Re: fallocate-implementation-on-i86-x86_64-and-powerpc.patch

[Paul Mackerras]

Andrew Morton writes:

> On Wed, 11 Jul 2007 09:27:40 +1000
> Paul Mackerras <paulus@xxxxxxxxx> wrote:
> 
> > We did come up with an order that worked for everybody, but that
> > discussion seemed to get totally ignored by the ext4 developers.
> 
> It was a long discussion.
> 
> Can someone please remind us what the signature of the syscall
> (and the compat handler) should be?

long sys_fallocate(loff_t offset, loff_t len, int fd, int mode)

should work for everybody.  The compat handler would be

long compat_sys_fallocate(u32 offset_hi, u32 offset_lo, u32 len_hi, u32 len_lo,
			  int fd, int mode)

for big-endian, or swap hi/lo for little-endian.  (Actually it would
be good to have an arch-dependent "stitch two args together" macro and
call them offset_0, offset_1 etc.)

Paul.
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