Re: [PATCH] Corrections in Documentation/block/ioprio.txt

From: Jens Axboe
Date: Thu Aug 23 2007 - 04:45:39 EST


On Thu, Aug 23 2007, Dhaval Giani wrote:
> On Thu, Aug 23, 2007 at 10:29:30AM +0200, Jens Axboe wrote:
> > On Thu, Aug 23 2007, Dhaval Giani wrote:
> > > Hi Jens,
> > >
> > > The newer glibc does not allow system calls to be made via _syscallN()
> > > wrapper. They have to be made through syscall(). The ionice code used
> > > the older interface. Correcting it to use syscall.
> > >
> > > Signed-of-by: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
> > >
> > >
> > > Index: linux-2.6.23-rc3-mm1/Documentation/block/ioprio.txt
> > > ===================================================================
> > > --- linux-2.6.23-rc3-mm1.orig/Documentation/block/ioprio.txt 2007-07-09 05:02:17.000000000 +0530
> > > +++ linux-2.6.23-rc3-mm1/Documentation/block/ioprio.txt 2007-08-23 13:23:28.000000000 +0530
> > > @@ -86,8 +86,9 @@ extern int sys_ioprio_get(int, int);
> > > #error "Unsupported arch"
> > > #endif
> > >
> > > -_syscall3(int, ioprio_set, int, which, int, who, int, ioprio);
> > > -_syscall2(int, ioprio_get, int, which, int, who);
> > > +#define ioprio_set(which, who, ioprio) syscall(__NR_ioprio_set, which,\
> > > + who, ioprio)
> > > +#define ioprio_get(which, who) syscall(__NR_ioprio_get, which, who)
> >
> > Agree, it fails as-of recent distros. But I prefer a function instead,
> > can you resend with something ala:
> >
> > static inline int ioprio_set(int which, int who, int ioprio)
> > {
> > return syscall(__NR_ioprio_set, which, who, ioprio);
> > }
> >
> > and ditto for ioprio_get()?
> >
> > --
> > Jens Axboe
>
> Done..
>
> ----------------------
>
> The newer glibc does not allow system calls to be made via _syscallN()
> wrapper. They have to be made through syscall(). The ionice code used
> the older interface. Correcting it to use syscall.
>
> Signed-off-by: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
>
>
> Index: linux-2.6.23-rc3-mm1/Documentation/block/ioprio.txt
> ===================================================================
> --- linux-2.6.23-rc3-mm1.orig/Documentation/block/ioprio.txt 2007-07-09 05:02:17.000000000 +0530
> +++ linux-2.6.23-rc3-mm1/Documentation/block/ioprio.txt 2007-08-23 13:46:08.000000000 +0530
> @@ -86,8 +86,15 @@ extern int sys_ioprio_get(int, int);
> #error "Unsupported arch"
> #endif
>
> -_syscall3(int, ioprio_set, int, which, int, who, int, ioprio);
> -_syscall2(int, ioprio_get, int, which, int, who);
> +static inline int ioprio_set(int which, int who, int ioprio)
> +{
> + return syscall(__NR_ioprio_set, which, who, ioprio);
> +}
> +
> +static inline int ioprio_get(int which, int who)
> +{
> + return syscall(__NR_ioprio_get, which, who);
> +}
>
> enum {
> IOPRIO_CLASS_NONE,

Thanks, applied!

--
Jens Axboe

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