From: Tobias Klauser <tklauser@distanz.ch>
To: Ley Foon Tan <lftan@altera.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
lftan.linux@gmail.com, cltang@codesourcery.com
Subject: Re: [PATCH v4 17/29] nios2: System calls handling
Date: Thu, 9 Oct 2014 09:47:29 +0200 [thread overview]
Message-ID: <20141009074729.GN3279@distanz.ch> (raw)
In-Reply-To: <1412760595-3935-18-git-send-email-lftan@altera.com>
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.
next prev parent reply other threads:[~2014-10-09 7:47 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-08 9:29 [PATCH v4 00/29] nios2 Linux kernel port Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 01/29] asm-generic: add generic futex for !CONFIG_SMP Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 02/29] nios2: Assembly macros and definitions Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 03/29] nios2: Kernel booting and initialization Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 04/29] nios2: Exception handling Ley Foon Tan
2014-10-08 22:27 ` Al Viro
2014-10-09 8:31 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 05/29] nios2: Traps exception handling Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 06/29] nios2: Memory management Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 07/29] nios2: I/O Mapping Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 08/29] nios2: MMU Fault handling Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 09/29] nios2: Page table management Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 10/29] nios2: Process management Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 11/29] nios2: Cache handling Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 12/29] nios2: TLB handling Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 13/29] nios2: Interrupt handling Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 10:59 ` Thomas Gleixner
2014-10-08 10:59 ` Thomas Gleixner
2014-10-08 9:29 ` [PATCH v4 14/29] nios2: DMA mapping API Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 15/29] Add ELF machine define for Nios2 Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 16/29] nios2: ELF definitions Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 17/29] nios2: System calls handling Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-09 7:47 ` Tobias Klauser [this message]
2014-10-09 7:47 ` Tobias Klauser
2014-10-09 8:38 ` Ley Foon Tan
2014-10-09 8:38 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 18/29] nios2: Signal handling support Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 11:29 ` Richard Weinberger
2014-10-08 11:29 ` Richard Weinberger
2014-10-09 8:33 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 19/29] nios2: Library functions Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 20/29] nios2: Device tree support Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 21/29] nios2: Time keeping Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 10:44 ` Thomas Gleixner
2014-10-08 15:17 ` Arnd Bergmann
2014-10-08 15:17 ` Arnd Bergmann
2014-10-08 15:20 ` Thomas Gleixner
2014-10-08 15:20 ` Thomas Gleixner
2014-10-08 15:39 ` Arnd Bergmann
2014-10-08 15:39 ` Arnd Bergmann
2014-10-08 16:19 ` Thomas Gleixner
2014-10-08 16:19 ` Thomas Gleixner
2014-10-09 11:57 ` Arnd Bergmann
2014-10-09 11:57 ` Arnd Bergmann
2014-10-09 9:00 ` Ley Foon Tan
2014-10-09 9:00 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 22/29] nios2: Cpuinfo handling Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 23/29] nios2: Miscellaneous header files Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 24/29] nios2: Nios2 registers Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 25/29] nios2: Module support Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 26/29] nios2: ptrace support Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 27/29] MAINTAINERS: Add nios2 maintainer Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 28/29] Documentation: Add documentation for Nios2 architecture Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
2014-10-08 9:29 ` [PATCH v4 29/29] nios2: Build infrastructure Ley Foon Tan
2014-10-08 9:29 ` Ley Foon Tan
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