From: Thomas Zimmermann <tzimmermann@suse.de>
To: arnd@arndb.de, daniel.vetter@ffwll.ch, deller@gmx.de,
javierm@redhat.com, gregkh@linuxfoundation.org
Cc: linux-arch@vger.kernel.org, linux-fbdev@vger.kernel.org,
dri-devel@lists.freedesktop.org,
linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org,
linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org, x86@kernel.org,
Thomas Zimmermann <tzimmermann@suse.de>
Subject: [PATCH v3 01/19] fbdev: Prepare generic architecture helpers
Date: Mon, 17 Apr 2023 14:56:33 +0200 [thread overview]
Message-ID: <20230417125651.25126-2-tzimmermann@suse.de> (raw)
In-Reply-To: <20230417125651.25126-1-tzimmermann@suse.de>
Generic implementations of fb_pgprotect() and fb_is_primary_device()
have been in the source code for a long time. Prepare the header file
to make use of them.
Improve the code by using an inline function for fb_pgprotect()
and by removing include statements. The default mode set by
fb_pgprotect() is now writecombine, which is what most platforms
want.
Symbols are protected by preprocessor guards. Architectures that
provide a symbol need to define a preprocessor token of the same
name and value. Otherwise the header file will provide a generic
implementation. This pattern has been taken from <asm/io.h>.
v3:
* include the correct header files
v2:
* use writecombine mappings by default (Arnd)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
include/asm-generic/fb.h | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h
index f9f18101ed36..c8af99f5a535 100644
--- a/include/asm-generic/fb.h
+++ b/include/asm-generic/fb.h
@@ -1,13 +1,33 @@
/* SPDX-License-Identifier: GPL-2.0 */
+
#ifndef __ASM_GENERIC_FB_H_
#define __ASM_GENERIC_FB_H_
-#include <linux/fb.h>
-#define fb_pgprotect(...) do {} while (0)
+/*
+ * Only include this header file from your architecture's <asm/fb.h>.
+ */
+
+#include <linux/mm_types.h>
+#include <linux/pgtable.h>
+
+struct fb_info;
+struct file;
+
+#ifndef fb_pgprotect
+#define fb_pgprotect fb_pgprotect
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+ unsigned long off)
+{
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+}
+#endif
+#ifndef fb_is_primary_device
+#define fb_is_primary_device fb_is_primary_device
static inline int fb_is_primary_device(struct fb_info *info)
{
return 0;
}
+#endif
#endif /* __ASM_GENERIC_FB_H_ */
--
2.40.0
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next prev parent reply other threads:[~2023-04-17 12:57 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-17 12:56 [PATCH v3 00/19] arch: Consolidate <asm/fb.h> Thomas Zimmermann
2023-04-17 12:56 ` Thomas Zimmermann [this message]
2023-04-17 12:56 ` [PATCH v3 02/19] arch/arc: Implement <asm/fb.h> with generic helpers Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 03/19] arch/arm: " Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 04/19] arch/arm64: " Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 05/19] arch/ia64: " Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 06/19] arch/loongarch: " Thomas Zimmermann
2023-06-28 10:26 ` WANG Xuerui
2023-04-17 12:56 ` [PATCH v3 07/19] arch/m68k: Merge variants of fb_pgprotect() into single function Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 08/19] arch/m68k: Implement <asm/fb.h> with generic helpers Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 09/19] arch/mips: " Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 10/19] video: Remove trailing whitespaces Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 11/19] video: Move HP PARISC STI core code to shared location Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 12/19] arch/parisc: Remove trailing whitespaces Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 13/19] arch/parisc: Implement fb_is_primary_device() under arch/parisc Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 14/19] arch/parisc: Implement <asm/fb.h> with generic helpers Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 15/19] arch/powerpc: " Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 16/19] arch/sh: " Thomas Zimmermann
2023-04-17 13:02 ` John Paul Adrian Glaubitz
2023-04-17 14:06 ` Thomas Zimmermann
2023-04-17 14:07 ` Thomas Zimmermann
2023-04-17 14:13 ` John Paul Adrian Glaubitz
2023-04-17 14:16 ` Thomas Zimmermann
2023-04-17 14:21 ` John Paul Adrian Glaubitz
2023-04-17 12:56 ` [PATCH v3 17/19] arch/sparc: Implement fb_is_primary_device() in source file Thomas Zimmermann
2023-06-24 1:55 ` [v3,17/19] " Guenter Roeck
2023-06-24 9:27 ` Arnd Bergmann
2023-06-24 13:26 ` Guenter Roeck
2023-06-24 14:21 ` Arnd Bergmann
2023-06-28 10:01 ` Arnd Bergmann
2023-04-17 12:56 ` [PATCH v3 18/19] arch/sparc: Implement <asm/fb.h> with generic helpers Thomas Zimmermann
2023-04-17 12:56 ` [PATCH v3 19/19] arch/x86: " Thomas Zimmermann
2023-04-17 14:12 ` [PATCH v3 00/19] arch: Consolidate <asm/fb.h> Arnd Bergmann
2023-04-18 7:44 ` Thomas Zimmermann
2023-04-19 17:22 ` Helge Deller
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