[PATCH] Fix CONFIG_COMPAT_VDSO
commita1f3bb9ae4497a2ed3eac773fd7798ac33a0371f
authorRoland McGrath <roland@redhat.com>
Fri, 26 Jan 2007 08:56:46 +0000 (26 00:56 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Fri, 26 Jan 2007 21:50:58 +0000 (26 13:50 -0800)
tree18a8b6a9a26f2148e67109d79d2fe0c330fdeb64
parent7f6ee1adc75bf31d1b76814338f76a88e653cb60
[PATCH] Fix CONFIG_COMPAT_VDSO

I wouldn't mind if CONFIG_COMPAT_VDSO went away entirely.  But if it's there,
it should work properly.  Currently it's quite haphazard: both real vma and
fixmap are mapped, both are put in the two different AT_* slots, sysenter
returns to the vma address rather than the fixmap address, and core dumps yet
are another story.

This patch makes CONFIG_COMPAT_VDSO disable the real vma and use the fixmap
area consistently.  This makes it actually compatible with what the old vdso
implementation did.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/i386/kernel/entry.S
arch/i386/kernel/sysenter.c
include/asm-i386/elf.h
include/asm-i386/fixmap.h
include/asm-i386/page.h