Revert "[PATCH] Enforce "unsigned long flags;" when spinlocking"
[sfrench/cifs-2.6.git] / include / linux / irqflags.h
1 /*
2  * include/linux/irqflags.h
3  *
4  * IRQ flags tracing: follow the state of the hardirq and softirq flags and
5  * provide callbacks for transitions between ON and OFF states.
6  *
7  * This file gets included from lowlevel asm headers too, to provide
8  * wrapped versions of the local_irq_*() APIs, based on the
9  * raw_local_irq_*() macros from the lowlevel headers.
10  */
11 #ifndef _LINUX_TRACE_IRQFLAGS_H
12 #define _LINUX_TRACE_IRQFLAGS_H
13
14 #ifdef CONFIG_TRACE_IRQFLAGS
15   extern void trace_hardirqs_on(void);
16   extern void trace_hardirqs_off(void);
17   extern void trace_softirqs_on(unsigned long ip);
18   extern void trace_softirqs_off(unsigned long ip);
19 # define trace_hardirq_context(p)       ((p)->hardirq_context)
20 # define trace_softirq_context(p)       ((p)->softirq_context)
21 # define trace_hardirqs_enabled(p)      ((p)->hardirqs_enabled)
22 # define trace_softirqs_enabled(p)      ((p)->softirqs_enabled)
23 # define trace_hardirq_enter()  do { current->hardirq_context++; } while (0)
24 # define trace_hardirq_exit()   do { current->hardirq_context--; } while (0)
25 # define trace_softirq_enter()  do { current->softirq_context++; } while (0)
26 # define trace_softirq_exit()   do { current->softirq_context--; } while (0)
27 # define INIT_TRACE_IRQFLAGS    .softirqs_enabled = 1,
28 #else
29 # define trace_hardirqs_on()            do { } while (0)
30 # define trace_hardirqs_off()           do { } while (0)
31 # define trace_softirqs_on(ip)          do { } while (0)
32 # define trace_softirqs_off(ip)         do { } while (0)
33 # define trace_hardirq_context(p)       0
34 # define trace_softirq_context(p)       0
35 # define trace_hardirqs_enabled(p)      0
36 # define trace_softirqs_enabled(p)      0
37 # define trace_hardirq_enter()          do { } while (0)
38 # define trace_hardirq_exit()           do { } while (0)
39 # define trace_softirq_enter()          do { } while (0)
40 # define trace_softirq_exit()           do { } while (0)
41 # define INIT_TRACE_IRQFLAGS
42 #endif
43
44 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
45
46 #include <asm/irqflags.h>
47
48 #define local_irq_enable() \
49         do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
50 #define local_irq_disable() \
51         do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
52 #define local_irq_save(flags) \
53         do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)
54
55 #define local_irq_restore(flags)                                \
56         do {                                                    \
57                 if (raw_irqs_disabled_flags(flags)) {           \
58                         raw_local_irq_restore(flags);           \
59                         trace_hardirqs_off();                   \
60                 } else {                                        \
61                         trace_hardirqs_on();                    \
62                         raw_local_irq_restore(flags);           \
63                 }                                               \
64         } while (0)
65 #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
66 /*
67  * The local_irq_*() APIs are equal to the raw_local_irq*()
68  * if !TRACE_IRQFLAGS.
69  */
70 # define raw_local_irq_disable()        local_irq_disable()
71 # define raw_local_irq_enable()         local_irq_enable()
72 # define raw_local_irq_save(flags)      local_irq_save(flags)
73 # define raw_local_irq_restore(flags)   local_irq_restore(flags)
74 #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
75
76 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
77 #define safe_halt()                                             \
78         do {                                                    \
79                 trace_hardirqs_on();                            \
80                 raw_safe_halt();                                \
81         } while (0)
82
83 #define local_save_flags(flags)         raw_local_save_flags(flags)
84
85 #define irqs_disabled()                                         \
86 ({                                                              \
87         unsigned long flags;                                    \
88                                                                 \
89         raw_local_save_flags(flags);                            \
90         raw_irqs_disabled_flags(flags);                         \
91 })
92
93 #define irqs_disabled_flags(flags)      raw_irqs_disabled_flags(flags)
94 #endif          /* CONFIG_X86 */
95
96 #endif