__bitmap_shift_right(9)

💫 __bitmap_shift_right(9) 💫

ok so this is a page straight out of the Kernel API Manual, and bestie, it's a little one but it slaps. we're talking a logical right shift of the bits in a bitmap. that's it. that's the whole vibe. let's get into it 🫶

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✨ NAME ✨

__bitmap_shift_right — logical right shift of the bits in a bitmap

like literally just sliding bits to the right, no cap 💅

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🎀 SYNOPSIS 🎀

void __bitmap_shift_right (unsigned long *dst , const unsigned long *src
, unsigned shift , unsigned nbits );

yes the signature is formatted kinda weird, that's just how the kernel likes it, don't come for me 🙈

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🌸 ARGUMENTS 🌸

• dst — the destination bitmap, aka where the results land. she's the main character of the output 💖
• src — the source bitmap, aka where we're reading the bits from. the origin story ✨
• shift — shift by this many bits. so like, how far we're scooting things over 👉
• nbits — bitmap size, in bits. gotta tell her how big she is or she has no idea where the edge is 😭

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🦋 DESCRIPTION 🦋

ok so shifting right (which is, btw, the same energy as dividing) means moving the bits in the MS -> LS bit direction. most-significant sliding down toward least-significant, cute little journey 🌈

zeros get fed into the vacated MS positions — the empty spots up top get filled with zeros, no leftover drama — and the LS bits that get shifted off the bottom are just lost, gone, not coming back. 💀 rip to those bits honestly.

fr fr: anything that falls off the low end does not come back. no rescue arc. plan accordingly.

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👑 SEE ALSO 👑

• Kernel file ./lib/bitmap.c
• bitmap introduction(9) — start here if you're new, she's iconic
• __bitmap_shift_left(9)
• bitmap_cut(9)
• bitmap_find_next_zero_area_off(9)
• bitmap_pos_to_ord(9)
• bitmap_remap(9)
• bitmap_bitremap(9)
• bitmap_onto(9)
• bitmap_fold(9)
• bitmap_from_arr32(9)
• bitmap_to_arr32(9)
• bitmap_from_arr64(9)
• bitmap_to_arr64(9)

basically the whole bitmap friend group, go say hi 💜

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⭐ ok that's the page!! source is ./lib, dated October 2026, and it's filed under __bitmap_shift_right(9) — mwah, thanks for reading, ily, go shift some bits responsibly 🎀💖✨