31 | #define USER_DS MAKE_MM_SEG(TASK_SIZE_USER64 - 1) | |
2df5e8bc | 32 | #else |
2df5e8bc SR |
33 | #define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) |
34 | #endif | |
35 | ||
36 | #define get_ds() (KERNEL_DS) | |
37 | #define get_fs() (current->thread.fs) | |
38 | #define set_fs(val) (current->thread.fs = (val)) | |
39 | ||
40 | #define segment_eq(a, b) ((a).seg == (b).seg) | |
41 | ||
42 | #ifdef __powerpc64__ | |
43 | /* | |
5015b494 SR |
44 | * This check is sufficient because there is a large enough |
45 | * gap between user addresses and the kernel addresses | |
2df5e8bc SR |
46 | */ |
47 | #define __access_ok(addr, size, segment) \ | |
5015b494 | 48 | (((addr) <= (segment).seg) && ((size) <= (segment).seg)) |
2df5e8bc SR |
49 | |
50 | #else | |
51 | ||
52 | #define __access_ok(addr, size, segment) \ | |
53 | (((addr) <= (segment).seg) && \ | |
54 | (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) | |
55 | ||
56 | #endif | |
57 | ||
58 | #define access_ok(type, addr, size) \ | |
59 | (__chk_user_ptr(addr), \ | |
60 | __access_ok((__force unsigned long)(addr), (size), get_fs())) | |
61 | ||
62 | /* | |
63 | * The exception table consists of pairs of addresses: the first is the | |
64 | * address of an instruction that is allowed to fault, and the second is | |
65 | * the address at which the program should continue. No registers are | |
66 | * modified, so it is entirely up to the continuation code to figure out | |
67 | * what to do. | |
68 | * | |
69 | * All the routines below use bits of fixup code that are out of line | |
70 | * with the main instruction path. This means when everything is well, | |
71 | * we don't even have to jump over them. Further, they do not intrude | |
72 | * on our cache or tlb entries. | |
73 | */ | |
74 | ||
75 | struct exception_table_entry { | |
76 | unsigned long insn; | |
77 | unsigned long fixup; | |
78 | }; | |
79 | ||
80 | /* | |
81 | * These are the main single-value transfer routines. They automatically | |
82 | * use the right size if we just have the right pointer type. | |
83 | * | |
84 | * This gets kind of ugly. We want to return _two_ values in "get_user()" | |
85 | * and yet we don't want to do any pointers, because that is too much | |
86 | * of a performance impact. Thus we have a few rather ugly macros here, | |
87 | * and hide all the ugliness from the user. | |
88 | * | |
89 | * The "__xxx" versions of the user access functions are versions that | |
90 | * do not verify the address space, that must have been done previously | |
91 | * with a separate "access_ok()" call (this is used when we do multiple | |
92 | * accesses to the same area of user memory). | |
93 | * | |
94 | * As we use the same address space for kernel and user data on the | |
95 | * PowerPC, we can just do these as direct assignments. (Of course, the | |
96 | * exception handling means that it's no longer "just"...) | |
97 | * | |
98 | * The "user64" versions of the user access functions are versions that | |
99 | * allow access of 64-bit data. The "get_user" functions do not | |
100 | * properly handle 64-bit data because the value gets down cast to a long. | |
101 | * The "put_user" functions already handle 64-bit data properly but we add | |
102 | * "user64" versions for completeness | |
103 | */ | |
104 | #define get_user(x, ptr) \ | |
105 | __get_user_check((x), (ptr), sizeof(*(ptr))) | |
106 | #define put_user(x, ptr) \ | |
107 | __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) | |
108 | ||
109 | #define __get_user(x, ptr) \ | |
110 | __get_user_nocheck((x), (ptr), sizeof(*(ptr))) | |
