disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/kernel.h
..
..
@@ -2,19 +2,23 @@
2
2
 #ifndef _LINUX_KERNEL_H
3
3
 #define _LINUX_KERNEL_H
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4
 
5
+
5
6
 #include <stdarg.h>
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+#include <linux/limits.h>
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8
 #include <linux/linkage.h>
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9
 #include <linux/stddef.h>
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10
 #include <linux/types.h>
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11
 #include <linux/compiler.h>
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12
 #include <linux/bitops.h>
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+#include <linux/kstrtox.h>
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 #include <linux/log2.h>
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+#include <linux/minmax.h>
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 #include <linux/typecheck.h>
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 #include <linux/printk.h>
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18
 #include <linux/build_bug.h>
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 #include <asm/byteorder.h>
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+#include <asm/div64.h>
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21
 #include <uapi/linux/kernel.h>
17
-#include <linux/limits.h>
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22
 
19
23
 #define STACK_MAGIC	0xdeadbeef
20
24
 
..
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@@ -31,6 +35,7 @@
31
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 #define ALIGN_DOWN(x, a)	__ALIGN_KERNEL((x) - ((a) - 1), (a))
32
36
 #define __ALIGN_MASK(x, mask)	__ALIGN_KERNEL_MASK((x), (mask))
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 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
38
+#define PTR_ALIGN_DOWN(p, a)	((typeof(p))ALIGN_DOWN((unsigned long)(p), (a)))
34
39
 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
35
40
 
36
41
 /* generic data direction definitions */
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@@ -42,6 +47,8 @@
42
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  * @arr: array to be sized
43
48
  */
44
49
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
50
+
51
+#define PTR_IF(cond, ptr)	((cond) ? (ptr) : NULL)
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52
 
46
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 #define u64_to_user_ptr(x) (		\
47
54
 {					\
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@@ -76,14 +83,7 @@
76
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  */
77
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 #define round_down(x, y) ((x) & ~__round_mask(x, y))
78
85
 
79
-/**
80
- * FIELD_SIZEOF - get the size of a struct's field
81
- * @t: the target struct
82
- * @f: the target struct's field
83
- * Return: the size of @f in the struct definition without having a
84
- * declared instance of @t.
85
- */
86
-#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
86
+#define typeof_member(T, m)	typeof(((T*)0)->m)
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87
 
88
88
 #define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
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89
 
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@@ -106,12 +106,10 @@
106
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  *
107
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  * Rounds @x up to next multiple of @y. If @y will always be a power
108
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  * of 2, consider using the faster round_up().
109
- *
110
- * The `const' here prevents gcc-3.3 from calling __divdi3
111
109
  */
112
110
 #define roundup(x, y) (					\
113
111
 {							\
114
-	const typeof(y) __y = y;			\
112
+	typeof(y) __y = y;				\
115
113
 	(((x) + (__y - 1)) / __y) * __y;		\
116
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 }							\
117
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 )
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@@ -176,19 +174,7 @@
176
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 #define _RET_IP_		(unsigned long)__builtin_return_address(0)
177
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 #define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
178
176
 
179
-#ifdef CONFIG_LBDAF
180
-# include <asm/div64.h>
181
-# define sector_div(a, b) do_div(a, b)
182
-#else
183
-# define sector_div(n, b)( \
184
-{ \
185
-	int _res; \
186
-	_res = (n) % (b); \
187
-	(n) /= (b); \
188
-	_res; \
189
-} \
190
-)
191
-#endif
177
+#define sector_div(a, b) do_div(a, b)
192
178
 
193
179
 /**
194
180
  * upper_32_bits - return bits 32-63 of a number
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..
@@ -204,7 +190,7 @@
204
190
  * lower_32_bits - return bits 0-31 of a number
205
191
  * @n: the number we're accessing
206
192
  */
207
-#define lower_32_bits(n) ((u32)(n))
193
+#define lower_32_bits(n) ((u32)((n) & 0xffffffff))
208
194
 
209
195
 struct completion;
210
196
 struct pt_regs;
..
..
@@ -218,13 +204,17 @@
218
204
 #endif
219
205
 
