exynos4_read_count_64(9)

💖 exynos4_read_count_64(9) 💖

okay so bestie, welcome to the Kernel API Manual entry for exynos4_read_count_64 — yes that's a function name, no we're not scared of it 😌✨

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🌸 NAME 🌸

exynos4_read_count_64 — reads all 64 bits of the global counter, every last one of them 👑

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🎀 SYNOPSIS 🎀

u64 exynos4_read_count_64 (void );

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🦋 ARGUMENTS 🦋

• void — no arguments, bestie. literally none. she takes nothing, she gives everything 💅

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✨ DESCRIPTION ✨

so here's the tea 🍓: this function reads all 64-bits of the global counter, and it's very careful about it — it makes sure the upper half and the lower half actually match before handing you the number. no messy mismatched halves on her watch, periodt 🫶

⚠️ but listen — reading the MCT can be quite slow (we're talking hundreds of nanoseconds, which in kernel time is basically a whole errand 😭), so if you can get away with it, use the 32-bit version (lower half only) instead. she said what she said 💀

and what does it give you back? the number of cycles in the global counter. that's it, that's the vibe ⭐

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👑 SEE ALSO 👑

• Kernel file ./drivers/clocksource/exynos_mct.c
• exynos4_read_count_32(9)
• exynos4_timer_interrupts(9)

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and that's the whole page, bestie 🧚💜 this icon was brought to you by the folks over at ./drivers/clocksource, dated October 2026, and yes the source/version line still says exynos4_read_count_64(9) because we respect the lore 🌈 mwah, go read the 32-bit one if you're in a hurry 💋