111 | #define __put_user(x, ptr) \ | |
112 | __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) | |
e68c825b | 113 | |
2df5e8bc SR |
114 | #ifndef __powerpc64__ |
115 | #define __get_user64(x, ptr) \ | |
116 | __get_user64_nocheck((x), (ptr), sizeof(*(ptr))) | |
117 | #define __put_user64(x, ptr) __put_user(x, ptr) | |
118 | #endif | |
119 | ||
e68c825b BH |
120 | #define __get_user_inatomic(x, ptr) \ |
121 | __get_user_nosleep((x), (ptr), sizeof(*(ptr))) | |
122 | #define __put_user_inatomic(x, ptr) \ | |
123 | __put_user_nosleep((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) | |
124 | ||
2df5e8bc SR |
125 | #define __get_user_unaligned __get_user |
126 | #define __put_user_unaligned __put_user | |
2df5e8bc SR |
127 | |
128 | extern long __put_user_bad(void); | |
129 | ||
2df5e8bc SR |
130 | /* |
131 | * We don't tell gcc that we are accessing memory, but this is OK | |
132 | * because we do not write to any memory gcc knows about, so there | |
133 | * are no aliasing issues. | |
134 | */ | |
135 | #define __put_user_asm(x, addr, err, op) \ | |
136 | __asm__ __volatile__( \ | |
137 | "1: " op " %1,0(%2) # put_user\n" \ | |
138 | "2:\n" \ | |
139 | ".section .fixup,\"ax\"\n" \ | |
140 | "3: li %0,%3\n" \ | |
141 | " b 2b\n" \ | |
142 | ".previous\n" \ | |
143 | ".section __ex_table,\"a\"\n" \ | |
3ddfbcf1 DG |
144 | " .balign %5\n" \ |
145 | PPC_LONG "1b,3b\n" \ | |
2df5e8bc SR |
146 | ".previous" \ |
147 | : "=r" (err) \ | |
3ddfbcf1 DG |
148 | : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\ |
149 | "i"(sizeof(unsigned long))) | |
2df5e8bc | 150 | |
5015b494 SR |
151 | #ifdef __powerpc64__ |
152 | #define __put_user_asm2(x, ptr, retval) \ | |
153 | __put_user_asm(x, ptr, retval, "std") | |
154 | #else /* __powerpc64__ */ | |
2df5e8bc SR |
155 | #define __put_user_asm2(x, addr, err) \ |
156 | __asm__ __volatile__( \ | |
157 | "1: stw %1,0(%2)\n" \ | |
158 | "2: stw %1+1,4(%2)\n" \ | |
159 | "3:\n" \ | |
160 | ".section .fixup,\"ax\"\n" \ | |
161 | "4: li %0,%3\n" \ | |
162 | " b 3b\n" \ | |
163 | ".previous\n" \ | |
164 | ".section __ex_table,\"a\"\n" \ | |
3ddfbcf1 DG |
165 | " .balign %5\n" \ |
166 | PPC_LONG "1b,4b\n" \ | |
167 | PPC_LONG "2b,4b\n" \ | |
2df5e8bc SR |
168 | ".previous" \ |
169 | : "=r" (err) \ | |
3ddfbcf1 DG |
170 | : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\ |
171 | "i"(sizeof(unsigned long))) | |
2df5e8bc SR |
172 | #endif /* __powerpc64__ */ |
173 | ||
174 | #define __put_user_size(x, ptr, size, retval) \ | |
175 | do { \ | |
176 | retval = 0; \ | |
177 | switch (size) { \ | |
178 | case 1: __put_user_asm(x, ptr, retval, "stb"); break; \ | |
179 | case 2: __put_user_asm(x, ptr, retval, "sth"); break; \ | |
180 | case 4: __put_user_asm(x, ptr, retval, "stw"); break; \ | |
181 | case 8: __put_user_asm2(x, ptr, retval); break; \ | |
182 | default: __put_user_bad(); \ | |
183 | } \ | |
184 | } while (0) | |
185 | ||
186 | #define __put_user_nocheck(x, ptr, size) \ | |
187 | ({ \ | |
188 | long __pu_err; \ | |
6bfd93c3 PM |
189 | __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ |
190 | if (!is_kernel_addr((unsigned long)__pu_addr)) \ | |
191 | might_sleep(); \ | |
2df5e8bc | 192 | __chk_user_ptr(ptr); \ |
6bfd93c3 | 193 | __put_user_size((x), __pu_addr, (size), __pu_err); \ |
2df5e8bc SR |
194 | __pu_err; \ |
195 | }) | |
196 | ||
197 | #define __put_user_check(x, ptr, size) \ | |
198 | ({ \ | |
199 | long __pu_err = -EFAULT; \ | |
200 | __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ | |
201 | might_sleep(); \ | |
202 | if (access_ok(VERIFY_WRITE, __pu_addr, size)) \ | |
203 | __put_user_size((x), __pu_addr, (size), __pu_err); \ | |
