49f9c3552c
-----BEGIN PGP SIGNATURE-----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=jhWg
-----END PGP SIGNATURE-----
Merge tag 'init_task-20180117' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull init_task initializer cleanups from David Howells:
"It doesn't seem useful to have the init_task in a header file rather
than in a normal source file. We could consolidate init_task handling
instead and expand out various macros.
Here's a series of patches that consolidate init_task handling:
(1) Make THREAD_SIZE available to vmlinux.lds for cris, hexagon and
openrisc.
(2) Alter the INIT_TASK_DATA linker script macro to set
init_thread_union and init_stack rather than defining these in C.
Insert init_task and init_thread_into into the init_stack area in
the linker script as appropriate to the configuration, with
different section markers so that they end up correctly ordered.
We can then get merge ia64's init_task.c into the main one.
We then have a bunch of single-use INIT_*() macros that seem only
to be macros because they used to be used per-arch. We can then
expand these in place of the user and get rid of a few lines and
a lot of backslashes.
(3) Expand INIT_TASK() in place.
(4) Expand in place various small INIT_*() macros that are defined
conditionally. Expand them and surround them by #if[n]def/#endif
in the .c file as it takes fewer lines.
(5) Expand INIT_SIGNALS() and INIT_SIGHAND() in place.
(6) Expand INIT_STRUCT_PID in place.
These macros can then be discarded"
* tag 'init_task-20180117' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
Expand INIT_STRUCT_PID and remove
Expand the INIT_SIGNALS and INIT_SIGHAND macros and remove
Expand various INIT_* macros and remove
Expand INIT_TASK() in init/init_task.c and remove
Construct init thread stack in the linker script rather than by union
openrisc: Make THREAD_SIZE available to vmlinux.lds
hexagon: Make THREAD_SIZE available to vmlinux.lds
cris: Make THREAD_SIZE available to vmlinux.lds
163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* include/linux/irqflags.h
|
|
*
|
|
* IRQ flags tracing: follow the state of the hardirq and softirq flags and
|
|
* provide callbacks for transitions between ON and OFF states.
|
|
*
|
|
* This file gets included from lowlevel asm headers too, to provide
|
|
* wrapped versions of the local_irq_*() APIs, based on the
|
|
* raw_local_irq_*() macros from the lowlevel headers.
|
|
*/
|
|
#ifndef _LINUX_TRACE_IRQFLAGS_H
|
|
#define _LINUX_TRACE_IRQFLAGS_H
|
|
|
|
#include <linux/typecheck.h>
|
|
#include <asm/irqflags.h>
|
|
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
|
extern void trace_softirqs_on(unsigned long ip);
|
|
extern void trace_softirqs_off(unsigned long ip);
|
|
extern void trace_hardirqs_on(void);
|
|
extern void trace_hardirqs_off(void);
|
|
# define trace_hardirq_context(p) ((p)->hardirq_context)
|
|
# define trace_softirq_context(p) ((p)->softirq_context)
|
|
# define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled)
|
|
# define trace_softirqs_enabled(p) ((p)->softirqs_enabled)
|
|
# define trace_hardirq_enter() \
|
|
do { \
|
|
current->hardirq_context++; \
|
|
} while (0)
|
|
# define trace_hardirq_exit() \
|
|
do { \
|
|
current->hardirq_context--; \
|
|
} while (0)
|
|
# define lockdep_softirq_enter() \
|
|
do { \
|
|
current->softirq_context++; \
|
|
} while (0)
|
|
# define lockdep_softirq_exit() \
|
|
do { \
|
|
current->softirq_context--; \
|
|
} while (0)
|
|
#else
|
|
# define trace_hardirqs_on() do { } while (0)
|
|
# define trace_hardirqs_off() do { } while (0)
|
|
# define trace_softirqs_on(ip) do { } while (0)
|
|
# define trace_softirqs_off(ip) do { } while (0)
|
|
# define trace_hardirq_context(p) 0
|
|
# define trace_softirq_context(p) 0
|
|
# define trace_hardirqs_enabled(p) 0
|
|
# define trace_softirqs_enabled(p) 0
|
|
# define trace_hardirq_enter() do { } while (0)
|
|
# define trace_hardirq_exit() do { } while (0)
|
|
# define lockdep_softirq_enter() do { } while (0)
|
|
# define lockdep_softirq_exit() do { } while (0)
|
|
#endif
|
|
|
|
#if defined(CONFIG_IRQSOFF_TRACER) || \
|
|
defined(CONFIG_PREEMPT_TRACER)
|
|
extern void stop_critical_timings(void);
|
|
extern void start_critical_timings(void);
|
|
#else
|
|
# define stop_critical_timings() do { } while (0)
|
|
# define start_critical_timings() do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* Wrap the arch provided IRQ routines to provide appropriate checks.
