From 96f1050d3df105c9ae6c6ac224f370199ea82fcd Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Thu, 24 Sep 2009 14:11:24 +0000 Subject: Blackfin: mass clean up of copyright/licensing info Bill Gatliff & David Brownell pointed out we were missing some copyrights, and licensing terms in some of the files in ./arch/blackfin, so this fixes things, and cleans them up. It also removes: - verbose GPL text(refer to the top level ./COPYING file) - file names (you are looking at the file) - bug url (it's in the ./MAINTAINERS file) - "or later" on GPL-2, when we did not have that right It also allows some Blackfin-specific assembly files to be under a BSD like license (for people to use them outside of Linux). Signed-off-by: Robin Getz Signed-off-by: Mike Frysinger --- arch/blackfin/kernel/sys_bfin.c | 30 ++++-------------------------- 1 file changed, 4 insertions(+), 26 deletions(-) (limited to 'arch/blackfin/kernel/sys_bfin.c') diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c index 3da60fb13ce..8b294a1c806 100644 --- a/arch/blackfin/kernel/sys_bfin.c +++ b/arch/blackfin/kernel/sys_bfin.c @@ -1,32 +1,10 @@ /* - * File: arch/blackfin/kernel/sys_bfin.c - * Based on: - * Author: + * contains various random system calls that have a non-standard + * calling sequence on the Linux/Blackfin platform. * - * Created: - * Description: This file contains various random system calls that - * have a non-standard calling sequence on the Linux/bfin - * platform. + * Copyright 2004-2009 Analog Devices Inc. * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ #include -- cgit v1.2.3-70-g09d2 From 59bd00c85012af2b59ba8c1b47caaf10ccbfa3b1 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Sun, 27 Sep 2009 15:38:01 +0800 Subject: Blackfin: fix framebuffer mmap bug for nommu The patch added a special get_unmapped_area for framebuffer which was hooked to the file ops in drivers/video/fbmem.c. This is needed since v2.6.29-rc1 where nommu vma management was updated, and mmap of framebuffer caused kernel BUG panic. You may turn on "Debug the global anon/private NOMMU mapping region tree" config to such message. As Documentation/nommu-mmap.txt said, "To provide shareable character device support, a driver must provide a file->f_op->get_unmapped_area() operation. The mmap() routines will call this to get a proposed address for the mapping." With this change, user space should call mmap for framebuffer using shared map. Or it can try shared map first, then private map if failed. This shared map usage is now consistent between mmu and nommu. The sys_ file may not be a good place for this patch. But there is a similar one for sparc. I tested a similar patch on nios2nommu, though I don't have a blackfin board to test. Signed-off-by: Thomas Chou Signed-off-by: Graf Yang Signed-off-by: Michael Hennerich Signed-off-by: Mike Frysinger --- arch/blackfin/include/asm/pgtable.h | 6 ++++++ arch/blackfin/kernel/sys_bfin.c | 11 +++++++++++ 2 files changed, 17 insertions(+) (limited to 'arch/blackfin/kernel/sys_bfin.c') diff --git a/arch/blackfin/include/asm/pgtable.h b/arch/blackfin/include/asm/pgtable.h index b54cbddf547..821c699c223 100644 --- a/arch/blackfin/include/asm/pgtable.h +++ b/arch/blackfin/include/asm/pgtable.h @@ -98,6 +98,12 @@ extern unsigned int kobjsize(const void *objp); #define VMALLOC_START 0 #define VMALLOC_END 0xffffffff +/* provide a special get_unmapped_area for framebuffer mmaps of nommu */ +extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, + unsigned long, unsigned long, + unsigned long); +#define HAVE_ARCH_FB_UNMAPPED_AREA + #include #endif /* _BLACKFIN_PGTABLE_H */ diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c index 8b294a1c806..afcef129d4e 100644 --- a/arch/blackfin/kernel/sys_bfin.c +++ b/arch/blackfin/kernel/sys_bfin.c @@ -69,3 +69,14 @@ asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len) { return safe_dma_memcpy(dest, src, len); } + +#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE) +#include +unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, + unsigned long len, unsigned long pgoff, unsigned long flags) +{ + struct fb_info *info = filp->private_data; + return (unsigned long)info->screen_base; +} +EXPORT_SYMBOL(get_fb_unmapped_area); +#endif -- cgit v1.2.3-70-g09d2