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Message-ID: <10f740e80912070032j3ef3e9b2n55199d38abf710d2@mail.gmail.com>
Date: Mon, 7 Dec 2009 09:32:05 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Al Viro <viro@....linux.org.uk>
Cc: linux-arch@...r.kernel.org, torvalds@...ux-foundation.org,
linux-kernel@...r.kernel.org,
"Linux/m68k" <linux-m68k@...r.kernel.org>
Subject: Re: [PATCH 13/19] Unify sys_mmap*
On Mon, Dec 7, 2009 at 04:54, Al Viro <viro@....linux.org.uk> wrote:
>
> New helper - sys_mmap_pgoff(); switch syscalls to using it.
>
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
> arch/alpha/kernel/osf_sys.c | 19 ++-----
> arch/arm/kernel/entry-common.S | 4 +-
> arch/arm/kernel/sys_arm.c | 30 +----------
> arch/avr32/include/asm/syscalls.h | 4 --
> arch/avr32/kernel/sys_avr32.c | 31 -----------
> arch/avr32/kernel/syscall-stubs.S | 2 +-
> arch/blackfin/kernel/sys_bfin.c | 33 -----------
> arch/blackfin/mach-common/entry.S | 2 +-
> arch/cris/kernel/sys_cris.c | 30 +---------
> arch/frv/kernel/sys_frv.c | 66 +----------------------
> arch/h8300/kernel/sys_h8300.c | 83 +----------------------------
> arch/h8300/kernel/syscalls.S | 2 +-
> arch/ia64/kernel/sys_ia64.c | 37 +------------
> arch/m32r/kernel/sys_m32r.c | 24 --------
> arch/m32r/kernel/syscall_table.S | 2 +-
> arch/m68k/kernel/sys_m68k.c | 79 ++--------------------------
> arch/m68knommu/kernel/sys_m68k.c | 38 +------------
> arch/m68knommu/kernel/syscalltable.S | 2 +-
> arch/microblaze/kernel/sys_microblaze.c | 38 +------------
> arch/microblaze/kernel/syscall_table.S | 2 +-
> arch/mips/kernel/linux32.c | 19 +------
> arch/mips/kernel/syscall.c | 29 +---------
> arch/mn10300/kernel/entry.S | 2 +-
> arch/mn10300/kernel/sys_mn10300.c | 31 +----------
> arch/parisc/kernel/sys_parisc.c | 30 ++---------
> arch/powerpc/kernel/syscalls.c | 15 +-----
> arch/s390/kernel/compat_linux.c | 32 +----------
> arch/s390/kernel/sys_s390.c | 30 +----------
> arch/score/kernel/sys_score.c | 21 +------
> arch/sh/kernel/sys_sh.c | 28 +---------
> arch/sparc/kernel/sys_sparc_32.c | 31 ++---------
> arch/sparc/kernel/sys_sparc_64.c | 22 ++------
> arch/um/kernel/syscall.c | 28 +---------
> arch/um/sys-i386/shared/sysdep/syscalls.h | 4 --
> arch/x86/ia32/ia32entry.S | 2 +-
> arch/x86/ia32/sys_ia32.c | 43 +---------------
> arch/x86/include/asm/sys_ia32.h | 3 -
> arch/x86/include/asm/syscalls.h | 2 -
> arch/x86/kernel/sys_i386_32.c | 27 +---------
> arch/x86/kernel/sys_x86_64.c | 17 +------
> arch/x86/kernel/syscall_table_32.S | 2 +-
> arch/xtensa/include/asm/syscall.h | 2 -
> arch/xtensa/include/asm/unistd.h | 2 +-
> arch/xtensa/kernel/syscall.c | 25 ---------
> include/linux/syscalls.h | 4 ++
> mm/util.c | 29 ++++++++++
> 46 files changed, 105 insertions(+), 903 deletions(-)
>
> diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
> index 7deb402..fdab0f0 100644
> --- a/arch/m68k/kernel/sys_m68k.c
> +++ b/arch/m68k/kernel/sys_m68k.c
> @@ -29,37 +29,12 @@
> #include <asm/page.h>
> #include <asm/unistd.h>
>
> -/* common code for old and new mmaps */
> -static inline long do_mmap2(
> - unsigned long addr, unsigned long len,
> - unsigned long prot, unsigned long flags,
> - unsigned long fd, unsigned long pgoff)
> -{
> - int error = -EBADF;
> - struct file * file = NULL;
> -
> - flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
> - if (!(flags & MAP_ANONYMOUS)) {
> - file = fget(fd);
> - if (!file)
> - goto out;
> - }
> -
> - down_write(¤t->mm->mmap_sem);
> - error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
> - up_write(¤t->mm->mmap_sem);
> -
> - if (file)
> - fput(file);
> -out:
> - return error;
> -}
> -
> asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
> unsigned long prot, unsigned long flags,
> unsigned long fd, unsigned long pgoff)
> {
> - return do_mmap2(addr, len, prot, flags, fd, pgoff);
> + /* this is wrong for sun3, BTW */
Can you please add the why part to the comment?
Thanks!
> + return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
> }
>
> /*
> @@ -90,57 +65,11 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
> if (a.offset & ~PAGE_MASK)
> goto out;
>
> - a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
> -
> - error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
> -out:
> - return error;
> -}
> -
> -#if 0
> -struct mmap_arg_struct64 {
> - __u32 addr;
> - __u32 len;
> - __u32 prot;
> - __u32 flags;
> - __u64 offset; /* 64 bits */
> - __u32 fd;
> -};
> -
> -asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
> -{
> - int error = -EFAULT;
> - struct file * file = NULL;
> - struct mmap_arg_struct64 a;
> - unsigned long pgoff;
> -
> - if (copy_from_user(&a, arg, sizeof(a)))
> - return -EFAULT;
> -
> - if ((long)a.offset & ~PAGE_MASK)
> - return -EINVAL;
> -
> - pgoff = a.offset >> PAGE_SHIFT;
> - if ((a.offset >> PAGE_SHIFT) != pgoff)
> - return -EINVAL;
> -
> - if (!(a.flags & MAP_ANONYMOUS)) {
> - error = -EBADF;
> - file = fget(a.fd);
> - if (!file)
> - goto out;
> - }
> - a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
> -
> - down_write(¤t->mm->mmap_sem);
> - error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
> - up_write(¤t->mm->mmap_sem);
> - if (file)
> - fput(file);
> + error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
> + a.offset >> PAGE_SHIFT);
> out:
> return error;
> }
> -#endif
>
> struct sel_arg_struct {
> unsigned long n;
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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