|
|
*/
|
|
#define raw_local_irq_disable() arch_local_irq_disable()
|
|
#define raw_local_irq_enable() arch_local_irq_enable()
|
|
#define raw_local_irq_save(flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
flags = arch_local_irq_save(); \
|
|
} while (0)
|
|
#define raw_local_irq_restore(flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
arch_local_irq_restore(flags); \
|
|
} while (0)
|
|
#define raw_local_save_flags(flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
flags = arch_local_save_flags(); \
|
|
} while (0)
|
|
#define raw_irqs_disabled_flags(flags) \
|
|
({ \
|
|
typecheck(unsigned long, flags); \
|
|
arch_irqs_disabled_flags(flags); \
|
|
})
|
|
#define raw_irqs_disabled() (arch_irqs_disabled())
|
|
#define raw_safe_halt() arch_safe_halt()
|
|
|
|
/*
|
|
* The local_irq_*() APIs are equal to the raw_local_irq*()
|
|
* if !TRACE_IRQFLAGS.
|
|
*/
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
|
#define local_irq_enable() \
|
|
do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
|
|
#define local_irq_disable() \
|
|
do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
|
|
#define local_irq_save(flags) \
|
|
do { \
|
|
raw_local_irq_save(flags); \
|
|
trace_hardirqs_off(); \
|
|
} while (0)
|
|
|
|
|
|
#define local_irq_restore(flags) \
|
|
do { \
|
|
if (raw_irqs_disabled_flags(flags)) { \
|
|
raw_local_irq_restore(flags); \
|
|
trace_hardirqs_off(); \
|
|
} else { \
|
|
trace_hardirqs_on(); \
|
|
raw_local_irq_restore(flags); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define safe_halt() \
|
|
do { \
|
|
trace_hardirqs_on(); \
|
|
raw_safe_halt(); \
|
|
} while (0)
|
|
|
|
|
|
#else /* !CONFIG_TRACE_IRQFLAGS */
|
|
|
|
#define local_irq_enable() do { raw_local_irq_enable(); } while (0)
|
|
#define local_irq_disable() do { raw_local_irq_disable(); } while (0)
|
|
#define local_irq_save(flags) \
|
|
do { \
|
|
raw_local_irq_save(flags); \
|
|
} while (0)
|
|
#define local_irq_restore(flags) do { raw_local_irq_restore(flags); } while (0)
|
|
#define safe_halt() do { raw_safe_halt(); } while (0)
|
|
|
|
#endif /* CONFIG_TRACE_IRQFLAGS */
|
|
|
|
#define local_save_flags(flags) raw_local_save_flags(flags)
|
|
|
|
/*
|
|
* Some architectures don't define arch_irqs_disabled(), so even if either
|
|
* definition would be fine we need to use different ones for the time being
|
|
* to avoid build issues.
|
|
*/
|
|
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
|
|
#define irqs_disabled() \
|
|
({ \
|
|
unsigned long _flags; \
|
|
raw_local_save_flags(_flags); \
|
|
raw_irqs_disabled_flags(_flags); \
|
|
})
|
|
#else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
|
#define irqs_disabled() raw_irqs_disabled()
|
|
#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
|
|
|
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
|
|
|
|
#endif
|