Re: [PATCH -v3] flat: fix data sections alignment

[Paul Mundt <lethal@linux-sh.org>]

On Thu, Mar 05, 2009 at 06:00:59PM +0100, Oskar Schirmer wrote:
> The flat loader uses an architecture's flat_stack_align() to align the
> stack but assumes word-alignment is enough for the data sections.
> 
> However, on the Xtensa S6000 we have registers up to 128bit width
> which can be used from userspace and therefor need userspace stack and
> data-section alignment of at least this size.
> 
> This patch drops flat_stack_align() and uses the same alignment that
> is required for slab caches, ARCH_SLAB_MINALIGN, or wordsize if it's
> not defined by the architecture.
> 
> It also fixes m32r which was obviously kaput, aligning an
> uninitialized stack entry instead of the stack pointer.
> 
> Signed-off-by: Oskar Schirmer <os@emlix.com>
> Signed-off-by: Johannes Weiner <jw@emlix.com>
> Cc: David Howells <dhowells@redhat.com>
> Cc: Russell King <rmk@arm.linux.org.uk>
> Cc: Bryan Wu <cooloney@kernel.org>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Cc: Paul Mundt <lethal@linux-sh.org>
> Cc: Greg Ungerer <gerg@uclinux.org>
> Cc: Mike Frysinger <vapier.adi@gmail.com>

The updated version looks ok to me anyways, and it's certainly an
improvement over defining the same alignment requirements all over the
place.

Acked-by: Paul Mundt <lethal@linux-sh.org>