From patchwork Mon Jun 12 14:08:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13276754 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09170C88CB9 for ; Mon, 12 Jun 2023 14:19:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238264AbjFLOS5 (ORCPT ); Mon, 12 Jun 2023 10:18:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237607AbjFLOOe (ORCPT ); Mon, 12 Jun 2023 10:14:34 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 904531982; Mon, 12 Jun 2023 07:14:08 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 4CF6620497; Mon, 12 Jun 2023 14:14:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1686579247; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PjQ0WZPdIw3WWFfN2RUGJfJXUodE1BMieiwQSz+bnM8=; b=ZhGpsGoWoLoCpa4r4d8gggQNXVhJDl8Re5aT378rH/VK4zWs1t5CW+A2r/YhYocOjK++Nd WbFNyL39hQcoG5PXQBL8VZFjeJKG3x4Xlvr+xzfH+VUYA0jhWPcMSuKM6CyWfjivCdAnVR 1m2FTnPlQ6SrhIzllMmLmIrAbEX0oqU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1686579247; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PjQ0WZPdIw3WWFfN2RUGJfJXUodE1BMieiwQSz+bnM8=; b=HVmDNQrInPhLa32Htc4a1d+dAmFldOzp7rhJSpYICAdfkm+6NDb5/R6b36HVkXRWnz7L2s Dq80YBAIEgKT8ECQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id EEA521357F; Mon, 12 Jun 2023 14:14:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id kJJYOS4oh2RwGQAAMHmgww (envelope-from ); Mon, 12 Jun 2023 14:14:06 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, javierm@redhat.com, sam@ravnborg.org, deller@gmx.de, geert+renesas@glider.be, lee@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, dan.carpenter@linaro.org, michael.j.ruhl@intel.com Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-sh@vger.kernel.org, linux-omap@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v2 35/38] fbdev/core: Move procfs code to separate file Date: Mon, 12 Jun 2023 16:08:13 +0200 Message-ID: <20230612141352.29939-36-tzimmermann@suse.de> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230612141352.29939-1-tzimmermann@suse.de> References: <20230612141352.29939-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Move fbdev's procfs code into a separate file and contain it in init and cleanup helpers. For the cleanup, replace remove_proc_entry() with proc_remove(). It is equivalent in functionality, but looks more like an inverse of proc_create_seq(). v2: * document proc_remove() usage (Sam) * revert unrelated removal of for_each_registered_fb() Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg --- drivers/video/fbdev/core/Makefile | 1 + drivers/video/fbdev/core/fb_internal.h | 12 ++++- drivers/video/fbdev/core/fb_procfs.c | 62 ++++++++++++++++++++++++++ drivers/video/fbdev/core/fbmem.c | 48 +++----------------- 4 files changed, 80 insertions(+), 43 deletions(-) create mode 100644 drivers/video/fbdev/core/fb_procfs.c diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile index eee3295bc2252..665320160f70a 100644 --- a/drivers/video/fbdev/core/Makefile +++ b/drivers/video/fbdev/core/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_FB_NOTIFY) += fb_notify.o obj-$(CONFIG_FB) += fb.o fb-y := fb_backlight.o \ fb_info.o \ + fb_procfs.o \ fbmem.o fbmon.o fbcmap.o fbsysfs.o \ modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o fb-$(CONFIG_FB_DEFERRED_IO) += fb_defio.o diff --git a/drivers/video/fbdev/core/fb_internal.h b/drivers/video/fbdev/core/fb_internal.h index 0b9640ae7a3d2..51f7c9f04e45a 100644 --- a/drivers/video/fbdev/core/fb_internal.h +++ b/drivers/video/fbdev/core/fb_internal.h @@ -3,7 +3,17 @@ #ifndef _FB_INTERNAL_H #define _FB_INTERNAL_H -struct fb_info; +#include +#include + +/* fbmem.c */ +extern struct mutex registration_lock; +extern struct fb_info *registered_fb[FB_MAX]; +extern int num_registered_fb; + +/* fb_procfs.c */ +int fb_init_procfs(void); +void fb_cleanup_procfs(void); /* fbsysfs.c */ int fb_device_create(struct fb_info *fb_info); diff --git a/drivers/video/fbdev/core/fb_procfs.c b/drivers/video/fbdev/core/fb_procfs.c new file mode 100644 index 0000000000000..59641142f8aad --- /dev/null +++ b/drivers/video/fbdev/core/fb_procfs.