220
206
 #ifdef CONFIG_DEBUG_ATOMIC_SLEEP
221
-  void ___might_sleep(const char *file, int line, int preempt_offset);
222
-  void __might_sleep(const char *file, int line, int preempt_offset);
207
+extern void ___might_sleep(const char *file, int line, int preempt_offset);
208
+extern void __might_sleep(const char *file, int line, int preempt_offset);
209
+extern void __cant_sleep(const char *file, int line, int preempt_offset);
210
+
223
211
 /**
224
212
  * might_sleep - annotation for functions that can sleep
225
213
  *
226
214
  * this macro will print a stack trace if it is executed in an atomic
227
- * context (spinlock, irq-handler, ...).
215
+ * context (spinlock, irq-handler, ...). Additional sections where blocking is
216
+ * not allowed can be annotated with non_block_start() and non_block_end()
217
+ * pairs.
228
218
  *
229
219
  * This is a useful debugging help to be able to catch problems early and not
230
220
  * be bitten later when the calling function happens to sleep when it is not
..
..
@@ -232,21 +222,51 @@
232
222
  */
233
223
 # define might_sleep() \
234
224
 	do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
235
-
236
-# define might_sleep_no_state_check() \
237
-	do { ___might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
225
+/**
226
+ * cant_sleep - annotation for functions that cannot sleep
227
+ *
228
+ * this macro will print a stack trace if it is executed with preemption enabled
229
+ */
230
+# define cant_sleep() \
231
+	do { __cant_sleep(__FILE__, __LINE__, 0); } while (0)
238
232
 # define sched_annotate_sleep()	(current->task_state_change = 0)
233
+/**
234
+ * non_block_start - annotate the start of section where sleeping is prohibited
235
+ *
236
+ * This is on behalf of the oom reaper, specifically when it is calling the mmu
237
+ * notifiers. The problem is that if the notifier were to block on, for example,
238
+ * mutex_lock() and if the process which holds that mutex were to perform a
239
+ * sleeping memory allocation, the oom reaper is now blocked on completion of
240
+ * that memory allocation. Other blocking calls like wait_event() pose similar
241
+ * issues.
242
+ */
243
+# define non_block_start() (current->non_block_count++)
244
+/**
245
+ * non_block_end - annotate the end of section where sleeping is prohibited
246
+ *
247
+ * Closes a section opened by non_block_start().
248
+ */
249
+# define non_block_end() WARN_ON(current->non_block_count-- == 0)
239
250
 #else
240
251
   static inline void ___might_sleep(const char *file, int line,
241
252
 				   int preempt_offset) { }
242
253
   static inline void __might_sleep(const char *file, int line,
243
254
 				   int preempt_offset) { }
244
255
 # define might_sleep() do { might_resched(); } while (0)
245
-# define might_sleep_no_state_check() do { might_resched(); } while (0)
256
+# define cant_sleep() do { } while (0)
246
257
 # define sched_annotate_sleep() do { } while (0)
258
+# define non_block_start() do { } while (0)
259
+# define non_block_end() do { } while (0)
247
260
 #endif
248
261
 
249
262
 #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
263
+
264
+#ifndef CONFIG_PREEMPT_RT
265
+# define cant_migrate()		cant_sleep()
266
+#else
267
+  /* Placeholder for now */
268
+# define cant_migrate()		do { } while (0)
269
+#endif
250
270
 
251
271
 /**
252
272
  * abs - return absolute value of an argument
..
..
@@ -299,157 +319,16 @@
299
319
 #endif
300
320
 
