__acquire_shared(9)
π
__acquire_shared β the Kernel API Manual girlies' edition β¨
okay so bestie, welcome to the Kernel API Manual entry for __acquire_shared β yes that's the manual name, no I'm not skipping it, we're doing this properly π«Ά
πΈ NAME πΈ
__acquire_shared β the function that acquires a context lock shared. that's it. that's the whole job. iconic behaviour honestly π
β¨ SYNOPSIS β¨
__acquire_shared (x );
literally one argument, one call, no drama. she's lowkey minimal π
π¦ ARGUMENTS π¦
xβ the context lock instance pointer. that's your lock girlie, the one we're talking about here π
π§ DESCRIPTION π§
so here's the tea: __acquire_shared is a no-op function β it doesn't actually do anything at runtime, bestie, not a single thing π β but what it represents is acquiring the given context lock instance x with shared access.
it's giving "I'm holding this lock, but like, shared-ly" π. the acquiring is the vibe; the function is a no-op. both things are true and that's the whole point, no cap π₯
don't come for me expecting runtime locking behaviour β the manpage says no-op and I said no-op. we respect the source π
π SEE ALSO π
the whole friend group, and I mean the whole friend group β they're all in the Kernel file ./include/linux/compiler-context-analysis.h and honestly they ate:
__guarded_by(9)__pt_guarded_by(9)context_lock_struct(9)disable_context_analysis(9)enable_context_analysis(9)__no_context_analysis(9)context_unsafe(9)__context_unsafe(9)context_unsafe_alias(9)token_context_lock(9)token_context_lock_instance(9)__must_hold(9)__must_not_hold(9)__acquires(9)__cond_acquires(9)__releases(9)__cond_releases(9)__acquire(9)__release(9)__must_hold_shared(9)__acquires_shared(9)__cond_acquires_shared(9)__releases_shared(9)__release_shared(9)__acquire_ret(9)__acquire_shared_ret(9)
that's 26 besties. I counted. you're welcome π
and that's the page!! π sourced straight from ./include/linux, dated October 2026, and signed off by your girl who read every single one of those SEE ALSO entries so you didn't have to π mwah, go hold your locks (shared-ly), ily, bye β¨
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms