mt_set_in_rcu(9)

💅 mt_set_in_rcu(9) — from the Kernel API Manual ✨

Okay so bestie, welcome to the glow-up era of the Maple Tree 🌳💖 This page lives in the Kernel API Manual (section 9, iykyk) and it's about one tiny little function that flips your tree into RCU safe mode. That's it. That's the whole vibe. Let's get into it 🫶

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✨ NAME ✨

mt_set_in_rcu — Switch the tree to RCU safe mode. Periodt. That's literally the whole job 👑

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🌸 SYNOPSIS 🌸

void mt_set_in_rcu (struct maple_tree *mt );

Not me obsessing over how short this is 😭 no return value, no drama, just vibes and a void.

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🦋 ARGUMENTS 🦋

• mt — The Maple Tree 🌳 Like, your actual tree. The one you want switched over to RCU safe mode. Hand it over and it gets the treatment ✨

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🎀 SEE ALSO 🎀

The whole friend group, fr fr — go say hi to all of them 💜

• Kernel file ./include/linux/maple_tree.h
• Maple tree flags(9)
• MTREE_INIT(9)
• MTREE_INIT_EXT(9)
• mtree_empty(9)
• mas_reset(9)
• mas_for_each(9)
• mas_for_each_rev(9)
• __mas_set_range(9)
• mas_set_range(9)
• mas_set(9)
• mt_init_flags(9)
• mt_init(9)
• mt_clear_in_rcu(9)
• mt_for_each(9)

Lowkey the mt_clear_in_rcu(9) girlies are the reverse of this one — but don't quote me on the details, just go read the page 👀

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That's the whole page, bestie — short and iconic, main character energy only 🌈⭐

Sign-off szn 🎀: this lil masterpiece comes from ./include/linux, dated October 2026, and it's filed under mt_set_in_rcu(9) in case you need to find it again. Mwah 💋✨