Module Name: src Committed By: riastradh Date: Thu Apr 11 13:51:36 UTC 2024
Modified Files: src/sys/kern: sys_futex.c Log Message: sys_futex.c: Fix illustration of futex(2). In this illustration, we need to _set_ bit 1 to claim ownership, not _clear_ bit 1 to claim ownership. No functional change intended -- comment only. To generate a diff of this commit: cvs rdiff -u -r1.19 -r1.20 src/sys/kern/sys_futex.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/kern/sys_futex.c diff -u src/sys/kern/sys_futex.c:1.19 src/sys/kern/sys_futex.c:1.20 --- src/sys/kern/sys_futex.c:1.19 Fri Feb 24 11:02:27 2023 +++ src/sys/kern/sys_futex.c Thu Apr 11 13:51:36 2024 @@ -1,4 +1,4 @@ -/* $NetBSD: sys_futex.c,v 1.19 2023/02/24 11:02:27 riastradh Exp $ */ +/* $NetBSD: sys_futex.c,v 1.20 2024/04/11 13:51:36 riastradh Exp $ */ /*- * Copyright (c) 2018, 2019, 2020 The NetBSD Foundation, Inc. @@ -30,7 +30,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: sys_futex.c,v 1.19 2023/02/24 11:02:27 riastradh Exp $"); +__KERNEL_RCSID(0, "$NetBSD: sys_futex.c,v 1.20 2024/04/11 13:51:36 riastradh Exp $"); /* * Futexes @@ -62,7 +62,7 @@ __KERNEL_RCSID(0, "$NetBSD: sys_futex.c, * futex(FUTEX_WAIT, &lock, v | 2, NULL, NULL, 0); * continue; * } - * } while (atomic_cas_uint(&lock, v, v & ~1) != v); + * } while (atomic_cas_uint(&lock, v, v | 1) != v); * membar_acquire(); * * ...