204 | __pu_err; \ | |
205 | }) | |
206 | ||
e68c825b BH |
207 | #define __put_user_nosleep(x, ptr, size) \ |
208 | ({ \ | |
209 | long __pu_err; \ | |
210 | __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ | |
211 | __chk_user_ptr(ptr); \ | |
212 | __put_user_size((x), __pu_addr, (size), __pu_err); \ | |
213 | __pu_err; \ | |
214 | }) | |
215 | ||
216 | ||
2df5e8bc SR |
217 | extern long __get_user_bad(void); |
218 | ||
219 | #define __get_user_asm(x, addr, err, op) \ | |
220 | __asm__ __volatile__( \ | |
5015b494 | 221 | "1: "op" %1,0(%2) # get_user\n" \ |
2df5e8bc SR |
222 | "2:\n" \ |
223 | ".section .fixup,\"ax\"\n" \ | |
224 | "3: li %0,%3\n" \ | |
225 | " li %1,0\n" \ | |
226 | " b 2b\n" \ | |
227 | ".previous\n" \ | |
228 | ".section __ex_table,\"a\"\n" \ | |
3ddfbcf1 DG |
229 | " .balign %5\n" \ |
230 | PPC_LONG "1b,3b\n" \ | |
2df5e8bc SR |
231 | ".previous" \ |
232 | : "=r" (err), "=r" (x) \ | |
3ddfbcf1 DG |
233 | : "b" (addr), "i" (-EFAULT), "0" (err), \ |
234 | "i"(sizeof(unsigned long))) | |
2df5e8bc | 235 | |
5015b494 SR |
236 | #ifdef __powerpc64__ |
237 | #define __get_user_asm2(x, addr, err) \ | |
238 | __get_user_asm(x, addr, err, "ld") | |
239 | #else /* __powerpc64__ */ | |
240 | #define __get_user_asm2(x, addr, err) \ | |
2df5e8bc SR |
241 | __asm__ __volatile__( \ |
242 | "1: lwz %1,0(%2)\n" \ | |
243 | "2: lwz %1+1,4(%2)\n" \ | |
244 | "3:\n" \ | |
245 | ".section .fixup,\"ax\"\n" \ | |
246 | "4: li %0,%3\n" \ | |
247 | " li %1,0\n" \ | |
248 | " li %1+1,0\n" \ | |
249 | " b 3b\n" \ | |
250 | ".previous\n" \ | |
251 | ".section __ex_table,\"a\"\n" \ | |
3ddfbcf1 DG |
252 | " .balign %5\n" \ |
253 | PPC_LONG "1b,4b\n" \ | |
254 | PPC_LONG "2b,4b\n" \ | |
2df5e8bc SR |
255 | ".previous" \ |
256 | : "=r" (err), "=&r" (x) \ | |
3ddfbcf1 DG |
257 | : "b" (addr), "i" (-EFAULT), "0" (err), \ |
258 | "i"(sizeof(unsigned long))) | |
2df5e8bc SR |
259 | #endif /* __powerpc64__ */ |
260 | ||
261 | #define __get_user_size(x, ptr, size, retval) \ | |
262 | do { \ | |
263 | retval = 0; \ | |
264 | __chk_user_ptr(ptr); \ | |
5015b494 SR |
265 | if (size > sizeof(x)) \ |
266 | (x) = __get_user_bad(); \ | |
2df5e8bc SR |
267 | switch (size) { \ |
268 | case 1: __get_user_asm(x, ptr, retval, "lbz"); break; \ | |
269 | case 2: __get_user_asm(x, ptr, retval, "lhz"); break; \ | |
270 | case 4: __get_user_asm(x, ptr, retval, "lwz"); break; \ | |
271 | case 8: __get_user_asm2(x, ptr, retval); break; \ | |
272 | default: (x) = __get_user_bad(); \ | |
273 | } \ | |
274 | } while (0) | |
275 | ||
276 | #define __get_user_nocheck(x, ptr, size) \ | |
277 | ({ \ | |
278 | long __gu_err; \ | |
279 | unsigned long __gu_val; \ | |
6bfd93c3 | 280 | const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ |
2df5e8bc | 281 | __chk_user_ptr(ptr); \ |
6bfd93c3 PM |
282 | if (!is_kernel_addr((unsigned long)__gu_addr)) \ |
283 | might_sleep(); \ | |
284 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
2df5e8bc SR |
285 | (x) = (__typeof__(*(ptr)))__gu_val; \ |
286 | __gu_err; \ | |
287 | }) | |
288 | ||
289 | #ifndef __powerpc64__ | |
290 | #define __get_user64_nocheck(x, ptr, size) \ | |
291 | ({ \ | |
292 | long __gu_err; \ | |
293 | long long __gu_val; \ | |
6bfd93c3 | 294 | const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ |
2df5e8bc | 295 | __chk_user_ptr(ptr); \ |
6bfd93c3 PM |
296 | if (!is_kernel_addr((unsigned long)__gu_addr)) \ |
297 | might_sleep(); \ | |
298 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
2df5e8bc SR |
299 | (x) = (__typeof__(*(ptr)))__gu_val; \ |
300 | __gu_err; \ | |
301 | }) | |
