From patchwork Wed Dec 6 13:50:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 750792 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="Z27BKLGP"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="mHmAeiLo" Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81F2AD49 for ; Wed, 6 Dec 2023 05:51:58 -0800 (PST) Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [10.150.64.98]) (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) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id E9CEC1FD10; Wed, 6 Dec 2023 13:51:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1701870716; 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=MtSb+GHm49vGXRBTa9iiwuA5gsatovU4Rk3wWkhJi+Y=; b=Z27BKLGPeiagG8Ldxmum/a+KPBX+EKBKwdqO0I73C+Xsp2kgE+CKm/r7BurZ+b8cD4yIQN kIpfcSovlJq7Ch0ry+Y+Myf+D9i+bJ0SywYVG4O5ikNPJDIRwetXSnrGbF9h7e+sw7Zi0y 2usS7rlqS9SD62u9u6shR2nXdLR66II= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1701870716; 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=MtSb+GHm49vGXRBTa9iiwuA5gsatovU4Rk3wWkhJi+Y=; b=mHmAeiLoYKEHZ9NsUJUFnXfEE/XfwnoolwxIwthLJzqZOGFlckWzeQMdKVYoZ6CT94+iOg i6AhlFPuIpROWlDQ== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (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) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id B3993133DD; Wed, 6 Dec 2023 13:51:56 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id YHiOKnx8cGWVBgAAn2gu4w (envelope-from ); Wed, 06 Dec 2023 13:51:56 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de, pjones@redhat.com, sui.jingfeng@linux.dev Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 3/4] fbdev/vesafb: Replace references to global screen_info by local pointer Date: Wed, 6 Dec 2023 14:50:28 +0100 Message-ID: <20231206135153.2599-4-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231206135153.2599-1-tzimmermann@suse.de> References: <20231206135153.2599-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Level: Authentication-Results: smtp-out2.suse.de; none X-Spam-Score: -2.10 X-Spamd-Result: default: False [-2.10 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmx.de]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; REPLY(-4.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FREEMAIL_TO(0.00)[redhat.com,gmx.de,linux.dev]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] Get the global screen_info's address once and access the data via this pointer. Limits the use of global state. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/video/fbdev/vesafb.c | 66 +++++++++++++++++++----------------- 1 file changed, 35 insertions(+), 31 deletions(-) diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c index c0edceea0a79..ea89accbec38 100644 --- a/drivers/video/fbdev/vesafb.c +++ b/drivers/video/fbdev/vesafb.c @@ -243,6 +243,7 @@ static int vesafb_setup(char *options) static int vesafb_probe(struct platform_device *dev) { + struct screen_info *si = &screen_info; struct fb_info *info; struct vesafb_par *par; int i, err; @@ -255,17 +256,17 @@ static int vesafb_probe(struct platform_device *dev) fb_get_options("vesafb", &option); vesafb_setup(option); - if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) + if (si->orig_video_isVGA != VIDEO_TYPE_VLFB) return -ENODEV; - vga_compat = (screen_info.capabilities & 2) ? 0 : 1; - vesafb_fix.smem_start = screen_info.lfb_base; - vesafb_defined.bits_per_pixel = screen_info.lfb_depth; + vga_compat = (si->capabilities & 2) ? 0 : 1; + vesafb_fix.smem_start = si->lfb_base; + vesafb_defined.bits_per_pixel = si->lfb_depth; if (15 == vesafb_defined.bits_per_pixel) vesafb_defined.bits_per_pixel = 16; - vesafb_defined.xres = screen_info.lfb_width; - vesafb_defined.yres = screen_info.lfb_height; - vesafb_fix.line_length = screen_info.lfb_linelength; + vesafb_defined.xres = si->lfb_width; + vesafb_defined.yres = si->lfb_height; + vesafb_fix.line_length = si->lfb_linelength; vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; @@ -277,7 +278,7 @@ static int vesafb_probe(struct platform_device *dev) /* size_total -- all video memory we have. Used for mtrr * entries, resource allocation and bounds * checking. */ - size_total = screen_info.lfb_size * 65536; + size_total = si->lfb_size * 65536; if (vram_total) size_total = vram_total * 1024 * 1024; if (size_total < size_vmode) @@ -297,7 +298,7 @@ static int vesafb_probe(struct platform_device *dev) vesafb_fix.smem_len = size_remap; #ifndef __i386__ - screen_info.vesapm_seg = 0; + si->vesapm_seg = 0; #endif if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) { @@ -317,23 +318,26 @@ static int vesafb_probe(struct platform_device *dev) par = info->par; info->pseudo_palette = par->pseudo_palette; - par->base = screen_info.lfb_base; + par->base = si->lfb_base; par->size = size_total; printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n", - vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages); + vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, + vesafb_fix.line_length, si->pages); - if (screen_info.vesapm_seg) { + if (si->vesapm_seg) { printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n", - screen_info.vesapm_seg,screen_info.vesapm_off); + si->vesapm_seg, si->vesapm_off); } - if (screen_info.vesapm_seg < 0xc000) + if (si->vesapm_seg < 0xc000) ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */ if (ypan || pmi_setpal) { + unsigned long pmi_phys; unsigned short *pmi_base; - pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off); + pmi_phys = ((unsigned long)si->vesapm_seg << 4) + si->vesapm_off; + pmi_base = (unsigned short *)phys_to_virt(pmi_phys); pmi_start = (void*)((char*)pmi_base + pmi_base[1]); pmi_pal = (void*)((char*)pmi_base + pmi_base[2]); printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal); @@ -377,14 +381,14 @@ static int vesafb_probe(struct platform_device *dev) vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8; vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8; - vesafb_defined.red.offset = screen_info.red_pos; - vesafb_defined.red.length = screen_info.red_size; - vesafb_defined.green.offset = screen_info.green_pos; - vesafb_defined.green.length = screen_info.green_size; - vesafb_defined.blue.offset = screen_info.blue_pos; - vesafb_defined.blue.length = screen_info.blue_size; - vesafb_defined.transp.offset = screen_info.rsvd_pos; - vesafb_defined.transp.length = screen_info.rsvd_size; + vesafb_defined.red.offset = si->red_pos; + vesafb_defined.red.length = si->red_size; + vesafb_defined.green.offset = si->green_pos; + vesafb_defined.green.length = si->green_size; + vesafb_defined.blue.offset = si->blue_pos; + vesafb_defined.blue.length = si->blue_size; + vesafb_defined.transp.offset = si->rsvd_pos; + vesafb_defined.transp.length = si->rsvd_size; if (vesafb_defined.bits_per_pixel <= 8) { depth = vesafb_defined.green.length; @@ -399,14 +403,14 @@ static int vesafb_probe(struct platform_device *dev) (vesafb_defined.bits_per_pixel > 8) ? "Truecolor" : (vga_compat || pmi_setpal) ? "Pseudocolor" : "Static Pseudocolor", - screen_info.rsvd_size, - screen_info.red_size, - screen_info.green_size, - screen_info.blue_size, - screen_info.rsvd_pos, - screen_info.red_pos, - screen_info.green_pos, - screen_info.blue_pos); + si->rsvd_size, + si->red_size, + si->green_size, + si->blue_size, + si->rsvd_pos, + si->red_pos, + si->green_pos, + si->blue_pos); vesafb_fix.ypanstep = ypan ? 1 : 0; vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;