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183f47fcaa
The recent addition of in_serving_softirq() to kconv.h results in compile failure on PREEMPT_RT because it requires task_struct::softirq_disable_cnt. This is not available if kconv.h is included from sched.h. It is not needed to include kconv.h from sched.h. All but the net/ user already include the kconv header file. Move the include of the kconv.h header from sched.h it its users. Additionally include sched.h from kconv.h to ensure that everything task_struct related is available. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Andrey Konovalov <andreyknvl@google.com> Link: https://lkml.kernel.org/r/20210218173124.iy5iyqv3a4oia4vv@linutronix.de
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_KCOV_H
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#define _LINUX_KCOV_H
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#include <linux/sched.h>
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#include <uapi/linux/kcov.h>
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struct task_struct;
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#ifdef CONFIG_KCOV
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enum kcov_mode {
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/* Coverage collection is not enabled yet. */
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KCOV_MODE_DISABLED = 0,
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/* KCOV was initialized, but tracing mode hasn't been chosen yet. */
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KCOV_MODE_INIT = 1,
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/*
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* Tracing coverage collection mode.
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* Covered PCs are collected in a per-task buffer.
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*/
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KCOV_MODE_TRACE_PC = 2,
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/* Collecting comparison operands mode. */
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KCOV_MODE_TRACE_CMP = 3,
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};
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#define KCOV_IN_CTXSW (1 << 30)
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void kcov_task_init(struct task_struct *t);
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void kcov_task_exit(struct task_struct *t);
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#define kcov_prepare_switch(t) \
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do { \
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(t)->kcov_mode |= KCOV_IN_CTXSW; \
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} while (0)
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#define kcov_finish_switch(t) \
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do { \
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(t)->kcov_mode &= ~KCOV_IN_CTXSW; \
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} while (0)
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/* See Documentation/dev-tools/kcov.rst for usage details. */
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void kcov_remote_start(u64 handle);
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void kcov_remote_stop(void);
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u64 kcov_common_handle(void);
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static inline void kcov_remote_start_common(u64 id)
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{
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kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_COMMON, id));
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}
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static inline void kcov_remote_start_usb(u64 id)
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{
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kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_USB, id));
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}
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/*
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* The softirq flavor of kcov_remote_*() functions is introduced as a temporary
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* work around for kcov's lack of nested remote coverage sections support in
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* task context. Adding suport for nested sections is tracked in:
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* https://bugzilla.kernel.org/show_bug.cgi?id=210337
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*/
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static inline void kcov_remote_start_usb_softirq(u64 id)
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{
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if (in_serving_softirq())
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kcov_remote_start_usb(id);
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}
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static inline void kcov_remote_stop_softirq(void)
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{
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if (in_serving_softirq())
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kcov_remote_stop();
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}
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#else
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static inline void kcov_task_init(struct task_struct *t) {}
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static inline void kcov_task_exit(struct task_struct *t) {}
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static inline void kcov_prepare_switch(struct task_struct *t) {}
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static inline void kcov_finish_switch(struct task_struct *t) {}
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static inline void kcov_remote_start(u64 handle) {}
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static inline void kcov_remote_stop(void) {}
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static inline u64 kcov_common_handle(void)
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{
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return 0;
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}
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static inline void kcov_remote_start_common(u64 id) {}
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static inline void kcov_remote_start_usb(u64 id) {}
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static inline void kcov_remote_start_usb_softirq(u64 id) {}
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static inline void kcov_remote_stop_softirq(void) {}
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#endif /* CONFIG_KCOV */
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#endif /* _LINUX_KCOV_H */
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