STRUCT ESW_EADM(9)

💅 struct esw_eadm(9) — like, the EADM Subchannel Extended Status Word (ESW), bestie ✨

okay so this is straight out of the Kernel API Manual and honestly? it's giving "tiny but mighty." 🦋 It's the EADM Subchannel Extended Status Word, aka ESW, and if you're deep in s390 land you already know, iykyk. 👑

🌸 SYNOPSIS 🌸

bestie, here's the whole thing, exactly as it lives, no cap:

struct esw_eadm {
    __u32 sublog;
    struct erw_eadm erw;
    __u32 : 32;
    __u32 : 32;
    __u32 : 32;
 };

lowkey notice those three anonymous __u32 : 32; padding bitfields — they're the quiet besties holding space, not doing much, but absolutely part of the fit. 💅

🎀 Members 🎀

• sublog — the subchannel logout 💖 literally the sublog field, doing its subchannel-logout thing.
• erw — the extended report word ✨ that's it, that's the member, it's an extended report word and it's iconic.

🧚 SEE ALSO 🧚

it's a whole friend group, fr fr — Kernel file ./arch/s390/include/asm/cio.h and everyone in it: struct ccw1(9), struct ccw0(9), struct erw(9), struct erw_eadm(9), struct sublog(9), struct esw0(9), struct esw1(9), struct esw2(9), struct esw3(9), struct irb(9), struct ciw(9), struct ccw_dev_id(9), ccw_dev_id_is_equal(9), pathmask_to_pos(9). 🫶 go say hi, they don't bite. 🌈

and that's the whole page, bestie — 10/10 structure, no notes 💜

this lil legend lives at ./arch/s390/include/asm, dated October 2026, and yes it's still struct esw_eadm(9) if you need to find it again — mwah, slay, periodt. 💅🎀⭐