302 | #endif /* __powerpc64__ */ | |
303 | ||
304 | #define __get_user_check(x, ptr, size) \ | |
305 | ({ \ | |
306 | long __gu_err = -EFAULT; \ | |
307 | unsigned long __gu_val = 0; \ | |
308 | const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ | |
5015b494 | 309 | might_sleep(); \ |
2df5e8bc SR |
310 | if (access_ok(VERIFY_READ, __gu_addr, (size))) \ |
311 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
312 | (x) = (__typeof__(*(ptr)))__gu_val; \ | |
313 | __gu_err; \ | |
314 | }) | |
315 | ||
e68c825b BH |
316 | #define __get_user_nosleep(x, ptr, size) \ |
317 | ({ \ | |
318 | long __gu_err; \ | |
319 | unsigned long __gu_val; \ | |
320 | const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ | |
321 | __chk_user_ptr(ptr); \ | |
322 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
323 | (x) = (__typeof__(*(ptr)))__gu_val; \ | |
324 | __gu_err; \ | |
325 | }) | |
326 | ||
327 | ||
2df5e8bc SR |
328 | /* more complex routines */ |
329 | ||
330 | extern unsigned long __copy_tofrom_user(void __user *to, | |
331 | const void __user *from, unsigned long size); | |
332 | ||
333 | #ifndef __powerpc64__ | |
5015b494 | 334 | |
4cfbdfff | 335 | static inline unsigned long copy_from_user(void *to, |
5015b494 | 336 | const void __user *from, unsigned long n) |
2df5e8bc SR |
337 | { |
338 | unsigned long over; | |
339 | ||
340 | if (access_ok(VERIFY_READ, from, n)) | |
341 | return __copy_tofrom_user((__force void __user *)to, from, n); | |
342 | if ((unsigned long)from < TASK_SIZE) { | |
343 | over = (unsigned long)from + n - TASK_SIZE; | |
344 | return __copy_tofrom_user((__force void __user *)to, from, | |
345 | n - over) + over; | |
346 | } | |
347 | return n; | |
348 | } | |
349 | ||
4cfbdfff | 350 | static inline unsigned long copy_to_user(void __user *to, |
5015b494 | 351 | const void *from, unsigned long n) |
2df5e8bc SR |
352 | { |
353 | unsigned long over; | |
354 | ||
355 | if (access_ok(VERIFY_WRITE, to, n)) | |
356 | return __copy_tofrom_user(to, (__force void __user *)from, n); | |
357 | if ((unsigned long)to < TASK_SIZE) { | |
358 | over = (unsigned long)to + n - TASK_SIZE; | |
359 | return __copy_tofrom_user(to, (__force void __user *)from, | |
360 | n - over) + over; | |
361 | } | |
362 | return n; | |
363 | } | |
364 | ||
365 | #else /* __powerpc64__ */ | |
366 | ||
5015b494 SR |
367 | #define __copy_in_user(to, from, size) \ |
368 | __copy_tofrom_user((to), (from), (size)) | |
369 | ||
370 | extern unsigned long copy_from_user(void *to, const void __user *from, | |
371 | unsigned long n); | |
372 | extern unsigned long copy_to_user(void __user *to, const void *from, | |
373 | unsigned long n); | |
374 | extern unsigned long copy_in_user(void __user *to, const void __user *from, | |
375 | unsigned long n); | |
376 | ||
48fe4871 SR |
377 | #endif /* __powerpc64__ */ |
378 | ||
5015b494 SR |
379 | static inline unsigned long __copy_from_user_inatomic(void *to, |
380 | const void __user *from, unsigned long n) | |
2df5e8bc SR |
381 | { |
382 | if (__builtin_constant_p(n) && (n <= 8)) { | |
383 | unsigned long ret; | |
384 | ||
385 | switch (n) { | |
386 | case 1: | |
387 | __get_user_size(*(u8 *)to, from, 1, ret); | |
388 | break; | |
389 | case 2: | |
390 | __get_user_size(*(u16 *)to, from, 2, ret); | |
391 | break; | |
392 | case 4: | |
393 | __get_user_size(*(u32 *)to, from, 4, ret); | |
394 | break; | |
395 | case 8: | |
396 | __get_user_size(*(u64 *)to, from, 8, ret); | |
397 | break; | |
398 | } | |
48fe4871 SR |
399 | if (ret == 0) |
400 | return 0; | |
2df5e8bc | 401 | } |
48fe4871 | 402 | return __copy_tofrom_user((__force void __user *)to, from, n); |
