From nobody Sun Jan 25 16:16:44 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4dzcHd1bV3z6PkQQ for ; Sun, 25 Jan 2026 16:16:45 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R13" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4dzcHc5l3zz3MHB for ; Sun, 25 Jan 2026 16:16:44 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1769357804; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=KCMjDS9Fv4IJrpkUGAjukqKi2UxnIzdEaLQk6Xqv3hk=; b=RSUuzrsILIvwywVyji2LL4sd4+y6LHhESoM5ouYIHL5MGFGiFRQ6CdbODG9A17S0ZpK5dv nSGR46ZI5uQTW0BklfwEGBOfjz7CM+GFgwgvTHG1hwibTRBxDp+933FilPsHd/J6EAbZKV HczSlHr0Ak065NygzT17SQlWxhR2wrhSMM3XxadZ0u4Fe7NqcRht8n87cb+dW1dYnsrrif XfM6GuAbFsB9hbQZnioS4YH/KJ5p2IxULg2sIAmEq7LTq7f8TK+Ok56GSGSSZ1qt4b59js pnvHF68tB1ESy+OdPVXIQQlrYBtcdnWmodTZI0juSmt6NHC8EJJj1NEwBA8oAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1769357804; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=KCMjDS9Fv4IJrpkUGAjukqKi2UxnIzdEaLQk6Xqv3hk=; b=l9OTUDQ8DQxYcBrPiFNq5T3RWo52ap8KsnVag1U8J3uyTKyhlCc4ikfIa2b5sFN+VSdfNv BhLO0LuuBr8FJxD9sRCNFsNx6q/IS6FZBN5LMYQb2LZda/SqMaq50w5JJCaNNnMZHTC9S9 vYbL8pvQHUenCSzzlllyyajwWXHrmlHlYhTkY4iUuLOF8PWMq0AIvUR39Qsm+0SSIKfvFd 1BhiCCJx9CTxwPK3YFTjSr3+Oi4Y5rQA3Yhs9X+FeCUbiz4sgVic2jbkFrqty0VH7RwZAh cMvP07bkvz22hKWW1e39ROYgnLTh3DSu6NYSUaTIHU2IndPDyB2YPcQqX658HA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1769357804; a=rsa-sha256; cv=none; b=XB9kLq46N5kw5J6mJKsiLpyTTNHHLN3x1Gg2R+FOh5gGTixK0jkbcxjMTv15s4DOl5DfDb jyehHIe04q597zt3HZ5RpbOVD1snoRfM/9K8J1QQ/vlnqE2rNQeCZtfzUkxtHZ1XswnGr1 cW+YCk/ALCrJdRf4JRanbWhbUdMzyTcA5YtfphY8WfkZPCMRFHij/n8IbICqecG0hc8TwY Gezfo7n1Qd1o1QxgG6/P03RozCeeawoxKu2P9UEM2QUERELBMgxl/4Eh5YdhexGqC5WCA0 D/DMuoxH32+VHvpUZf4Ng+lZyofIpwx40BdTUWYO/zQSIWU6uNKIWTFiaPmZdg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4dzcHc55rhzj6T for ; Sun, 25 Jan 2026 16:16:44 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 34ada by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Sun, 25 Jan 2026 16:16:44 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Jean-=?utf-8?Q?S=C3=A9bast?==?utf-8?Q?ien P=C3=A9?=dron Subject: git: a200c8e51cdb - main - linuxkpi: Add eventfd_*() List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: dumbbell X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: a200c8e51cdb4586ad2eb20d2b45ba367f00beaf Auto-Submitted: auto-generated Date: Sun, 25 Jan 2026 16:16:44 +0000 Message-Id: <697641ec.34ada.3568359d@gitrepo.freebsd.org> The branch main has been updated by dumbbell: URL: https://cgit.FreeBSD.org/src/commit/?id=a200c8e51cdb4586ad2eb20d2b45ba367f00beaf commit a200c8e51cdb4586ad2eb20d2b45ba367f00beaf Author: Jean-Sébastien Pédron AuthorDate: 2025-05-26 18:12:40 +0000 Commit: Jean-Sébastien Pédron CommitDate: 2026-01-25 16:04:44 +0000 linuxkpi: Add eventfd_*() Add and expose the `eventfd_*()` API. This is used by DRM drivers for some time, but the code was commented out so far. Note that Linux uses `struct eventfd_ctx`, but FreeBSD defines `struct eventfd`. We define `eventfd_ctx` as a synonym to `eventfd`. Reviewed by: christos, markj Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D50853 --- sys/compat/linuxkpi/common/include/linux/eventfd.h | 54 +++++++++++++++++++ sys/compat/linuxkpi/common/src/linux_eventfd.c | 63 ++++++++++++++++++++++ sys/compat/linuxkpi/dummy/include/linux/eventfd.h | 0 sys/conf/files | 2 + sys/modules/linuxkpi/Makefile | 1 + 5 files changed, 120 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/eventfd.h b/sys/compat/linuxkpi/common/include/linux/eventfd.h new file mode 100644 index 000000000000..d167d4b7d189 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/eventfd.h @@ -0,0 +1,54 @@ +/*- + * Copyright (c) 2025 The FreeBSD Foundation + * Copyright (c) 2025 Jean-Sébastien Pédron + * + * This software was developed by Jean-Sébastien Pédron under sponsorship + * from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef _LINUXKPI_LINUX_EVENTFD_H_ +#define _LINUXKPI_LINUX_EVENTFD_H_ + +#include + +#include +#include +#include +#include +#include + +/* + * Linux uses `struct eventfd_ctx`, but FreeBSD defines `struct eventfd`. Here, + * we define a synonym to the FreeBSD structure. This allows to keep Linux code + * unmodified. + */ +#define eventfd_ctx eventfd + +#define eventfd_ctx_fdget lkpi_eventfd_ctx_fdget +struct eventfd_ctx *lkpi_eventfd_ctx_fdget(int fd); + +#define eventfd_ctx_put lkpi_eventfd_ctx_put +void lkpi_eventfd_ctx_put(struct eventfd_ctx *ctx); + +#endif /* _LINUXKPI_LINUX_EVENTFD_H_ */ diff --git a/sys/compat/linuxkpi/common/src/linux_eventfd.c b/sys/compat/linuxkpi/common/src/linux_eventfd.c new file mode 100644 index 000000000000..126c6c54b9a5 --- /dev/null +++ b/sys/compat/linuxkpi/common/src/linux_eventfd.c @@ -0,0 +1,63 @@ +/*- + * Copyright (c) 2025 The FreeBSD Foundation + * Copyright (c) 2025 Jean-Sébastien Pédron + * + * This software was developed by Jean-Sébastien Pédron under sponsorship + * from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +#include +#include + +#include + +struct eventfd_ctx * +lkpi_eventfd_ctx_fdget(int fd) +{ + struct file *fp; + struct eventfd_ctx *ctx; + + /* Lookup file pointer by file descriptor index. */ + if (fget_unlocked(curthread, fd, &cap_no_rights, &fp) != 0) + return (ERR_PTR(-EBADF)); + + /* + * eventfd_get() bumps the refcount, so we can safely release the + * reference on the file itself afterwards. + */ + ctx = eventfd_get(fp); + fdrop(fp, curthread); + + if (ctx == NULL) + return (ERR_PTR(-EBADF)); + + return (ctx); +} + +void +lkpi_eventfd_ctx_put(struct eventfd_ctx *ctx) +{ + eventfd_put(ctx); +} diff --git a/sys/compat/linuxkpi/dummy/include/linux/eventfd.h b/sys/compat/linuxkpi/dummy/include/linux/eventfd.h deleted file mode 100644 index e69de29bb2d1..000000000000 diff --git a/sys/conf/files b/sys/conf/files index 5f8c9379ddf3..66b84fea1bc0 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -4662,6 +4662,8 @@ compat/linuxkpi/common/src/linux_dmi.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_domain.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" +compat/linuxkpi/common/src/linux_eventfd.c optional compat_linuxkpi \ + compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_firmware.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_folio.c optional compat_linuxkpi \ diff --git a/sys/modules/linuxkpi/Makefile b/sys/modules/linuxkpi/Makefile index 77d73f19075a..2090fe76d857 100644 --- a/sys/modules/linuxkpi/Makefile +++ b/sys/modules/linuxkpi/Makefile @@ -6,6 +6,7 @@ SRCS= linux_compat.c \ linux_devres.c \ linux_dmi.c \ linux_domain.c \ + linux_eventfd.c \ linux_firmware.c \ linux_folio.c \ linux_fpu.c \