put_timespec64(9)

✨ put_timespec64 ✨

okay so bestie, we're in the put_timespec64(9) part of the Kernel API Manual and honestly this one is a little superstar 🌟 — it's the girl that takes your kernel-side time value and yeets it out to userspace in the format userspace actually asked for. no cap.

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💖 NAME 💖

put_timespec64 — convert a timespec64 value into __kernel_timespec format and copy the latter to userspace 🫶

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🎀 SYNOPSIS 🎀

int put_timespec64 (const struct timespec64 *ts , struct
       __kernel_timespec __user *uts );

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🌸 ARGUMENTS 🌸

• ts — the input struct timespec64, i.e. the time value coming in. literally the source of truth 💅
• uts — the user's struct __kernel_timespec, i.e. where it's headed. that's the destination, the whole point, the main character of this function 🌈

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⭐ RETURN ⭐

0 on success, or a negative errno on error 😭 — so like, check it, bestie. don't just assume it slayed.

fr fr, a negative errno means something went wrong, and the original page says exactly that and nothing more, so we're not gonna invent drama about which error. nope 🙈

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🦋 SEE ALSO 🦋

the Kernel file ./kernel/time/time.c is where this whole friend group lives, and honestly the guest list is long, so buckle up bestie:

• jiffies_to_msecs(9)
• jiffies_to_usecs(9)
• mktime64(9)
• set_normalized_timespec64(9)
• ns_to_timespec64(9)
• __msecs_to_jiffies(9)
• __usecs_to_jiffies(9)
• timespec64_to_jiffies(9)
• jiffies_to_timespec64(9)
• jiffies_to_clock_t(9)
• clock_t_to_jiffies(9)
• jiffies_64_to_clock_t(9)
• nsec_to_clock_t(9)
• jiffies64_to_nsecs(9)
• jiffies64_to_msecs(9)
• nsecs_to_jiffies64(9)
• nsecs_to_jiffies(9)
• timespec64_add_safe(9)
• get_timespec64(9)
• get_old_timespec32(9)
• put_old_timespec32(9)
• get_itimerspec64(9)
• put_itimerspec64(9)
• get_old_itimerspec32(9)
• put_old_itimerspec32(9)

like, the entire time-conversion clique 👑 and yes, get_timespec64(9) is the reverse-direction bestie — you'll see her around 💜

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and that's the page!! 🍓 cute lil sign-off for you: this one comes from ./kernel/time, dated October 2026, and it's giving "tiny function, huge friend group" energy. periodt. 💅✨🧚