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985e695074
Add 'const' to some function arguments and variables to make it easier to read the code. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Miroslav Lichvar <mlichvar@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> [jstultz: Also fixup pre-existing checkpatch warnings for prototype arguments with no variable name] Signed-off-by: John Stultz <john.stultz@linaro.org>
34 lines
784 B
C
34 lines
784 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TIMEKEEPING_INTERNAL_H
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#define _TIMEKEEPING_INTERNAL_H
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/*
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* timekeeping debug functions
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*/
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#include <linux/clocksource.h>
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#include <linux/time.h>
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#ifdef CONFIG_DEBUG_FS
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extern void tk_debug_account_sleep_time(const struct timespec64 *t);
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#else
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#define tk_debug_account_sleep_time(x)
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#endif
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#ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
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static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
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{
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u64 ret = (now - last) & mask;
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/*
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* Prevent time going backwards by checking the MSB of mask in
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* the result. If set, return 0.
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*/
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return ret & ~(mask >> 1) ? 0 : ret;
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}
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#else
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static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
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{
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return (now - last) & mask;
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}
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#endif
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#endif /* _TIMEKEEPING_INTERNAL_H */
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