301
321
 extern struct atomic_notifier_head panic_notifier_list;
302
-extern void (*vendor_panic_cb)(u64 sp);
303
322
 extern long (*panic_blink)(int state);
304
323
 __printf(1, 2)
305
324
 void panic(const char *fmt, ...) __noreturn __cold;
306
325
 void nmi_panic(struct pt_regs *regs, const char *msg);
326
+void check_panic_on_warn(const char *origin);
307
327
 extern void oops_enter(void);
308
328
 extern void oops_exit(void);
309
-void print_oops_end_marker(void);
310
-extern int oops_may_print(void);
329
+extern bool oops_may_print(void);
311
330
 void do_exit(long error_code) __noreturn;
312
331
 void complete_and_exit(struct completion *, long) __noreturn;
313
-
314
-#ifdef CONFIG_ARCH_HAS_REFCOUNT
315
-void refcount_error_report(struct pt_regs *regs, const char *err);
316
-#else
317
-static inline void refcount_error_report(struct pt_regs *regs, const char *err)
318
-{ }
319
-#endif
320
-
321
-/* Internal, do not use. */
322
-int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
323
-int __must_check _kstrtol(const char *s, unsigned int base, long *res);
324
-
325
-int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
326
-int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
327
-
328
-/**
329
- * kstrtoul - convert a string to an unsigned long
330
- * @s: The start of the string. The string must be null-terminated, and may also
331
- *  include a single newline before its terminating null. The first character
332
- *  may also be a plus sign, but not a minus sign.
333
- * @base: The number base to use. The maximum supported base is 16. If base is
334
- *  given as 0, then the base of the string is automatically detected with the
335
- *  conventional semantics - If it begins with 0x the number will be parsed as a
336
- *  hexadecimal (case insensitive), if it otherwise begins with 0, it will be
337
- *  parsed as an octal number. Otherwise it will be parsed as a decimal.
338
- * @res: Where to write the result of the conversion on success.
339
- *
340
- * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
341
- * Used as a replacement for the obsolete simple_strtoull. Return code must
342
- * be checked.
343
-*/
344
-static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
345
-{
346
-	/*
347
-	 * We want to shortcut function call, but
348
-	 * __builtin_types_compatible_p(unsigned long, unsigned long long) = 0.
349
-	 */
350
-	if (sizeof(unsigned long) == sizeof(unsigned long long) &&
351
-	    __alignof__(unsigned long) == __alignof__(unsigned long long))
352
-		return kstrtoull(s, base, (unsigned long long *)res);
353
-	else
354
-		return _kstrtoul(s, base, res);
355
-}
356
-
357
-/**
358
- * kstrtol - convert a string to a long
359
- * @s: The start of the string. The string must be null-terminated, and may also
360
- *  include a single newline before its terminating null. The first character
361
- *  may also be a plus sign or a minus sign.
362
- * @base: The number base to use. The maximum supported base is 16. If base is
363
- *  given as 0, then the base of the string is automatically detected with the
364
- *  conventional semantics - If it begins with 0x the number will be parsed as a
365
- *  hexadecimal (case insensitive), if it otherwise begins with 0, it will be
366
- *  parsed as an octal number. Otherwise it will be parsed as a decimal.
367
- * @res: Where to write the result of the conversion on success.
368
- *
369
- * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
370
- * Used as a replacement for the obsolete simple_strtoull. Return code must
371
- * be checked.
372
- */
373
-static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
374
-{
375
-	/*
376
-	 * We want to shortcut function call, but
377
-	 * __builtin_types_compatible_p(long, long long) = 0.
378
-	 */
379
-	if (sizeof(long) == sizeof(long long) &&
380
-	    __alignof__(long) == __alignof__(long long))
381
-		return kstrtoll(s, base, (long long *)res);
382
-	else
383
-		return _kstrtol(s, base, res);
384
-}
385
-
386
-int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
387
-int __must_check kstrtoint(const char *s, unsigned int base, int *res);
388
-
389
-static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
390
-{
391
-	return kstrtoull(s, base, res);
392
-}
393
-
394
-static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res)
395
-{
396
-	return kstrtoll(s, base, res);
397
-}
398
-
399
-static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res)
400
-{
401
-	return kstrtouint(s, base, res);
402
-}
403
-
404
-static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res)
405
-{
406
-	return kstrtoint(s, base, res);
407
-}
408
-
409
-int __must_check kstrtou16(const char *s, unsigned int base, u16 *res);
410
-int __must_check kstrtos16(const char *s, unsigned int base, s16 *res);
411
-int __must_check kstrtou8(const char *s, unsigned int base, u8 *res);
412
-int __must_check kstrtos8(const char *s, unsigned int base, s8 *res);
413
-int __must_check kstrtobool(const char *s, bool *res);
414
-
415
-int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res);
416
-int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res);
417
-int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res);
418
-int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res);
419
-int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res);
420
-int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res);
421
-int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res);
422
-int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res);
423
-int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res);
424
-int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res);
425
-int __must_check kstrtobool_from_user(const char __user *s, size_t count, bool *res);
426
-
427
-static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res)
428
-{
429
-	return kstrtoull_from_user(s, count, base, res);
430
-}
431
-
432
-static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res)
433
-{
434
-	return kstrtoll_from_user(s, count, base, res);
435
-}
436
-
437
-static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res)
438
-{
439
-	return kstrtouint_from_user(s, count, base, res);
440
-}
441
-
442
-static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res)
443
-{
444
-	return kstrtoint_from_user(s, count, base, res);
445
-}
446
-
447
-/* Obsolete, do not use.  Use kstrto<foo> instead */
448
-
449
-extern unsigned long simple_strtoul(const char *,char **,unsigned int);
450
-extern long simple_strtol(const char *,char **,unsigned int);
451
-extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
452
-extern long long simple_strtoll(const char *,char **,unsigned int);
453
332
 
454
333
 extern int num_to_str(char *buf, int size,
455
334
 		      unsigned long long num, unsigned int width);
..
..
@@ -491,6 +370,7 @@
491
370
 extern int kernel_text_address(unsigned long addr);
492
371
 extern int func_ptr_is_kernel_text(void *ptr);
493
372
 
373
+u64 int_pow(u64 base, unsigned int exp);
494
374
 unsigned long int_sqrt(unsigned long);
495
375
 
496
376
 #if BITS_PER_LONG < 64
..
..
@@ -503,12 +383,14 @@
503
383
 #endif
504
384
 
505
385
 extern void bust_spinlocks(int yes);
506
-extern int oops_in_progress;		/* If set, an oops, panic(), BUG() or die() is in progress */
507
386
 extern int panic_timeout;
387
+extern unsigned long panic_print;
508
388
 extern int panic_on_oops;
509
389
 extern int panic_on_unrecovered_nmi;
510
390
 extern int panic_on_io_nmi;
511
391
 extern int panic_on_warn;
392
+extern unsigned long panic_on_taint;
393
+extern bool panic_on_taint_nousertaint;
512
394
 extern int sysctl_panic_on_rcu_stall;
513
395
 extern int sysctl_panic_on_stackoverflow;
514
396
 
..
..
@@ -577,6 +459,7 @@
577
459
 #define TAINT_AUX			16
578
460
 #define TAINT_RANDSTRUCT		17
579
461
 #define TAINT_FLAGS_COUNT		18
462
+#define TAINT_FLAGS_MAX			((1UL << TAINT_FLAGS_COUNT) - 1)
580
463
 
581
464
 struct taint_flag {
582
465
 	char c_true;	/* character printed when tainted */
..
..
@@ -608,7 +491,11 @@
608
491
 	return buf;
609
492
 }
610
493
 
494
+#ifdef __GENKSYMS__
611
495
 extern int hex_to_bin(char ch);
496
+#else
497
+extern int hex_to_bin(unsigned char ch);
498
+#endif
612
499
 extern int __must_check hex2bin(u8 *dst, const char *src, size_t count);
613
500
 extern char *bin2hex(char *dst, const void *src, size_t count);
614
501
 
..
..
@@ -702,7 +589,7 @@
702
589
 #define do_trace_printk(fmt, args...)					\
703
590
 do {									\
704
591
 	static const char *trace_printk_fmt __used			\
705
-		__attribute__((section("__trace_printk_fmt"))) =	\
592
+		__section("__trace_printk_fmt") =			\
706
593
 		__builtin_constant_p(fmt) ? fmt : NULL;			\
707
594
 									\
708
595
 	__trace_printk_check_format(fmt, ##args);			\
..
..
@@ -746,7 +633,7 @@
746
633
 