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +#include "fb_internal.h" + +static struct proc_dir_entry *fb_proc_dir_entry; + +static void *fb_seq_start(struct seq_file *m, loff_t *pos) +{ + mutex_lock(®istration_lock); + + return (*pos < FB_MAX) ? pos : NULL; +} + +static void fb_seq_stop(struct seq_file *m, void *v) +{ + mutex_unlock(®istration_lock); +} + +static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) +{ + (*pos)++; + + return (*pos < FB_MAX) ? pos : NULL; +} + +static int fb_seq_show(struct seq_file *m, void *v) +{ + int i = *(loff_t *)v; + struct fb_info *fi = registered_fb[i]; + + if (fi) + seq_printf(m, "%d %s\n", fi->node, fi->fix.id); + + return 0; +} + +static const struct seq_operations __maybe_unused fb_proc_seq_ops = { + .start = fb_seq_start, + .stop = fb_seq_stop, + .next = fb_seq_next, + .show = fb_seq_show, +}; + +int fb_init_procfs(void) +{ + struct proc_dir_entry *proc; + + proc = proc_create_seq("fb", 0, NULL, &fb_proc_seq_ops); + if (!proc) + return -ENOMEM; + + fb_proc_dir_entry = proc; + + return 0; +} + +void fb_cleanup_procfs(void) +{ + proc_remove(fb_proc_dir_entry); +} diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 66532774d351e..536209901e32a 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -24,9 +24,7 @@ #include #include #include -#include #include -#include #include #include #include @@ -48,8 +46,7 @@ #define FBPIXMAPSIZE (1024 * 8) -static DEFINE_MUTEX(registration_lock); - +DEFINE_MUTEX(registration_lock); struct fb_info *registered_fb[FB_MAX] __read_mostly; int num_registered_fb __read_mostly; #define for_each_registered_fb(i) \ @@ -705,40 +702,6 @@ int fb_show_logo(struct fb_info *info, int rotate) { return 0; } EXPORT_SYMBOL(fb_prepare_logo); EXPORT_SYMBOL(fb_show_logo); -static void *fb_seq_start(struct seq_file *m, loff_t *pos) -{ - mutex_lock(®istration_lock); - return (*pos < FB_MAX) ? pos : NULL; -} - -static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) -{ - (*pos)++; - return (*pos < FB_MAX) ? pos : NULL; -} - -static void fb_seq_stop(struct seq_file *m, void *v) -{ - mutex_unlock(®istration_lock); -} - -static int fb_seq_show(struct seq_file *m, void *v) -{ - int i = *(loff_t *)v; - struct fb_info *fi = registered_fb[i]; - - if (fi) - seq_printf(m, "%d %s\n", fi->node, fi->fix.id); - return 0; -} - -static const struct seq_operations __maybe_unused proc_fb_seq_ops = { - .start = fb_seq_start, - .next = fb_seq_next, - .stop = fb_seq_stop, - .show = fb_seq_show, -}; - /* * We hold a reference to the fb_info in file->private_data, * but if the current registered fb has changed, we don't @@ -1624,8 +1587,9 @@ fbmem_init(void) { int ret; - if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops)) - return -ENOMEM; + ret = fb_init_procfs(); + if (ret) + return ret; ret = register_chrdev(FB_MAJOR, "fb", &fb_fops); if (ret) { @@ -1648,7 +1612,7 @@ fbmem_init(void) err_class: unregister_chrdev(FB_MAJOR, "fb"); err_chrdev: - remove_proc_entry("fb", NULL); + fb_cleanup_procfs(); return ret; } @@ -1659,7 +1623,7 @@ fbmem_exit(void) { fb_console_exit(); - remove_proc_entry("fb", NULL); + fb_cleanup_procfs(); class_destroy(fb_class); unregister_chrdev(FB_MAJOR, "fb"); }