pdc_spaceid_bits(9)

💅 pdc_spaceid_bits — a Kernel API Manual moment

okay so real talk, we're in the pdc_spaceid_bits(9) era of the kernel API manual and honestly? iconic. this one lives in ./arch/parisc/kernel and it's short, sweet, and a little unhinged. bestie, buckle up ✨

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🌸 NAME 🌸

pdc_spaceid_bits — tells you whether Space ID hashing is turned on. that's it. that's the whole gig. 🎀

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🦋 SYNOPSIS 🦋

int pdc_spaceid_bits (unsigned long *space_bits );

like, one argument, one pointer, one int coming back at you. simple. clean. main character energy fr fr 💜

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💅 ARGUMENTS 💅

• space_bits — should be 0. and if it's not 0? bad mojo! 😭 yes, that's the actual warning, and we are NOT getting cursed today, so pass it 0 like a good bestie. lowkey the manpage is being dramatic but we respect it. 🫶

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🔥 DESCRIPTION 🔥

okay so this function returns information about Space ID hashing. that's the vibe. pdc_spaceid_bits hands back info on whether Space ID hashing is on, and you get to find out. it's giving "small function, big responsibilities" ngl 👑

reminder from your girl: space_bits should be 0, and if it isn't — bad mojo. do not test the mojo. 💀

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🌈 SEE ALSO 🌈

the friend group is LARGE and we are not leaving anyone out. every single one of these is invited to the group chat, no cap:

Kernel file ./arch/parisc/kernel/firmware.c:

• f_extend(9)
• convert_to_wide(9)
• set_firmware_width(9)
• pdc_emergency_unlock(9)
• pdc_add_valid(9)
• pdc_instr(9)
• pdc_chassis_info(9)
• pdc_pat_chassis_send_log(9)
• pdc_chassis_disp(9)
• __pdc_cpu_rendezvous(9)
• pdc_cpu_rendezvous_lock(9)
• pdc_cpu_rendezvous_unlock(9)
• pdc_pat_get_PDC_entrypoint(9)
• pdc_chassis_warn(9)
• pdc_coproc_cfg(9)
• pdc_iodc_read(9)
• pdc_system_map_find_mods(9)
• pdc_system_map_find_addrs(9)
• pdc_model_info(9)
• pdc_model_sysmodel(9)
• pdc_model_versions(9)
• pdc_model_cpuid(9)
• pdc_model_capabilities(9)
• pdc_model_platform_info(9)
• pdc_cache_info(9)
• pdc_btlb_info(9)
• pdc_mem_map_hpa(9)
• pdc_lan_station_id(9)
• pdc_stable_read(9)
• pdc_stable_write(9)
• pdc_stable_get_size(9)
• pdc_stable_verify_contents(9)
• pdc_stable_initialize(9)
• pdc_get_initiator(9)
• pdc_pci_irt_size(9)
• pdc_pci_irt(9)
• pdc_pci_config_read(9)
• pdc_pci_config_write(9)
• pdc_tod_read(9)
• pdc_pim_toc11(9)
• pdc_pim_toc20(9)
• pdc_tod_set(9)
• pdc_iodc_print(9)
• pdc_iodc_getc(9)
• pdc_pat_cell_get_number(9)
• pdc_pat_cell_module(9)
• pdc_pat_cell_info(9)
• pdc_pat_cpu_get_number(9)
• pdc_pat_get_irt_size(9)
• pdc_pat_get_irt(9)
• pdc_pat_pd_get_addr_map(9)
• pdc_pat_pd_get_pdc_revisions(9)
• pdc_pat_pd_get_platform_counter(9)
• pdc_pat_io_pci_cfg_read(9)
• pdc_pat_io_pci_cfg_write(9)
• pdc_pat_mem_pdt_info(9)
• pdc_pat_mem_pdt_cell_info(9)
• pdc_pat_mem_read_cell_pdt(9)
• pdc_pat_mem_read_pd_pdt(9)
• pdc_pat_mem_get_dimm_phys_location(9)

like I said. big friend group. ate and left no crumbs 🍓

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anyway bestie, that's the whole page 💖 this little gem comes to you from ./arch/parisc/kernel and it's dated October 2026 — a genuine future classic, we love to see it. go forth, pass 0 to space_bits, and slay ✨👑