747
634
 #define trace_puts(str) ({						\
748
635
 	static const char *trace_printk_fmt __used			\
749
-		__attribute__((section("__trace_printk_fmt"))) =	\
636
+		__section("__trace_printk_fmt") =			\
750
637
 		__builtin_constant_p(str) ? str : NULL;			\
751
638
 									\
752
639
 	if (__builtin_constant_p(str))					\
..
..
@@ -768,7 +655,7 @@
768
655
 do {									\
769
656
 	if (__builtin_constant_p(fmt)) {				\
770
657
 		static const char *trace_printk_fmt __used		\
771
-		  __attribute__((section("__trace_printk_fmt"))) =	\
658
+		  __section("__trace_printk_fmt") =			\
772
659
 			__builtin_constant_p(fmt) ? fmt : NULL;		\
773
660
 									\
774
661
 		__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs);	\
..
..
@@ -806,155 +693,6 @@
806
693
 }
807
694
 static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
808
695
 #endif /* CONFIG_TRACING */
809
-
810
-/*
811
- * min()/max()/clamp() macros must accomplish three things:
812
- *
813
- * - avoid multiple evaluations of the arguments (so side-effects like
814
- *   "x++" happen only once) when non-constant.
815
- * - perform strict type-checking (to generate warnings instead of
816
- *   nasty runtime surprises). See the "unnecessary" pointer comparison
817
- *   in __typecheck().
818
- * - retain result as a constant expressions when called with only
819
- *   constant expressions (to avoid tripping VLA warnings in stack
820
- *   allocation usage).
821
- */
822
-#define __typecheck(x, y) \
823
-		(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
824
-
825
-/*
826
- * This returns a constant expression while determining if an argument is
827
- * a constant expression, most importantly without evaluating the argument.
828
- * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
829
- */
830
-#define __is_constexpr(x) \
831
-	(sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
832
-
833
-#define __no_side_effects(x, y) \
834
-		(__is_constexpr(x) && __is_constexpr(y))
835
-
836
-#define __safe_cmp(x, y) \
837
-		(__typecheck(x, y) && __no_side_effects(x, y))
838
-
839
-#define __cmp(x, y, op)	((x) op (y) ? (x) : (y))
840
-
841
-#define __cmp_once(x, y, unique_x, unique_y, op) ({	\
842
-		typeof(x) unique_x = (x);		\
843
-		typeof(y) unique_y = (y);		\
844
-		__cmp(unique_x, unique_y, op); })
845
-
846
-#define __careful_cmp(x, y, op) \
847
-	__builtin_choose_expr(__safe_cmp(x, y), \
848
-		__cmp(x, y, op), \
849
-		__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
850
-
851
-/**
852
- * min - return minimum of two values of the same or compatible types
853
- * @x: first value
854
- * @y: second value
855
- */
856
-#define min(x, y)	__careful_cmp(x, y, <)
857
-
858
-/**
859
- * max - return maximum of two values of the same or compatible types
860
- * @x: first value
861
- * @y: second value
862
- */
863
-#define max(x, y)	__careful_cmp(x, y, >)
864
-
865
-/**
866
- * min3 - return minimum of three values
867
- * @x: first value
868
- * @y: second value
869
- * @z: third value
870
- */
871
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
872
-
873
-/**
874
- * max3 - return maximum of three values
875
- * @x: first value
876
- * @y: second value
877
- * @z: third value
878
- */
879
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
880
-
881
-/**
882
- * min_not_zero - return the minimum that is _not_ zero, unless both are zero
883
- * @x: value1
884
- * @y: value2
885
- */
886
-#define min_not_zero(x, y) ({			\
887
-	typeof(x) __x = (x);			\
888
-	typeof(y) __y = (y);			\
889
-	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
890
-
891
-/**
892
- * clamp - return a value clamped to a given range with strict typechecking
893
- * @val: current value
894
- * @lo: lowest allowable value
895
- * @hi: highest allowable value
896
- *
897
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
898
- * same type as @val.  See the unnecessary pointer comparisons.
899
- */
900
-#define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)
901
-
902
-/*
903
- * ..and if you can't take the strict
904
- * types, you can specify one yourself.
905
- *
906
- * Or not use min/max/clamp at all, of course.
907
- */
908
-
909
-/**
910
- * min_t - return minimum of two values, using the specified type
911
- * @type: data type to use
912
- * @x: first value
913
- * @y: second value
914
- */
915
-#define min_t(type, x, y)	__careful_cmp((type)(x), (type)(y), <)
916
-
917
-/**
918
- * max_t - return maximum of two values, using the specified type
919
- * @type: data type to use
920
- * @x: first value
921
- * @y: second value
922
- */
923
-#define max_t(type, x, y)	__careful_cmp((type)(x), (type)(y), >)
924
-
925
-/**
926
- * clamp_t - return a value clamped to a given range using a given type
927
- * @type: the type of variable to use
928
- * @val: current value
929
- * @lo: minimum allowable value
930
- * @hi: maximum allowable value
931
- *
932
- * This macro does no typechecking and uses temporary variables of type
933
- * @type to make all the comparisons.
934
- */
935
-#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)
936
-
937
-/**
938
- * clamp_val - return a value clamped to a given range using val's type
939
- * @val: current value
940
- * @lo: minimum allowable value
941
- * @hi: maximum allowable value
942
- *
943
- * This macro does no typechecking and uses temporary variables of whatever
944
- * type the input argument @val is.  This is useful when @val is an unsigned
945
- * type and @lo and @hi are literals that will otherwise be assigned a signed
946
- * integer type.
947
- */
948
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
949
-
950
-
951
-/**
952
- * swap - swap values of @a and @b
953
- * @a: first value
954
- * @b: second value
955
- */
956
-#define swap(a, b) \
957
-	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
958
696
 
959
697
 /* This counts to 12. Any more, it will return 13th argument. */
960
698
 #define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n