Messages in this thread | | | Date | Thu, 9 Oct 2014 09:47:29 +0200 | From | Tobias Klauser <> | Subject | Re: [PATCH v4 17/29] nios2: System calls handling |
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On 2014-10-08 at 11:29:43 +0200, Ley Foon Tan <lftan@altera.com> wrote: > This patch adds support for system calls from userspaces. It uses the > asm-generic/unistd.h definitions with architecture spcific syscall. The sys_call_table > is just an array defined in a C file and it contains pointers to the syscall functions. > > Signed-off-by: Ley Foon Tan <lftan@altera.com> > --- > arch/nios2/include/asm/syscall.h | 138 ++++++++++++++++++++++++++++++++++ > arch/nios2/include/asm/syscalls.h | 25 ++++++ > arch/nios2/include/uapi/asm/unistd.h | 25 ++++++ > arch/nios2/kernel/sys_nios2.c | 66 ++++++++++++++++ > arch/nios2/kernel/syscall_table.c | 29 +++++++ > 5 files changed, 283 insertions(+), 0 deletions(-) > create mode 100644 arch/nios2/include/asm/syscall.h > create mode 100644 arch/nios2/include/asm/syscalls.h > create mode 100644 arch/nios2/include/uapi/asm/unistd.h > create mode 100644 arch/nios2/kernel/sys_nios2.c > create mode 100644 arch/nios2/kernel/syscall_table.c [...] > diff --git a/arch/nios2/kernel/sys_nios2.c b/arch/nios2/kernel/sys_nios2.c > new file mode 100644 > index 0000000..a32d7f3 > --- /dev/null > +++ b/arch/nios2/kernel/sys_nios2.c [...] > +#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE) > +#include <linux/fb.h> > +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);
get_fb_unmapped_area only used if HAVE_ARCH_FB_UNMAPPED_AREA is defined, but this isn't the case for nios2. AFAICS the altfb driver has been broken on nios2 for a long time anyway, so I'd suggest to just remove this function for now.
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