2df5e8bc SR |
403 | } |
404 | ||
5015b494 SR |
405 | static inline unsigned long __copy_to_user_inatomic(void __user *to, |
406 | const void *from, unsigned long n) | |
2df5e8bc SR |
407 | { |
408 | if (__builtin_constant_p(n) && (n <= 8)) { | |
409 | unsigned long ret; | |
410 | ||
411 | switch (n) { | |
412 | case 1: | |
413 | __put_user_size(*(u8 *)from, (u8 __user *)to, 1, ret); | |
414 | break; | |
415 | case 2: | |
416 | __put_user_size(*(u16 *)from, (u16 __user *)to, 2, ret); | |
417 | break; | |
418 | case 4: | |
419 | __put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret); | |
420 | break; | |
421 | case 8: | |
422 | __put_user_size(*(u64 *)from, (u64 __user *)to, 8, ret); | |
423 | break; | |
424 | } | |
48fe4871 SR |
425 | if (ret == 0) |
426 | return 0; | |
2df5e8bc | 427 | } |
48fe4871 | 428 | return __copy_tofrom_user(to, (__force const void __user *)from, n); |
2df5e8bc SR |
429 | } |
430 | ||
5015b494 SR |
431 | static inline unsigned long __copy_from_user(void *to, |
432 | const void __user *from, unsigned long size) | |
2df5e8bc SR |
433 | { |
434 | might_sleep(); | |
2df5e8bc | 435 | return __copy_from_user_inatomic(to, from, size); |
2df5e8bc SR |
436 | } |
437 | ||
5015b494 SR |
438 | static inline unsigned long __copy_to_user(void __user *to, |
439 | const void *from, unsigned long size) | |
2df5e8bc SR |
440 | { |
441 | might_sleep(); | |
2df5e8bc | 442 | return __copy_to_user_inatomic(to, from, size); |
2df5e8bc SR |
443 | } |
444 | ||
2df5e8bc SR |
445 | extern unsigned long __clear_user(void __user *addr, unsigned long size); |
446 | ||
447 | static inline unsigned long clear_user(void __user *addr, unsigned long size) | |
448 | { | |
449 | might_sleep(); | |
450 | if (likely(access_ok(VERIFY_WRITE, addr, size))) | |
451 | return __clear_user(addr, size); | |
2df5e8bc SR |
452 | if ((unsigned long)addr < TASK_SIZE) { |
453 | unsigned long over = (unsigned long)addr + size - TASK_SIZE; | |
454 | return __clear_user(addr, size - over) + over; | |
455 | } | |
2df5e8bc SR |
456 | return size; |
457 | } | |
458 | ||
459 | extern int __strncpy_from_user(char *dst, const char __user *src, long count); | |
460 | ||
461 | static inline long strncpy_from_user(char *dst, const char __user *src, | |
462 | long count) | |
463 | { | |
464 | might_sleep(); | |
465 | if (likely(access_ok(VERIFY_READ, src, 1))) | |
466 | return __strncpy_from_user(dst, src, count); | |
467 | return -EFAULT; | |
468 | } | |
469 | ||
470 | /* | |
471 | * Return the size of a string (including the ending 0) | |
472 | * | |
473 | * Return 0 for error | |
474 | */ | |
2df5e8bc | 475 | extern int __strnlen_user(const char __user *str, long len, unsigned long top); |
2df5e8bc SR |
476 | |
477 | /* | |
478 | * Returns the length of the string at str (including the null byte), | |
479 | * or 0 if we hit a page we can't access, | |
480 | * or something > len if we didn't find a null byte. | |
481 | * | |
482 | * The `top' parameter to __strnlen_user is to make sure that | |
483 | * we can never overflow from the user area into kernel space. | |
484 | */ | |
485 | static inline int strnlen_user(const char __user *str, long len) | |
486 | { | |
2df5e8bc SR |
487 | unsigned long top = current->thread.fs.seg; |
488 | ||
489 | if ((unsigned long)str > top) | |
490 | return 0; | |
491 | return __strnlen_user(str, len, top); | |
2df5e8bc SR |
492 | } |
493 | ||
494 | #define strlen_user(str) strnlen_user((str), 0x7ffffffe) | |
495 | ||
496 | #endif /* __ASSEMBLY__ */ | |
497 | #endif /* __KERNEL__ */ | |
498 | ||
499 | #endif /* _ARCH_POWERPC_UACCESS_H */ |